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Torsades de pointes

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569:, which may promote triggered activity. Re-entry, due to a dispersion of refractory periods, is also possible; this is because M Cells (found in the mid myocardial layer) show a more prolonged repolarization phase in response to potassium blockage than other cells. In turn, this produces a zone of functional refractoriness (inability to depolarize) in the mid myocardial layer. When new action potential is generated, the mid myocardial layer will remain in a refractory period, but the surrounding tissue will depolarize. As soon as the mid myocardial layer is no longer in a refractory period, excitation from nearby tissue will cause a retrograde current and a reentry circuit that will result in a positive chronotropic cycle, leading to tachycardia. 439: 53: 1862:"2015 ESC Guidelines for the management of patients with ventricular arrhythmias and the prevention of sudden cardiac death: The Task Force for the Management of Patients with Ventricular Arrhythmias and the Prevention of Sudden Cardiac Death of the European Society of Cardiology (ESC)Endorsed by: Association for European Paediatric and Congenital Cardiology (AEPC)" 649:. It's considered a cardiac arrhythmia in which the ventricles of the heart become again excited during the repolarization of the previous heart action. Because part of the heart muscle cannot be excited at this early point in time, a premature chamber action can trigger life-threatening cardiac arrhythmias (e.g. ventricular fibrillation or Torsades de pointes). 797:
but lists the singular as a variant, and yet another enters the singular form as the headword and gives a usage comment saying that the plural is not preferred. One group of physicians has suggested that it would make the most sense to use the singular form to refer to the arrhythmia entity (where an
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with a characteristic illusion of a twisting of the QRS complex around the isoelectric baseline (peaks, which are at first pointing up, appear to be pointing down for subsequent "beats" when looking at ECG traces of the "heartbeat"). It is hemodynamically unstable and causes a sudden drop in arterial
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Drew, Barbara J.; Ackerman, Michael J.; Funk, Marjorie; Gibler, W. Brian; Kligfield, Paul; Menon, Venu; Philippides, George J.; Roden, Dan M.; Zareba, Wojciech; American Heart Association Acute Cardiac Care Committee of the Council on Clinical Cardiology; Council on Cardiovascular Nursing; American
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Calcium channels close (inward Ca stops), but potassium channels are still open (outward K current); this persists until the cells gain back normal polarization (repolarization achieved). Please note that phase 0 leads to a net gain of Na, while phases 1–3 lead to a net loss of K. This imbalance is
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Repolarization of the cardiomyocytes occurs in phases 1–3, and is caused predominantly by the outward movement of potassium ions. In Torsades de pointes, however, the repolarization is prolonged; this can be due to electrolyte disturbances (hypokalemia, hypomagnesemia, hypocalcemia), bradycardia,
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Knowledge that TdP may occur in patients taking certain prescription drugs has been both a major liability and reason for removal of 14 medications from the marketplace. Forty-nine drugs known to cause TdP and another 170 that are known to prolong QT remain on the market because the drugs provide
793:) have all often been used. The question of whether each one is grammatically "correct" and the others "incorrect" has repeatedly arisen. This is seen among major medical dictionaries, where one enters only the plural form, another enters the plural form as the 914:
Pickham, David; Helfenbein, Eric; Shinn, Julie A.; Chan, Garrett; Funk, Marjorie; Weinacker, Ann; Liu, Jia-Ni; Drew, Barbara J. (2012). "High prevalence of corrected QT interval prolongation in acutely ill patients is associated with mortality".
600:, wherein the R-wave, representing ventricular depolarization, occurs during the relative refractory period at the end of repolarization (represented by the latter half of the T-wave). An R-on-T can initiate torsades. Sometimes, pathologic 422:(Propulsid) was withdrawn from the US market in 2000 after it was linked to deaths caused by long QT syndrome-induced torsades de pointes. This effect can be directly linked to QT prolongation mediated predominantly by inhibition of the 798:
arrhythmia may involve one or multiple episodes), and that one might best reserve the plural form for describing repeated twisting during a single episode. Other authors have suggested all three words should be plural. Regarding the
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Priori, Silvia G.; Blomström-Lundqvist, Carina; Mazzanti, Andrea; Blom, Nico; Borggrefe, Martin; Camm, John; Elliott, Perry Mark; Fitzsimons, Donna; Hatala, Robert; Hindricks, Gerhard; Kirchhof, Paulus (November 2015).
341:, can result in higher-than-normal levels of medications that prolong the QT interval in the bloodstream and therefore increase a person's risk of developing torsades de pointes. A TdP cardiac event precipitated by 1205:
Woosley, R. L., Heise, C. W., Gallo, T., Tate, J., Woosley, D., and K. A. Romero. www.CredibleMeds.org, QTdrugs List, Accessed 9 June 2019, AZCERT, Inc. 1822 Innovation Park Dr., Oro Valley, AZ
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Torsades occurs as both an inherited (linked to at least 17 genes) and as an acquired form caused most often by drugs and/or electrolyte disorders that cause excessive lengthening of the QT interval.
758:. In coining the term, he referred his colleagues to the "Dictionnaire Le Robert", a bilingual French English dictionary, of which his wife had just given him a copy. Here, "torsade" is defined as: 699:- a procedure in which an electrical current is applied across the heart to temporarily stop and then resynchronise the heart's cells. Treatment to prevent recurrent torsades includes infusion of 1009:
Saprungruang, Ankavipar; Khongphatthanayothin, Apichai; Mauleekoonphairoj, John; Wandee, Pharawee; Kanjanauthai, Supaluck; Bhuiyan, Zahurul A.; Wilde, Arthur A. M.; Poovorawan, Yong (2018).
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The R-on-T phenomenon is the superimposition of a premature ventricular contraction on the T wave of a preceding heart beat. Studies suggest that R-on-T phenomenon is likely to start a sustained
586:. Depending on their cause, most individual episodes of torsades de pointes revert to normal sinus rhythm within a few seconds; however, episodes may also persist and possibly degenerate into 547:
corrected by the Na/K-ATPase channel that pumps K into the cell and sodium out of the cell; this does not change polarization of the cells, but does restore ionic content to its initial state.
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Hoshino, Kenji; Ogawa, Kiyoshi; Hishitani, Takashi; Isobe, Takeshi; Etoh, Yoshikatsu (2006). "Successful uses of magnesium sulfate for torsades de pointes in children with long QT syndrome".
