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2013, Number 1

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Rev Cubana Cardiol Cir Cardiovasc 2013; 19 (1)

Idiopathic ventricular fibrillation

López DA, Dorantes SM

Language: Spanish
References: 25
Page: 5-12
PDF size: 472.95 Kb.


ABSTRACT

Introduction Idiopathic ventricular fibrillation is associated with a high risk of sudden cardiac death in young and otherwise healthy adults. The overall survival rate of patients with cardiac arrest is low, estimated to be 5% and victims can not be identified before events.
Objective The aims of the study were: characterize these patients and subsequent follow-up after therapeutic intervention.
Method Thirty three patients without known heart disease (22 men, 11 women; mean age 39 years) were studied after being resuscitated from recurrent episodes of idiopathic ventricular fibrillation; 30 had received a defibrillator (3 refused it). Other causes of sudden death were excluded.
Results The 69,7% of cases had premonitory electric signs (most frequents: ventricular premature complexes and T wave anomalies). These signs allow group stratification but are not equally useful for individual risk. Ventricular fibrillation recurrences occurred in 81,8% (electric storms occurred in four patients), sometimes the arrhythmias were autolimited and only three of twenty were inducible at electrical stimulation. Antiarrhythmic drugs were required in: electric storms, recurrences of ventricular arrhythmia, supraventricular events and in three patients that refused the defibrillator. No deaths were reported during follow-up.
Conclusion Recurrences and premonitory signs are frequents and individual risk stratification of malignant arrhythmias is very difficult, with low inducibility of them during electrophysiological testing.


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