Phonocardiographic changes in mitral stenosis before and after valvulotomy: A correlation with mitral valve size

• Sherman M. Steinzeig, Sheldon T. Pinsky, Mariano M. Alimurung, E.Grey Dimond

• American Heart Journal, May 1957, Elsevier
• DOI: 10.1016/0002-8703(57)90341-1