660:) is superimposed during the repolarization phase of the previous action of the heart. Not all premature chamber actions can trigger these dangerous arrhythmias; the risk is increased with 354:
medical benefit and the risk of TdP can be managed and mitigated by instructions in the drug label. Examples of compounds linked to clinical observations of TdP include
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sinus node) will cause minor depolarization in the cells; this will result in increasing permeability of sodium channels, which trigger the opening of sodium channels.
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Medications, hypokalemia, hypomagnesemia, hypocalcemia, bradycardia, heart failure, left ventricular hypertrophy, hypothermia, subarachnoid hemorrhage, hypothyroidism
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can increase a person's risk of developing this abnormal heart rhythm, occurring in between 1% and 10% of patients who receive QT-prolonging antiarrhythmic drugs.
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The treatment of torsades de pointes aims to restore a normal rhythm and to prevent the arrhythmia recurring. While torsades may spontaneously revert to a normal
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A "short-coupled variant of torsade de pointes", which presents without long QT syndrome, was also described in 1994 as having the following characteristics:
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Oksuz, Fatih; Sensoy, Baris; Sahan, Ekrem; Sen, Fatih; Baser, Kazım; Cetin, Hande; Unal, Sefa; Ozeke, Ozcan; Topaloglu, Serkan; Aras, Dursun (July 2015).
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Potassium channels remain open (outward current of K), and calcium channels now also open (inward current of Ca), resulting in a plateau state.
1615:"Short-coupled variant of torsade de pointes. A new electrocardiographic entity in the spectrum of idiopathic ventricular tachyarrhythmias" 2441: 601: 398:
may also increase the risk of developing TdP. It has also been shown as a side effect of certain anti-arrhythmic medications, such as
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Sodium channels open, resulting in the entrance of Na into the cells; this results in the depolarization of the cardiac muscles.
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Sodium channels close; this stops depolarization. Potassium channels open, leading to an outward current of K out of the cells.
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certain drugs (disopyramide, sotalol, amiodarone, amitriptyline, chlorpromazine, erythromycin) and/or congenital syndromes.
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The following is a partial list of factors associated with an increased tendency towards developing torsades de pointes:
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The prolongation of repolarisation may result in subsequent activation of an inward depolarisation current, known as an
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in 1966, when he observed this cardiac rhythm disorder in an 80-year-old female patient with complete intermittent
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In the Lown grading system of ventricular arrhythmias, the R-on-T phenomenon is the fifth, most threatening class.
594:, a condition whereby prolonged QT intervals are visible on an ECG. Long QT intervals predispose the patient to an 3219: 2699: 2480: 1098: 723:
may be used to accelerate the heart's own sinus rhythm, and those at risk of further torsades may be offered an
590:, leading to sudden death in the absence of prompt medical intervention. Torsades de pointes is associated with 2775: 2770: 2694: 1219:
Champeroux, P.; Viaud, K.; El Amrani, A. I.; Fowler, J. S.; Martel, E.; Le Guennec, J. Y.; Richard, S. (2005).
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Napolitano, C.; Priori, S. G.; Schwartz, P. J. (1994-01-01). "Torsade de pointes. Mechanisms and management".
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Preceded by long and short RR-intervals - not present in the short-coupled variant of torsade de pointes
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Yang, T.; Chun, Y. W.; Stroud, D. M.; Mosley, J. D.; Knollmann, B. C.; Hong, C.; Roden, D. M. (2014).
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Lenz T. L.; Hilleman D. E. (July 2000). "Dofetilide, a New Class III Antiarrhythmic Agent".
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Groot, Jan Albert Nicolaas; Ten Bokum, Leonore; Van Den Oever, Hubertus Laurentius Antonius (2018).
844: 3143: 2969: 2899: 2689: 2586: 2567: 2397: 2170: 2043: 960:"Late presentation of Torsades de Pointes related to fluoxetine following a multiple drug overdose" 646: 587: 3176: 3150: 3138: 3126: 3111: 2845: 2787: 2591: 2572: 2224: 2164: 2117: 1221:"Prediction of the risk of Torsade de Pointes using the model of isolated canine Purkinje fibres" 731: 661: 642: 505: 231: 89: 1658: 876: 730:
Magnesium is used in the treatment of torsades de pointes because it functions as a physiologic
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has been reported (although the dose was well beyond the therapeutic range of the medication).
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Leenhardt A, Glaser E, Burguera M, NĂŒrnberg M, Maison-Blanche P, Coumel P (January 1994).
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John, J.; Amley, X.; Bombino, G.; Gitelis, C.; Topi, B.; Hollander, G.; Ghosh, J. (2010).
1272:. Sanoski, Cynthia A.,, Deglin, Judith Hopfer, 1950- (Fourteenth ed.). Philadelphia. 823: 762:
a bundle of threads, twisted in a helix or spiral, for ornamental purposes (such as in an
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Common causes for torsades de pointes include drug-induced QT prolongation and less often
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or congenital long QT syndrome. It can be seen in malnourished individuals and chronic
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Davidson, Sir Stanley (2010). Colledge, Nicki; Walker, Brian; Ralston, Stuart (eds.).
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variation, they concluded, in good nature, "Wasn't it the French who coined the term
700: 443: 306: 235: 77: 1842: 1344: 1107:"Loperamide Induced Torsades de Pointes: A Case Report and Review of the Literature" 1091: 944: 3166: 3058: 2951: 2647: 2083: 2001: 1991: 1950: 1873: 1822: 1785: 1769: 1725: 1717: 1670: 1626: 1585: 1575: 1548: 1520: 1483: 1467: 1379: 1371: 1324: 1240: 1232: 1178: 1170: 1128: 1118: 1071: 1030: 1022: 981: 971: 924: 799: 665: 591: 162: 108: 2097: 1011:"Genotype and clinical characteristics of congenital long QT syndrome in Thailand" 3188: 2580: 2561: 2548: 2355: 2234: 2109: 2048: 1413: 928: 747: 359: 326: 218: 2086: 1328: 3181: 3089: 2987: 2979: 2877: 2387: 2380: 2367: 2059: 1955: 1938: 1758:"Pharmacological treatment of acquired QT prolongation and torsades de pointes" 1674: 1174: 1075: 1059: 1026: 692: 510: 472: 451: 427: 387: 314: 294: 94: 69: 1996: 1939:"As Americans, we should get this right [correspondence and response]" 1878: 1861: 1721: 976: 3208: 3171: 3082: 2217: 1887: 1781: 1682: 1532: 1479: 1471: 1287: 892: 727:
to automatically detect and defibrillate further episodes of the arrhythmia.
