Early nonejection systolic clicks.
D000328:Adult; D000368:Aged; D004562:Electrocardiography; D005260:Female; D006326:Heart Auscultation; D006349:Heart Valve Diseases / Q000175:diagnosis*; D006801:Humans; D008297:Male; D008875:Middle Aged; D008943:Mitral Valve; D010701:Phonocardiography