An inconstant loud murmur.
D003937:Diagnosis, Differential; D005260:Female; D006326:Heart Auscultation; D006333:Heart Failure / Q000209:etiology; D006338:Heart Neoplasms / Q000150:complications / Q000175:diagnosis*; D006801:Humans; D007231:Infant, Newborn; D008297:Male; D008946:Mitral Valve Stenosis / Q000175:diagnosis* / Q000209:etiology; D011247:Pregnancy; D012207:Rhabdomyoma / Q000150:complications / Q000175:diagnosis*