696: 673: 669: 490: 1631: 1614: 3103: 3077: 2921: 2869: 2542: 2518: 2465: 2324: 2015: 1964: 1895: 1834: 1799: 1739: 1599: 1497: 1393: 1336: 1254: 1236: 1192: 1142: 1123: 1083: 1044: 995: 936: 859:"TORSADE DE POINTES | Meaning & Definition for UK English | Lexico.com" 763: 712: 703:, correction of electrolyte imbalances such as low blood potassium levels ( 688: 478: 403: 379: 375: 318: 255: 1640: 1580: 1540: 900: 668:). The arrhythmia can also be triggered when an external stimulus such as 52: 3038: 2936: 2726: 2643: 2625: 2451: 2424: 2375: 2316: 751: 711:. Treatments used to prevent torsades in specific circumstances include 704: 622:) - may not be present in the short-coupled variant of torsade de pointes 615: 521:
Action potential of cardiac muscles can be broken down into five phases:
500: 484: 466: 461: 395: 371: 322: 298: 259: 243: 115: 65: 2035: 1690: 879:(1966). "La tachycardie ventriculaire a deux foyers opposes variables". 3066: 2616: 2092: 716: 415: 391: 355: 342: 334: 330: 302: 267: 202: 82: 1773: 1406: 2078: 1858: 419: 411: 407: 363: 263: 824:"Torsade de Pointes: Overview, Pathophysiology, Etiology of Torsade" 2992: 2149: 794: 383: 290: 104: 399: 3072: 3052: 2207: 1612: 657: 1218: 691:, sustained torsades requires emergency treatment to prevent 177: 1932: 1930: 738:
that occur in this phase with calcium influx into the cell.
695:. The most effective treatment to terminate torsades is an 168: 1910:"Episode 12: Why does magnesium treat torsades de pointes?" 957: 664:
of the heart muscle or with prolonged repolarization time (
619: 423: 222:, translated as "twisting of peaks") is a specific type of 188: 1812: 1104: 913: 604:
may be seen in the ECG before the initiation of torsades.
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Clinical Factors Associated with Prolonged QTc and/or TdP
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Mukarram, O.; Hindi, Y.; Catalasan, G.; Ward, J. (2016).
1659:"The "R-on-T" Phenomenon: An Update and Critical Review" 1510: 1430:(21st ed.). United Kingdom: Elsevier. p. 568. 1314: 1561: 1267: 1159:"Prevention of Torsade de Pointes in Hospital Settings" 1456:"Drug induced QT prolongation and torsades de pointes" 1155: 772:
an ornamental motif, as seen on architectural columns.
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are common contributors to torsades de pointes risk.
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The phenomenon was originally described in a French
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Most episodes will revert spontaneously to a normal
205: 196: 185: 180: 165: 1756:Thomas, Simon H. L.; Behr, Elijah R. (March 2016). 1703: 193: 107:, certain drugs, electrolyte disorders which cause 2139: 3206: 1449: 1447: 1058:Schwartz, Peter J.; Woosley, Raymond L. (2016). 1057: 881:Archives des maladies du coeur et des vaisseaux 611:Drastic rotation of the heart's electrical axis 1428:Davidson's Principles and Practice of Medicine 652:On the ECG, this phenomenon is showing when a 234:that exhibits distinct characteristics on the 128:~5% of 300,000 sudden cardiac deaths in the US 2125: 1444: 1214: 1212: 1163:Journal of the American College of Cardiology 1064:Journal of the American College of Cardiology 426:and, in some cases, augmentation of the late 1308: 238:(ECG). It was described by French physician 1015:Indian Pacing and Electrophysiology Journal 875: 577:The ECG tracing in torsades demonstrates a 2442:Arrhythmogenic right ventricular dysplasia 2132: 2118: 1977: 1755: 1454:Yap, Yee Guan; Camm, A John (2017-01-17). 1300:: CS1 maint: location missing publisher ( 1209: 446:showing a TdP patient being shocked by an 51: 2005: 1995: 1954: 1877: 1789: 1729: 1630: 1589: 1579: 1487: 1416:, CredibleMeds.org, accessed 8 June 2019. 1383: 1244: 1182: 1157:College of Cardiology Foundation (2010). 1132: 1122: 1034: 985: 975: 582:blood pressure, leading to dizziness and 418:. In one example, the gastrokinetic drug 64:(TdP) in a 56-year-old white female with 1936: 1762:British Journal of Clinical Pharmacology 1425: 887:(2). Prepared by Rahel Farhad: 263–272. 709:medications that prolong the QT interval 437: 348: 1971: 1453: 14: 3207: 2176:Spontaneous coronary artery dissection 1652: 1650: 1268:Vallerand, April Hazard (2014-06-05). 