Flecainide acetate in atrial flutter and fibrillation. The arrhythmogenic effects
Sihm, I.; Hansen, F.A.; Rasmussen, J.; Pedersen, A.K.; Thygesen, K.
European Heart Journal 11(2): 145-148
1990
ISSN/ISBN: 0195-668X PMID: 2107078 Document Number: 356150
The arrhythmogenic effects of flecainide in atrial fibrillation and flutter were assessed in a consecutive material of 100 patients without severe heart failure (NYHA class I or II). Severe arrhythmogenic events occurred in 9% (4-16%) of the patients: within the first 5 days of treatment in seven patients, and in two patients after 60 and 240 days of flecainide treatment. Patients with proarrhythmic events tended to be older and to have a longer QRS duration. Following flecainide therapy conversion to sinus rhythm was achieved in 21 of 43 patients (49%) with atrial fibrillation and in 10 of 29 (34%) with atrial flutter. It is concluded that flecainide, although an effective antiarrhythmic drug, has potential proarrhythmic effects and therefore cautious use of this drug is mandatory.