Second heart sound in normal subjects.
D000293:Adolescent; D000328:Adult; D000367:Age Factors; D000368:Aged; D002648:Child; D002675:Child, Preschool; D006321:Heart / Q000502:physiology; D006801:Humans; D007223:Infant; D008875:Middle Aged; D008943:Mitral Valve / Q000502:physiology; D010701:Phonocardiography; D011664:Pulmonary Valve / Q000502:physiology; D012119:Respiration