Key points are not available for this paper at this time.
HUFNAGEL, CHARLES A. M.D.; VILLEGAS, PAULO DIAZ M.D.; NAHAS, HECTOR M.D. Author Information
Hufnagel et al. (1958) studied this question. New types of aortic valvular prostheses were evaluated in early clinical experiences, though specific outcomes are not detailed in the provided abstract.