HARISIOS BOUDOULAS, M.D.; STEPHANOS DERVENAGAS, M.D.; STEPHEN F. SCHAAL, M.D.; RICHARD P. LEWIS, M.D.; GEORGE DALAMANGAS, M.D.
The characteristics of premature ventricular beats predisposing to ventricular tachycardia or fibrillation were assessed by 24-h ambulatory monitoring and maximal treadmill exercise testing in 339 cardiac patients with premature ventricular beats. Premature ventricular beats were divided into early (Q-premature ventricular beat < QT), late (within the last 20% of the cardiac cycle), and midcycle. Ventricular tachycardia was recorded in 45 patients and ventricular fibrillation, in three. The frequency of ventricular tachycardia or fibrillation was 32% in patients with late, 16% in patients with early, and 7% in patients with midcycle premature ventricular beats (P < 0.05). Patients with frequent (> 10/min) multiformed premature ventricular beats had a frequency of ventricular tachycardia or fibrillation of 44%, while only 13% of patients with frequent uniformed premature ventricular beats had ventricular tachycardia (P < 0.05). Ambulatory patients with ventricular tachycardia or fibrillation have frequent multiformed premature ventricular beats, and the ventricular tachycardia or fibrillation is usually triggered by late premature ventricular beats.
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BOUDOULAS H, DERVENAGAS S, SCHAAL SF, LEWIS RP, DALAMANGAS G. Malignant Premature Ventricular Beats in Ambulatory Patients. Ann Intern Med. 1979;91:723–726. doi: 10.7326/0003-4819-91-5-723
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Published: Ann Intern Med. 1979;91(5):723-726.
Cardiology, Rhythm Disorders and Devices.
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Print ISSN: 0003-4819 | Online ISSN: 1539-3704
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