[Duration and structure of the cardiac contraction cycle].
D000293:Adolescent; D000328:Adult; D004562:Electrocardiography; D005260:Female; D006321:Heart / Q000502:physiology*; D006339:Heart Rate; D006801:Humans; D008297:Male; D008875:Middle Aged; D010701:Phonocardiography
Dlitel'nost' i struktura tsikla serdechnogo sokrashcheniia.