1. Should patients with pure mitral stenosis undergo cardiac catheterization?;Motro, M.; Neufeld, H.N.;Am J Cardiol,1980
2. Improved results of closed commissurotomy for mitral stenosis using ultracardiography as selection ground;Dernevik, L.; Brorsson, L.; Wallentin, I.; William-Olsson, G.;Acta Med Scand,1981
3. Valve replacement without preoperative cardiac catheterization;MGStJ, Sutton; MStJ, Sutton; P, Oldershaw;N EnglJ Med,1981
4. Echocardiography;Feigenbaum, H.,1981
5. The study of left ventricular function from digitized echocardiograms;Upton, M.T.; Gibson, D.G.;Prog Cardiovasc Dis,1978