Amplitude/frequency differences in single-lead ECG of normal versus coronary heart diseased males.
A resting "normal" ECG can coexist with known coronary heart disease (CHD). Combined sensitivity and specificity errors of at least 10% in exercise ECGs are not unusual. Improved screening for CHD was attempted using amplitude/frequency analysis of ECG recordings. Thirty normal males and 30 with documented CHD were selected. The ECGs were recorded on electromagnetic tape during supine rest. Analysis provided digital conversion, selection of four ECG segments, time-normalization and amplitude/frequency analysis. Analyses provided one digital, plot per each segment and one per each 30-subject average. The results from one ECG lead are presented. Significant differences (p less than or equal to 0.05) appeared in the comparisons between the normal and CHD groups. Retrospectively, amplitude criteria individually screened normal from CHD males to an improved degree compared with exercise ECGs.
D000328:Adult; D003327:Coronary Disease / Q000175:diagnosis / Q000503:physiopathology*; D004562:Electrocardiography; D055590:Electromagnetic Phenomena; D005080:Exercise Test; D006801:Humans; D008297:Male; D010808:Physical Examination / Q000592:standards