title: Systolic preejection period.
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D004562:Electrocardiography; D005260:Female; D006321:Heart / Q000502:physiology / Q000503:physiopathology*; D006331:Heart Diseases / Q000503:physiopathology*; D006339:Heart Rate; D006352:Heart Ventricles / Q000503:physiopathology; D006801:Humans; D008297:Male; D008875:Middle Aged; D010701:Phonocardiography; D011674:Pulse; D012737:Sex Factors