Pre-excitation as a cause of appearance and increased intensity of systolic murmurs.
D000328:Adult; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D008944:Mitral Valve Insufficiency; D010701:Phonocardiography; D014262:Tricuspid Valve Insufficiency; D014927:Wolff-Parkinson-White Syndrome