Noninvasive in vivo and in vitro study of the St. Jude mitral valve prosthesis. Evaluation using two dimensional and M mode echocardiography, phonocardiography and cinefluoroscopy
Am J Cardiol. 1982 Apr 1;49(5):11101-9.
doi: 10.1016/0002-9149(82)90033-9.