Giornale italiano di cardiologia
-
A case of acute poisoning caused by an overdose of flecainide (1.5 gr. per os), taken in order to commit suicide, is described here. With a plasmatic concentration of 5000 ng/ml the drug induced a soporose condition, shallow breathing with phases of apnea and intermittent muscular clonuses, a clinical picture of shock with a idioventricular rhythm at a rate of 40/min. and widening of the QRS (400 msec.). The infusion of orciprenaline and 5% glucose solution induced an increase in the ventricular frequency and the normalization of the circulatory condition. ⋯ Highest therapeutic level of flecainide was reached 48 hours after ingestion. The stimulation threshold during the acute phase was 1.8 mA and came down 1.3 mA after wash-out. The outcome was favourable.
-
The acute electrophysiologic effects and therapeutic efficacy of intravenous and oral flecainide were assessed in 18 patients with recurrent supraventricular tachyarrhythmias, resistant to conventional antiarrhythmic agents. They were 22 to 76 years old (mean 50). Twelve patients underwent electrophysiologic study for the investigation of tachyarrhythmias. ⋯ After intravenous flecainide therapy, reentrant SVT was non inducible in the patients of group I and in 4 patients of group II. Flecainide was successful in the acute termination of 100% of automatic supraventricular tachycardia and 75% of fibrillation. The patients with atrial flutter developed a faster ventricular rate.(ABSTRACT TRUNCATED AT 250 WORDS)