Marked variability of systolic heart murmur associated with idiopathic hypertrophic subaortic stenosis.
D002312:Cardiomyopathy, Hypertrophic / Q000175:diagnosis* / Q000503:physiopathology; D004452:Echocardiography; D006326:Heart Auscultation; D006801:Humans; D007545:Isoproterenol; D008297:Male; D008875:Middle Aged; D010701:Phonocardiography
D007545:Isoproterenol