On the question of obstruction in idiopathic hypertrophic subaortic stenosis.
D006328:Cardiac Catheterization; D006332:Cardiomegaly / Q000175:diagnosis; D002312:Cardiomyopathy, Hypertrophic / Q000175:diagnosis*; D003937:Diagnosis, Differential; D006352:Heart Ventricles; D006439:Hemodynamics; D006801:Humans