448:implantable cardioverter-defibrillator 2113: 1854: 1852: 1751: 1749: 1656: 672:falls in the vulnerable phase of the 249: 217: 2500:Nonbacterial thrombotic endocarditis 1606: 719:in long QT syndrome. Occasionally a 636: 258:. Symptoms and consequences include 1706:"The classical "R-on-T" phenomenon" 1647: 1555: 579:polymorphic ventricular tachycardia 24: 2796:Accelerated idioventricular rhythm 1849: 1746: 516: 25: 3231: 1376:10.1161/CIRCULATIONAHA.113.007765 630:premature ventricular contraction 1827:10.1111/j.1442-200X.2006.02177.x 1568:Cardiology Research and Practice 1525:10.2165/00003495-199447010-00004 337:, or particular foods including 161: 2481:Subacute bacterial endocarditis 1902: 1806: 1697: 1504: 1419: 1400: 1351: 1261: 1225:British Journal of Pharmacology 1199: 781:The singular and plural forms ( 433: 325:, when taken concurrently with 1980:"Mon bĂȘte noir (my pet peeve)" 1149: 1060:"Predicting the Unpredictable" 1051: 1002: 951: 907: 869: 851: 816: 776: 274:(during longer episodes), and 13: 1: 2998:Pulseless electrical activity 2927:Multifocal atrial tachycardia 2801:Catecholaminergic polymorphic 1984:Journal of Medical Toxicology 1657:Engel, Toby R. (1978-02-01). 1270:Davis's drug guide for nurses 809: 242:in 1966. Prolongation of the 27:Type of abnormal heart rhythm 929:10.1097/CCM.0b013e318232db4a 682: 572: 496:Left ventricular hypertrophy 7: 1663:Annals of Internal Medicine 1329:10.1592/phco.20.9.776.35208 769:long hair twisted together; 270:(during shorter episodes), 10: 3236: 2942:Wandering atrial pacemaker 2489:non-infective endocarditis 2430:Endocardial fibroelastosis 1956:10.1161/01.CIR.100.13.1462 1675:10.7326/0003-4819-88-2-221 1175:10.1016/j.jacc.2010.01.001 1076:10.1016/j.jacc.2015.12.063 1027:10.1016/j.ipej.2018.07.007 741: 736:early afterdepolarizations 567:early after-depolarisation 3159: 3102: 3020:hexaxial reference system 3011: 2978: 2965:Jervell and Lange-Nielsen 2950: 2908: 2867: 2844: 2818: 2786: 2744: 2725: 2624: 2610: 2510: 2495:Libman–Sacks endocarditis 2464: 2450: 2366: 2315: 2308: 2245: 2200: 2157: 2148: 2069: 2029: 1997:10.1007/s13181-011-0153-7 1722:10.1016/j.ihj.2015.02.030 977:10.1186/s40560-018-0329-1 964:Journal of Intensive Care 725:implantable defibrillator 707:), and withdrawal of any 311:QT-prolonging medications 281: 124: 114: 100: 88: 76: 59: 50: 42: 35: 2900:Ventricular fibrillation 2171:Coronary artery aneurysm 1815:Pediatrics International 1472:10.1136/heart.89.11.1363 1111:Case Reports in Medicine 697:electrical cardioversion 654:ventricular extrasystole 647:ventricular fibrillation 588:ventricular fibrillation 219:[tɔʁsaddəpwɛ̃tÌȘ] 3177:Diastolic heart failure 3151:Athletic heart syndrome 3112:Ventricular hypertrophy 2846:Pre-excitation syndrome 2700:Left posterior fascicle 2225:Acute coronary syndrome 2165:Coronary artery disease 1879:10.1093/europace/euv319 1632:10.1161/01.CIR.89.1.206 732:calcium channel blocker 643:ventricular tachycardia 506:Subarachnoid hemorrhage 450:back to their baseline 232:ventricular tachycardia 3220:French medical phrases 2695:Left anterior fascicle 2475:infective endocarditis 2260:Hibernating myocardium 2141:Cardiovascular disease 1914:The Curious Clinicians 1237:10.1038/sj.bjp.0706070 917:Critical Care Medicine 839:Cite journal requires 756:atrioventricular block 454: 230:. It is a polymorphic 2859:Wolff–Parkinson–White 2819:Premature contraction 2717:Adams–Stokes syndrome 2420:Loeffler endocarditis 2230:Myocardial infarction 475:(low serum magnesium) 469:(low serum potassium) 441: 349:Medications as causes 224:abnormal heart rhythm 109:increased QT interval 3026:Right axis deviation 2988:Sudden cardiac death 2346:Pericardial effusion 2289:Ventricular aneurysm 1710:Indian Heart Journal 1124:10.1155/2016/4061980 791:torsades des pointes 329:inhibitors, such as 276:sudden cardiac death 240:François Dessertenne 228:sudden cardiac death 146:torsades des pointes 3031:Left axis deviation 2888:Atrial fibrillation 2883:Ventricular flutter 2806:Torsades de pointes 2680:Bundle branch block 2639:Sick sinus syndrome 2425:Cardiac amyloidosis 2410:Tachycardia-induced 2265:Myocardial stunning 2213:Prinzmetal's angina 2182:Coronary thrombosis 2098:Torsades de pointes 1978:Mullins ME (2011). 1581:10.4061/2010/524764 865:on August 14, 2020. 