Studies on protodiastolic and presystolic waves in cardiac cycles.
D000293:Adolescent; D000328:Adult; D000368:Aged; D001450:Ballistocardiography; D001775:Blood Circulation / Q000502:physiology*; D002648:Child; D005260:Female; D006321:Heart / Q000502:physiology*; D006801:Humans; D008297:Male; D008875:Middle Aged; D010701:Phonocardiography