[Assessment of the diagnostic significance of R wave amplitude changes in patients with ischemic heart disease in computer-assisted monitoring analysis of ECG during treadmill test].
During treadmill exercise, 57 patients with documented coronary heart disease (CHD) were studied for the change patterns in R wave amplitudes in V5 lead by analyzing ECG on a computer. With exercise, 86% of CHD patients showed higher or no R wave amplitude changes, whereas 73.7% of healthy subjects displayed its lower changes. Increased or no R wave amplitude changes in CHD patients was accompanied by more marked quantitative ischemic parameters than their decrease. A significant correlation was found between higher R wave amplitude and extended exercise-induced myocardial ischemia. Decreased R wave amplitude was associated with local ischemic shifts. Comparison of the data obtained from the computer-assisted ECG analysis and radiocardiometric findings during the exercise test demonstrated that an increase m R wave amplitude in CHD patients was followed by higher cardiac volume, which indicated ischemic myocardial dysfunction.
Lezhava
M G
MG
Khvichiia
N Ia
NIa
Iosava
K V
KV
D000328:Adult; D003327:Coronary Disease / Q000175:diagnosis*; D003936:Diagnosis, Computer-Assisted; D004562:Electrocardiography; D015716:Electrocardiography, Ambulatory; D005080:Exercise Test; D006801:Humans; D008297:Male; D008875:Middle Aged
Otsenka diagnosticheskogo znacheniia izmeneniĭ amplitudy zubtsa R u bol'nykh ishemicheskoĭ bolezn'iu serdtsa pri monitorno-kompiuternom analize EKG vo vremia proby na tredmile.