787:torsades de pointes 553:Exciting triggers ( 481:(low serum calcium) 299:low serum potassium 295:low serum magnesium 136:Torsades de pointes 70:low blood magnesium 66:low blood potassium 62:torsades de pointes 37:Torsades de pointes 3215:Cardiac arrhythmia 3134:Atrial enlargement 2932:Pacemaker syndrome 2854:Lown–Ganong–Levine 2776:Junctional ectopic 2771:AV nodal reentrant 2277:Myocardial rupture 2187:Coronary vasospasm 2070:External resources 1412:2020-08-16 at the 804:vive la difference 783:torsade de pointes 701:magnesium sulphate 455: 250:Signs and symptoms 140:torsade de pointes 18:Torsade de pointes 3202: 3201: 3194:Obstructive shock 3098: 3097: 3045:Short QT syndrome 3012:Other / ungrouped 3003:Sinoatrial arrest 2918:Ectopic pacemaker 2814: 2813: 2634:Sinus bradycardia 2606: 2605: 2602: 2601: 2351:Cardiac tamponade 2304: 2303: 2294:Dressler syndrome 2192:Myocardial bridge 2107: 2106: 1937:Moise NS (1999). 1872:(11): 1601–1687. 1774:10.1111/bcp.12726 1466:(11): 1363–1372. 1437:978-0-7020-3084-0 1279:978-0-8036-4085-6 1070:(13): 1639–1650. 637:R-on-T phenomenon 597:R-on-T phenomenon 307:drug interactions 236:electrocardiogram 226:that can lead to 132: 131: 68:(2.4 mmol/L) and 30:Medical condition 16:(Redirected from 3227: 3167:Cardiac fibrosis 3059:T wave alternans 2952:Long QT syndrome 2746:Supraventricular 2742: 2741: 2675:Intraventricular 2622: 2621: 2462: 2461: 2313: 2312: 2158:Coronary disease 2155: 2154: 2134: 2127: 2120: 2111: 2110: 2027: 2026: 2020: 2019: 2009: 1999: 1975: 1969: 1968: 1958: 1934: 1925: 1924: 1922: 1921: 1906: 1900: 1899: 1881: 1856: 1847: 1846: 1810: 1804: 1803: 1793: 1753: 1744: 1743: 1733: 1701: 1695: 1694: 1654: 1645: 1644: 1634: 1610: 1604: 1603: 1593: 1583: 1559: 1553: 1552: 1508: 1502: 1501: 1491: 1451: 1442: 1441: 1423: 1417: 1404: 1398: 1397: 1387: 1355: 1349: 1348: 1312: 1306: 1305: 1299: 1291: 1265: 1259: 1258: 1248: 1216: 1207: 1203: 1197: 1196: 1186: 1153: 1147: 1146: 1136: 1126: 1102: 1096: 1095: 1055: 1049: 1048: 1038: 1006: 1000: 999: 989: 979: 955: 949: 948: 911: 905: 904: 873: 867: 866: 861:. Archived from 855: 849: 848: 842: 837: 835: 827: 820: 800:natural language 666:long QT syndrome 599: 598: 592:long QT syndrome 487:(slow heartbeat) 360:fluoroquinolones 221: 216: 212: 211: 208: 207: 204: 201: 198: 195: 191: 190: 187: 183: 182: 179: 176: 173: 170: 167: 55: 33: 32: 21: 3235: 3234: 3230: 3229: 3228: 3226: 3225: 3224: 3205: 3204: 3203: 3198: 3189:Rheumatic fever 3155: 3094: 3007: 2974: 2946: 2904: 2863: 2840: 2810: 2782: 2729: 2721: 2615: 2598: 2506: 2455: 2446: 2362: 2356:Hemopericardium 2300: 2241: 2235:Unstable angina 2208:Angina pectoris 2201:Active ischemia 2196: 2144: 2138: 2108: 2103: 2102: 2065: 2064: 2038: 2024: 2023: 1976: 1972: 1935: 1928: 1919: 1917: 1908: 1907: 1903: 1857: 1850: 1811: 1807: 1754: 1747: 1702: 1698: 1655: 1648: 1611: 1607: 1560: 1556: 1509: 1505: 1452: 1445: 1438: 1424: 1420: 1414:Wayback Machine 1405: 1401: 1356: 1352: 1317:Pharmacotherapy 1313: 1309: 1293: 1292: 1280: 1266: 1262: 1217: 1210: 1204: 1200: 1154: 1150: 1103: 1099: 1056: 1052: 1007: 1003: 956: 952: 912: 908: 877:Dessertenne, F. 874: 870: 857: 856: 852: 840: 838: 829: 828: 822: 821: 817: 812: 779: 748:medical journal 744: 685: 639: 628:Triggered by a 596: 595: 575: 519: 517:Pathophysiology 436: 351: 327:cytochrome P450 284: 268:lightheadedness 252: 214: 192: 184: 164: 160: 60:12-lead ECG of 31: 28: 23: 22: 15: 12: 11: 5: 3233: 3223: 3222: 3217: 3200: 3199: 3197: 3196: 3191: 3186: 3185: 3184: 3182:Cardiac asthma 3179: 3169: 3163: 3161: 3157: 3156: 3154: 3153: 3148: 3147: 3146: 3141: 3131: 3130: 3129: 3124: 3119: 3108: 3106: 3100: 3099: 3096: 3095: 3093: 3092: 3090:Strain pattern 3087: 3086: 3085: 3080: 3075: 3063: 3062: 3061: 3049: 3048: 3047: 3035: 3034: 3033: 3028: 3015: 3013: 3009: 3008: 3006: 3005: 3000: 2995: 2990: 2984: 2982: 2980:Cardiac arrest 2976: 2975: 2973: 2972: 2967: 2962: 2960:Andersen–Tawil 2956: 2954: 2948: 2947: 2945: 2944: 2939: 2934: 2929: 2924: 2914: 2912: 2906: 2905: 2903: 2902: 2897: 2896: 2895: 2885: 2880: 2878:Atrial flutter 2874: 2872: 2865: 2864: 2862: 2861: 2856: 2850: 2848: 2842: 2841: 2839: 2838: 2833: 2828: 2822: 2820: 2816: 2815: 2812: 2811: 2809: 2808: 2803: 2798: 2792: 2790: 2784: 2783: 2781: 2780: 2779: 2778: 2773: 2763: 2762: 2761: 2750: 2748: 2739: 2723: 2722: 2720: 2719: 2714: 2713: 2712: 2707: 2702: 2697: 2692: 2687: 2677: 2672: 2671: 2670: 2665: 2660: 2650: 2641: 2636: 2630: 2628: 2619: 2608: 2607: 2604: 2603: 2600: 2599: 2597: 2596: 2595: 2594: 2589: 2577: 2576: 2575: 2570: 2558: 2557: 2556: 2551: 2539: 2538: 2537: 2532: 2527: 2514: 2512: 2508: 2507: 2505: 2504: 2503: 2502: 2497: 2485: 2484: 2483: 2470: 2468: 2459: 2448: 2447: 2445: 2444: 2439: 2438: 2437: 2432: 2427: 2422: 2417: 2412: 2407: 2402: 2401: 2400: 2388:Cardiomyopathy 2385: 2384: 2383: 2381:Chagas disease 2372: 2370: 2364: 2363: 2361: 2360: 2359: 2358: 2353: 2343: 2342: 2341: 2332: 2321: 2319: 2310: 2306: 2305: 2302: 2301: 2299: 2298: 2297: 2296: 2291: 2281: 2280: 2279: 2269: 2268: 2267: 2262: 2251: 2249: 2243: 2242: 2240: 2239: 2238: 2237: 2232: 2222: 2221: 2220: 2215: 2204: 2202: 2198: 2197: 2195: 2194: 2189: 2184: 2179: 2173: 2168: 2161: 2159: 2152: 2146: 2145: 2137: 2136: 2129: 2122: 2114: 2105: 2104: 2101: 2100: 2089: 2074: 2073: 2071: 2067: 2066: 2063: 2062: 2051: 2039: 2034: 2033: 2031: 2030:Classification 2022: 2021: 1970: 1926: 1901: 1848: 1821:(2): 112–117. 