The effects of exercise on late potentials

Author

Constantinides, S. ; Maglaveras, N. ; Litos, A. ; Ekklisiarchos, D. ; Pappas, C. ; Tsikotis, A.

Author_Institution

Cardiologic Inst. of Northern Greece, Pylea, Greece

fYear

1991

fDate

23-26 Sep 1991

Firstpage

29

Lastpage

32

Abstract

The effects of exercise on late potential (LP) development were studied on twelve normal patients and nineteen patients with chronic coronary heart disease (CHD). The parameters studied were the QRS duration (QRS), the duration of signals having potential less than 40 μmV (DUR LAS), and root mean square of the potentials in the last 40 ms of the QRS complex (RMS-40). The conclusions were: (1) QRS reduction, RMS-40 increase, and DUR LAS reduction in normal patients could be attributed to the augmented sympathetic drive and the homogeneity of the normal myocardial depolarization; (2) the opposite changes that were observed in CHD patients could be attributed to ventricular conduction delay related to pathological lesions and physiopathologic disturbances due to ischemia; and (3) post-exercise LPs appearing for the first time on CHD patients could be precursors of malignant ventricular arrythmias

Keywords

bioelectric potentials; electrocardiography; 40 ms; QRS duration; chronic coronary heart disease; exercise effects; ischemia; late potentials; malignant ventricular arrythmias; normal myocardial depolarization; normal patients; pathological lesions; physiopathologic disturbances; signal duration; Cardiac disease; Cardiology; Delay; Electrocardiography; Ischemic pain; Myocardium; Noise level; Pathology; Protocols; Root mean square;

fLanguage

English

Publisher

ieee

Conference_Titel

Computers in Cardiology 1991, Proceedings.

Conference_Location

Venice

Print_ISBN

0-8186-2485-X

Type

conf

DOI

10.1109/CIC.1991.169037

Filename

169037