Orthogonal factors of cardiac intervals and their response to stress.
D001794:Blood Pressure; D004562:Electrocardiography; D006339:Heart Rate; D006801:Humans; D008297:Male; D008875:Middle Aged; D010701:Phonocardiography; D005082:Physical Exertion; D013315:Stress, Psychological; D016276:Ventricular Function