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Female gender as a risk factor for torsades de pointes associated with cardiovascular drugs.
JAMA
December 1993
Department of Internal Medicine, Wayne State University/Harper Hospital, Detroit, Mich.
Objective: To test the hypothesis that female prevalence is greater than expected among reported cases of torsades de pointes associated with cardiovascular drugs that prolong cardiac repolarization.
Data Sources: A MEDLINE search of the English-language literature for the period of 1980 through 1992, using the terms torsade de pointes, polymorphic ventricular tachycardia, atypical ventricular tachycardia, proarrhythmia, and drug-induced ventricular tachycardia, supplemented by pertinent references (dating back to 1964) from the reviewed articles and by personal communications with researchers involved in this field.
Study Selection: Ninety-three articles were identified describing at least one case of polymorphic ventricular tachycardia (with gender specified) associated with quinidine, procainamide hydrochloride, disopyramide, amiodarone, sotalol hydrochloride, bepridil hydrochloride, or prenylamine.
Episodes of ventricular tachycardia of the 'torsade de pointes' (VTTP) types provoked by prenylamine were observed in 7 patients: 5 females and 2 males. They all received prenylamine in a dose of 120-180 mg daily for anginal pains. Syncope or syncopal equivalents occurred in all 7 patients.
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