1805: 1768:(3): 420–427. 1745: 1716:(4): 392–394. 1696: 1669:(2): 221–225. 1646: 1605: 1554: 1503: 1443: 1436: 1418: 1399: 1370:(3): 224–234. 1350: 1307: 1278: 1260: 1231:(3): 376–385. 1208: 1198: 1169:(9): 934–947. 1148: 1097: 1050: 1021:(5): 165–171. 1001: 950: 923:(2): 394–399. 906: 868: 850: 841:|journal= 814: 813: 811: 808: 778: 775: 774: 773: 770: 767: 743: 740: 693:cardiac arrest 684: 681: 638: 635: 634: 633: 626: 623: 612: 574: 571: 559: 558: 548: 541: 535: 529: 518: 515: 514: 513: 511:Hypothyroidism 508: 503: 498: 493: 488: 482: 476: 473:Hypomagnesemia 470: 464: 452:cardiac rhythm 435: 432: 428:sodium channel 388:phenothiazines 350: 347: 315:clarithromycin 283: 280: 251: 248: 153:; also called 130: 129: 126: 122: 121: 118: 112: 111: 102: 98: 97: 95:Cardiac arrest 92: 86: 85: 80: 74: 73: 57: 56: 48: 47: 44: 40: 39: 29: 26: 9: 6: 4: 3: 2: 3232: 3221: 3218: 3216: 3213: 3212: 3210: 3195: 3192: 3190: 3187: 3183: 3180: 3178: 3175: 3174: 3173: 3172:Heart failure 3170: 3168: 3165: 3164: 3162: 3158: 3152: 3149: 3145: 3142: 3140: 3137: 3136: 3135: 3132: 3128: 3125: 3123: 3120: 3118: 3115: 3114: 3113: 3110: 3109: 3107: 3105: 3101: 3091: 3088: 3084: 3083:ST depression 3081: 3079: 3076: 3074: 3071: 3070: 3069: 3068: 3064: 3060: 3057: 3056: 3055: 3054: 3050: 3046: 3043: 3042: 3041: 3040: 3036: 3032: 3029: 3027: 3024: 3023: 3022: 3021: 3017: 3016: 3014: 3010: 3004: 3001: 2999: 2996: 2994: 2991: 2989: 2986: 2985: 2983: 2981: 2977: 2971: 2968: 2966: 2963: 2961: 2958: 2957: 2955: 2953: 2949: 2943: 2940: 2938: 2935: 2933: 2930: 2928: 2925: 2923: 2919: 2916: 2915: 2913: 2911: 2907: 2901: 2898: 2894: 2891: 2890: 2889: 2886: 2884: 2881: 2879: 2876: 2875: 2873: 2871: 2866: 2860: 2857: 2855: 2852: 2851: 2849: 2847: 2843: 2837: 2834: 2832: 2829: 2827: 2824: 2823: 2821: 2817: 2807: 2804: 2802: 2799: 2797: 2794: 2793: 2791: 2789: 2785: 2777: 2774: 2772: 2769: 2768: 2767: 2764: 2760: 2757: 2756: 2755: 2752: 2751: 2749: 2747: 2743: 2740: 2737: 2733: 2728: 2724: 2718: 2715: 2711: 2710:Trifascicular 2708: 2706: 2703: 2701: 2698: 2696: 2693: 2691: 2688: 2686: 2683: 2682: 2681: 2678: 2676: 2673: 2669: 2666: 2664: 2661: 2659: 2656: 2655: 2654: 2651: 2649: 2645: 2642: 2640: 2637: 2635: 2632: 2631: 2629: 2627: 2623: 2620: 2618: 2613: 2609: 2593: 2592:regurgitation 2590: 2588: 2585: 2584: 2583: 2582: 2578: 2574: 2573:regurgitation 2571: 2569: 2566: 2565: 2564: 2563: 2559: 2555: 2554:regurgitation 2552: 2550: 2547: 2546: 2545: 2544: 2540: 2536: 2535:regurgitation 2533: 2531: 2528: 2526: 2523: 2522: 2521: 2520: 2516: 2515: 2513: 2509: 2501: 2498: 2496: 2493: 2492: 2491: 2490: 2486: 2482: 2479: 2478: 2477: 2476: 2472: 2471: 2469: 2467: 2463: 2460: 2458: 2453: 2449: 2443: 2440: 2436: 2433: 2431: 2428: 2426: 2423: 2421: 2418: 2416: 2413: 2411: 2408: 2406: 2403: 2399: 2396: 2395: 2394: 2391: 2390: 2389: 2386: 2382: 2379: 2378: 2377: 2374: 2373: 2371: 2369: 2365: 2357: 2354: 2352: 2349: 2348: 2347: 2344: 2340: 2336: 2333: 2331: 2328: 2327: 2326: 2323: 2322: 2320: 2318: 2314: 2311: 2307: 2295: 2292: 2290: 2287: 2286: 2285: 2282: 2278: 2275: 2274: 2273: 2270: 2266: 2263: 2261: 2258: 2257: 2256: 2253: 2252: 2250: 2248: 2244: 2236: 2233: 2231: 2228: 2227: 2226: 2223: 2219: 2218:Stable angina 2216: 2214: 2211: 2210: 2209: 2206: 2205: 2203: 2199: 2193: 2190: 2188: 2185: 2183: 2180: 2177: 2174: 2172: 2169: 2166: 2163: 2162: 2160: 2156: 2153: 2151: 2147: 2142: 2135: 2130: 2128: 2123: 2121: 2116: 2115: 2112: 2099: 2095: 2094: 2090: 2088: 2085: 2081: 2080: 2076: 2075: 2072: 2068: 2061: 2057: 2056: 2052: 2050: 2046: 2045: 2041: 2040: 2037: 2032: 2028: 2017: 2013: 2008: 2003: 1998: 1993: 1989: 1985: 1981: 1974: 1966: 1962: 1957: 1952: 1948: 1944: 1940: 1933: 1931: 1915: 1911: 1905: 1897: 1893: 1889: 1885: 1880: 1875: 1871: 1867: 1863: 1855: 1853: 1844: 1840: 1836: 1832: 1828: 1824: 1820: 1816: 1809: 1801: 1797: 1792: 1787: 1783: 1779: 1775: 1771: 1767: 1763: 1759: 1752: 1750: 1741: 1737: 1732: 1727: 1723: 1719: 1715: 1711: 1707: 1700: 1692: 1688: 1684: 1680: 1676: 1672: 1668: 1664: 1660: 1653: 1651: 1642: 1638: 1633: 1628: 1625:(1): 206–15. 