[Non-invasive detection of late potentials of ventricular activation: identification and significance in coronary disease].
Using a high-amplification electrocardiograph with signal averaging, an attempt has been made to determine the prevalence of delayed potentials of ventricular activation (DPVA) in coronary heart disease (CHD) and their relation to ventricular tachycardia and/or fibrillation (VT/VF). No DPVA could be recorded in normal subjects (n = 25) or in patients with various cardiopathies with VT/VF but without CHD (n = 10). DPVA have been recorded only in patients with CHD (n = 50) (all patients having undergone ventriculography and coronarography). The prevalence of DPVA is 12.5% without VT/VF, 50% with VT/VF, and 80% when these arrhythmias are associated with the presence of a ventricular aneurysm. The duration of the DPVA is also important, since it is only in the group with VT/VF and with aneurysm that the R-EVEA duration (interval between the peak of the R wave and the end of electrical ventricular activity) exceeds 100 ms. DPVA disappeared in all the cases after aneurysmectomy. The DPVA, when of long duration, can be considered a hallmark of serious ventricular arrhythmias in patients with CHD and a ventricular aneurysm.
D000200:Action Potentials; D000293:Adolescent; D000328:Adult; D000368:Aged; D002648:Child; D002675:Child, Preschool; D003327:Coronary Disease / Q000175:diagnosis / Q000503:physiopathology*; D004562:Electrocardiography; D006352:Heart Ventricles / Q000503:physiopathology; D006801:Humans; D008875:Middle Aged
Détection non invasive des potentiels tardifs de l'activation ventriculaire: identification et signification dans la maladie coronarienne.