1. Ultrasound localization of left ventricular outflow obstruction in hypertrophic obstructive cardiomyopathy;Shah, P.M.; Gramiak, R.; Kramer, D.H.;Circulation
2. Role of echocardiography in diagnostic and hemodynamic assessment of hypertrophic subaortic stenosis;Shah, P.M.; Gramiak, R.; Adelman, A.G.; Wigle, E.D.;Circulation,1971
3. Echocardiographic assessment of the effects of surgery and propranolol on the dynamics of outflow obstruction in hypertrophic subaortic stenosis;Shah, P.M.; Gramiak, R.; Adelman, A.G.; Wigle, E.D.;Circulation,1972
4. Ultrasound in the diagnosis and evaluation of idiopathic hypertrophic subaortic stenosis;Popp, R.L.; Harrison, D.C.;Circulation
5. Echocardiographic measurement of the left ventricular outflow gradient in idiopathic hypertrophic subaortic stenosis;Henry, W.L.; Clark, C.E.; Glancy, D.L.; Epstein, S.E.;N Engl J Med,1973