PMID: 3745706Sep 1, 1986Paper

Classification by type of ventricular arrhythmia predicts frequency of adverse cardiac events from flecainide

Journal of the American College of Cardiology
J MorganrothG D Gentzkow

Abstract

Antiarrhythmic therapy is known to be associated with a significant risk of adverse cardiac reactions, including a proarrhythmic response. This study assessed in 1,330 patients followed up for 292 +/- 393 days the predictive value for cardiovascular safety of a system by which patients were classified according to ventricular arrhythmias on entry, presence or absence of organic heart disease and drug dose for flecainide acetate. Baseline arrhythmia subgroups included patients with premature ventricular complexes only, nonsustained ventricular tachycardia, and sustained ventricular tachycardia. Proarrhythmic events occurred in 6.8% of patients overall and were serious in 2.3% and lethal in 1.0%. However, proarrhythmia was highly dependent on arrhythmia class on entry: serious nonlethal proarrhythmic events occurred in 6.6% of patients with sustained ventricular tachycardia, only 0.9% with nonsustained ventricular tachycardia and 0% with premature ventricular complexes (p less than 0.01). Proarrhythmic death occurred in 3.1% of patients with sustained ventricular tachycardia, 0.2% with nonsustained ventricular tachycardia and 0% with premature ventricular complexes only (p less than 0.01). Proarrhythmia was also influenced by the...Continue Reading

Citations

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