Abnormal signal-averaged electrocardiograms in patients with nonischemic congestive cardiomyopathy: relationship to sustained ventricular tachyarrhythmias.
- 1 December 1985
- journal article
- research article
- Published by Wolters Kluwer Health in Circulation
- Vol. 72 (6), 1308-1313
- https://doi.org/10.1161/01.cir.72.6.1308
Abstract
We assessed whether signal-averaged electrocardiography could identify patients with sustained ventricular arrhythmias in 41 patients with non-ischemic cardiomyopathy. Twelve of these patients presented with sustained ventricular arrhythmia and 29 patients had no history of sustained ventricular arrhythmias. The mean ejection fractions in the groups were 30 +/- 9% and 24 +/- 9%, respectively. Results were compared with signal-averaged electrocardiograms in 55 normal individuals. The filtered QRS duration was longest in patients with sustained ventricular arrhythmias (130.2 +/- 19.5 vs 105.0 +/- 13.1 msec in the group without sustained ventricular arrhythmia, p less than .001 and 95.9 +/- 9.1 in the normal group, p less than .001). The voltage in the last 40 msec of the filtered QRS was lower in the sustained ventricular arrhythmia group (11.3 +/- 9.3 microV) than the group without sustained ventricular arrhythmia (53.5 +/- 28.3 microV; p less than .001) or the normal group (53.7 +/- 25.2 microV; p less than .001). Eighty-three percent of patients in the sustained ventricular arrhythmia group had an abnormal signal-averaged electrocardiogram characterized by both a long filtered QRS duration and a late potential of low voltage level; only 2% of normal subjects and 14% of patients without sustained ventricular arrhythmias had an abnormal signal-averaged electrocardiogram. The signal-averaged electrocardiogram can identify patients with nonischemic congestive cardiomyopathy and sustained ventricular arrhythmias.This publication has 13 references indexed in Scilit:
- Extensive endocardial mapping during sinus rhythm and ventricular tachycardia in a patient with arrhythmogenic right ventricular dysplasiaJournal of the American College of Cardiology, 1984
- Intraventricular Wenckebach conduction and localized reentry in a case of right ventricular dysplasia with recurrent ventricular tachycardiaJournal of the American College of Cardiology, 1983
- Prognosis in severe heart failure: Relation to hemodynamic measurements and ventricular ectopic activityJournal of the American College of Cardiology, 1983
- Relation between late potentials on the body surface and directly recorded fragmented electrograms in patients with ventricular tachycardiaThe American Journal of Cardiology, 1983
- Two-dimensional echocardiographic measurement of left ventricular ejection fraction: Prospective analysis of what constitutes an adequate determinationAmerican Heart Journal, 1982
- Surgical treatment of life-threatening ventricular arrhythmias: The role of intraoperative mapping and consideration of the presently available surgical techniquesProgress in Cardiovascular Diseases, 1981
- Die Bedeutung von Nachpotentialen innerhalb des ST-Segmentes im Oberflächen-EKG bei Patienten mit koronarer HerzkrankheitDeutsche Medizinische Wochenschrift (1946), 1980
- Recording from the body surface of arrhythmogenic ventricular activity during the S-T segmentThe American Journal of Cardiology, 1978
- Slow Conduction and Reentry in the Ventricular Conducting SystemCirculation Research, 1972