1624: 1620: 1616: 1609: 1601: 1597: 1592: 1587: 1582: 1577: 1573: 1569: 1565: 1558: 1550: 1546: 1542: 1538: 1534: 1530: 1526: 1522: 1518: 1514: 1507: 1499: 1495: 1490: 1485: 1481: 1477: 1473: 1469: 1465: 1461: 1457: 1450: 1448: 1439: 1433: 1429: 1422: 1415: 1411: 1408: 1403: 1395: 1391: 1386: 1381: 1377: 1373: 1369: 1365: 1361: 1354: 1346: 1342: 1338: 1334: 1330: 1326: 1323:(7): 776–86. 1322: 1318: 1311: 1303: 1297: 1289: 1285: 1281: 1275: 1271: 1264: 1256: 1252: 1247: 1242: 1238: 1234: 1230: 1226: 1222: 1215: 1213: 1202: 1194: 1190: 1185: 1180: 1176: 1172: 1168: 1164: 1160: 1152: 1144: 1140: 1135: 1130: 1125: 1120: 1116: 1112: 1108: 1101: 1093: 1089: 1085: 1081: 1077: 1073: 1069: 1065: 1061: 1054: 1046: 1042: 1037: 1032: 1028: 1024: 1020: 1016: 1012: 1005: 997: 993: 988: 983: 978: 973: 969: 965: 961: 954: 946: 942: 938: 934: 930: 926: 922: 918: 910: 902: 898: 894: 890: 886: 883:(in French). 882: 878: 872: 864: 860: 854: 846: 833: 826:. 2021-04-03. 825: 819: 815: 807: 805: 801: 796: 792: 788: 784: 771: 768: 765: 761: 760: 759: 757: 753: 749: 739: 737: 733: 728: 726: 722: 718: 714: 713:beta blockers 710: 706: 702: 698: 694: 690: 680: 677: 675: 674:cardiac cycle 671: 670:cardioversion 667: 663: 659: 655: 650: 648: 644: 631: 627: 624: 621: 617: 613: 610: 609: 608: 605: 603: 593: 589: 585: 580: 570: 568: 563: 556: 552: 549: 545: 542: 539: 536: 533: 530: 527: 524: 523: 522: 512: 509: 507: 504: 502: 499: 497: 494: 492: 491:Heart failure 489: 486: 483: 480: 477: 474: 471: 468: 465: 463: 460: 459: 458: 453: 449: 445: 440: 431: 429: 425: 421: 417: 413: 409: 405: 401: 397: 393: 389: 385: 381: 377: 373: 369: 365: 361: 357: 346: 344: 340: 336: 332: 328: 324: 320: 316: 312: 308: 304: 300: 296: 292: 287: 279: 277: 273: 269: 265: 261: 257: 247: 245: 241: 237: 233: 229: 225: 220: 210: 158: 157: 152: 148: 147: 142: 141: 137: 127: 123: 119: 117: 113: 110: 106: 103: 99: 96: 93: 91: 90:Complications 87: 84: 81: 79: 75: 71: 67: 63: 58: 54: 49: 45: 41: 38: 34: 19: 3104:Cardiomegaly 3078:ST elevation 3065: 3051: 3037: 3018: 2922:Ectopic beat 2870:fibrillation 2805: 2705:Bifascicular 2579: 2560: 2541: 2517: 2487: 2473: 2466:Endocarditis 2405:Hypertrophic 2339:Constrictive 2325:Pericarditis 2283: 2271: 2254: 2091: 2077: 2053: 2042: 1987: 1983: 1973: 1949:(13): 1462. 1946: 1942: 1918:. Retrieved 1916:. 2020-10-28 1913: 1904: 1869: 1865: 1818: 1814: 1808: 1765: 1761: 1713: 1709: 1699: 1666: 1662: 1622: 1618: 1608: 1571: 1567: 1557: 1519:(1): 51–65. 1516: 1512: 1506: 1463: 1459: 1427: 1421: 1402: 1367: 1363: 1353: 1320: 1316: 1310: 1269: 1263: 1228: 1224: 1201: 1166: 1162: 1151: 1114: 1110: 1100: 1067: 1063: 1053: 1018: 1014: 1004: 967: 963: 953: 920: 916: 909: 884: 880: 871: 863:the original 853: 832:cite journal 818: 803: 790: 786: 782: 780: 764:Aran sweater 745: 729: 705:hypokalaemia 689:sinus rhythm 686: 678: 651: 640: 632:(R-on-T PVC) 606: 578: 576: 564: 560: 554: 550: 543: 537: 531: 525: 520: 479:Hypocalcemia 456: 434:Risk factors 424:hERG channel 404:procainamide 380:azithromycin 376:erythromycin 352: 319:levofloxacin 288: 285: 260:palpitations 256:sinus rhythm 253: 155: 154: 150: 145: 144: 139: 135: 134: 133: 116:Risk factors 61: 36: 2970:Romano–Ward 2937:Parasystole 2836:Ventricular 2788:Ventricular 2727:Tachycardia 2644:Heart block 2626:Bradycardia 2452:Endocardium 2415:Restrictive 2376:Myocarditis 2317:Pericardium 1943:Circulation 1866:EP Europace 1619:Circulation 1364:Circulation 777:Terminology 752:Dessertenne 616:QT interval 501:Hypothermia 485:Bradycardia 467:Hypokalemia 462:Medications 396:ondansetron 392:anti-emetic 372:chloroquine 323:haloperidol 244:QT interval 72:(1.6 mg/dL) 43:Other names 3209:Categories 2868:Flutter / 2831:Junctional 2766:Junctional 2759:Multifocal 2732:paroxysmal 2648:Sinoatrial 2617:arrhythmia 2612:Conduction 2368:Myocardium 2093:Patient UK 2055:DiseasesDB 1990:(2): 181. 