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[Ventricular arrhythmias in obstructive hypertrophic cardiomyopathy. Continuous electrocardiographic study]
Presse Medicale (Paris, France : 1983)
|October 1, 1983
Summary
Ventricular arrhythmias are common in hypertrophic obstructive cardiomyopathy (HOC) patients. High-dose propranolol did not reduce arrhythmias, challenging its role in preventing sudden cardiac death in HOC.
Area of Science:
- Cardiology
- Electrophysiology
Context:
- Hypertrophic obstructive cardiomyopathy (HOC) is linked to sudden cardiac death, often due to ventricular arrhythmias.
- Understanding arrhythmia prevalence and triggers is crucial for patient management.
Purpose:
- To assess the prevalence of ventricular arrhythmias in HOC patients.
- To evaluate the effect of high-dose propranolol on these arrhythmias.
Summary:
- 24-h ECGs in 27 HOC patients revealed 96% had ventricular arrhythmias, with 55% experiencing repetitive forms.
- Severe arrhythmias correlated with syncope, age, and ventricular pressures.
- Propranolol (≥320 mg/day) did not alter arrhythmia frequency, contrary to some prior studies.
Impact:
- Findings suggest high-dose propranolol may not directly reduce ventricular arrhythmias in HOC.
- Beta-blockers' protective effect might involve preventing arrhythmia progression to ventricular fibrillation rather than elimination.