1920:2023-10-23 810:References 717:mexiletine 614:Prolonged 416:dofetilide 356:amiodarone 343:loperamide 339:grapefruit 335:cimetidine 331:fluoxetine 303:alcoholics 105:Hereditary 83:Cardiology 46:Torsade(s) 3127:Pulmonary 2910:Pacemaker 2581:pulmonary 2562:tricuspid 2398:Alcoholic 2087:emerg/596 2079:eMedicine 1888:1532-2092 1782:1365-2125 1683:0003-4819 1533:0012-6667 1480:1355-6037 1296:cite book 1288:881473728 893:0003-9683 721:pacemaker 683:Treatment 602:T-U waves 573:Diagnosis 420:cisapride 412:ibutilide 408:quinidine 364:methadone 264:dizziness 78:Specialty 2993:Asystole 2893:Familial 2587:stenosis 2568:stenosis 2549:stenosis 2530:stenosis 2525:prolapse 2247:Sequelae 2150:Ischemia 2084:med/2286 2016:21461788 1965:10500317 1896:26318695 1843:24904388 1835:16635167 1800:26183037 1740:26304578 1600:21253542 1498:14594906 1410:Archived 1394:24895457 1345:19897963 1337:10907968 1255:15655517 1193:20185054 1143:26989420 1092:35723658 1084:27150690 1045:30036649 996:30214811 945:27017787 937:22001585 795:headword 662:ischemia 584:fainting 551:Phase 4: 544:Phase 3: 538:Phase 2: 532:Phase 1: 526:Phase 0: 442:Lead II 384:pimozide 313:such as 291:diarrhea 272:fainting 156:torsades 2393:Dilated 2335:Chronic 2143:(heart) 2049:D016171 2007:3724434 1791:4767204 1731:4561790 1641:8281648 1591:3021856 1574:: 1–4. 1549:1153199 1541:7510621 1489:1767957 1385:4101031 1246:1576014 1184:3057430 1134:4775784 1117:: 1–3. 1036:6198685 987:6131849 901:4956181 742:History 400:sotalol 368:lithium 358:, most 215:French: 3073:J wave 2826:Atrial 2754:Atrial 2543:aortic 2519:mitral 2511:Valves 2457:valves 2309:Layers 2178:(SCAD) 2014:  2004:  1963:  1894:  1886:  1841:  1833:  1798:  1788:  1780:  1738:  1728:  1689:  1681:  1639:  1598:  1588:  1547:  1539:  1531:  1496:  1486:  1478:  1434:  1392:  1382:  1343:  1335:  1286:  1276:  1253:  1243:  1206:85755. 1191:  1181:  1141:  1131:  1090:  1082:  1043:  1033:  994:  984:  970:: 59. 943:  935:  899:  891:  658:T-wave 414:, and 394:agent 390:. The 386:, and 297:, and 282:Causes 125:Deaths 101:Causes 3160:Other 3144:Right 3122:Right 2736:sinus 2685:Right 2435:Viral 2330:Acute 2284:weeks 2255:hours 2167:(CAD) 2060:29252 1839:S2CID 1691:75705 1545:S2CID 1513:Drugs 1460:Heart 1341:S2CID 1088:S2CID 941:S2CID 656:(R) ( 321:, or 3139:Left 3117:Left 2734:and 2690:Left 2272:days 2044:MeSH 2012:PMID 1961:PMID 1892:PMID 1884:ISSN 1831:PMID 1796:PMID 1778:ISSN 1736:PMID 1687:PMID 1679:ISSN 1637:PMID 1596:PMID 1572:2010 1537:PMID 1529:ISSN 1494:PMID 1476:ISSN 1432:ISBN 1390:PMID 1333:PMID 1302:link 1284:OCLC 1274:ISBN 1251:PMID 1189:PMID 1139:PMID 1115:2016 1080:PMID 1041:PMID 992:PMID 933:PMID 897:PMID 889:ISSN 845:help 789:and 645:and 620:LQTS 555:e.g. 2002:PMC 1992:doi 1951:doi 1947:100 1874:doi 1823:doi 1786:PMC 1770:doi 1726:PMC 1718:doi 1671:doi 1627:doi 1586:PMC 1576:doi 1521:doi 1484:PMC 1468:doi 1380:PMC 1372:doi 1368:130 1325:doi 1241:PMC 1233:doi 1229:144 1179:PMC 1171:doi 1129:PMC 1119:doi 1072:doi 1031:PMC 1023:doi 982:PMC 972:doi 925:doi 806:?" 750:by 715:or 444:ECG 169:ɔːr 159:) ( 151:TdP 143:or 3211:: 3067:ST 3039:QT 2920:/ 2668:3° 2663:2° 2658:1° 2653:AV 2646:: 2337:/ 2096:: 2082:: 2058:: 2047:: 2010:. 2000:. 1986:. 1982:. 1959:. 1945:. 1941:. 1929:^ 1912:. 1890:. 1882:. 1870:17 1868:. 1864:. 1851:^ 1837:. 1829:. 1819:48 1817:. 1794:. 1784:. 1776:. 1766:81 1764:. 1760:. 1748:^ 1734:. 1724:. 1714:67 1712:. 1708:. 1685:. 1677:. 1667:88 1665:. 1661:. 1649:^ 1635:. 1623:89 1621:. 1617:. 1594:. 1584:. 1570:. 1566:. 1543:. 1535:. 1527:. 1517:47 1515:. 1492:. 1482:. 1474:. 1464:89 1462:. 1458:. 1446:^ 1388:. 1378:. 1366:. 1362:. 1339:. 1331:. 1321:20 1319:. 1298:}} 1294:{{ 1282:. 1249:. 1239:. 1227:. 1223:. 1211:^ 1187:. 1177:. 1167:55 1165:. 1161:. 1137:. 1127:. 1113:. 1109:. 1086:. 1078:. 1068:67 1066:. 1062:. 1039:. 1029:. 1019:18 1017:. 1013:. 990:. 980:. 966:. 962:. 939:. 931:. 921:40 919:. 895:. 885:59 836:: 834:}} 830:{{ 785:, 766:); 676:. 430:. 410:, 406:, 402:, 382:, 378:, 374:, 370:, 366:, 362:, 333:, 317:, 293:, 278:. 266:, 262:, 213:, 203:ĂŠÌƒ 178:ɑː 138:, 3053:T 2738:) 2730:( 2614:/ 2454:/ 2133:e 2126:t 2119:v 2036:D 2018:. 1994:: 1988:7 1967:. 1953:: 1923:. 1898:. 1876:: 1845:. 1825:: 1802:. 1772:: 1742:. 1720:: 1693:. 1673:: 1643:. 1629:: 1602:. 1578:: 1551:. 1523:: 1500:. 1470:: 1440:. 1396:. 1374:: 1347:. 1327:: 1304:) 1290:. 1257:. 1235:: 1195:. 1173:: 1145:. 1121:: 1094:. 1074:: 1047:. 1025:: 998:. 974:: 968:6 947:. 927:: 903:. 847:) 843:( 618:( 209:/ 206:t 200:w 197:p 194:ˈ 189:ə 186:d 181:d 175:s 172:ˌ 166:t 163:/ 149:( 20:)

Index

Torsade de pointes

low blood potassium
low blood magnesium
Specialty
Cardiology
Complications
Cardiac arrest
Hereditary
increased QT interval
Risk factors
/tɔːrˌsɑːddəˈpwĂŠÌƒt/
[tɔʁsaddəpwɛ̃tÌȘ]
abnormal heart rhythm
sudden cardiac death
ventricular tachycardia
electrocardiogram
François Dessertenne
QT interval
sinus rhythm
palpitations
dizziness
lightheadedness
fainting
sudden cardiac death
diarrhea
low serum magnesium
low serum potassium
alcoholics
drug interactions

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