1. Echocardiographic Features of Flail Aortic Porcine Valve
Mohsin Alam, M.D., Sidney Goldstein, M.D. 
CHEST 
Volume 78, Issue 1, Pages (July 1980)
DOI: /chest
Copyright © 1980 The American College of Chest Physicians Terms and Conditions

2. FIGURE 1
M-mode echocardiogram of flail aortic porcine valve showing diastolic fluttering of the cusps (C). The lower panel is an enlarged view of the porcine valve depicting fluttering cusp echoes. AR = aortic root; C = cusps; LA = left atrium; S = stents.
CHEST  , DOI: ( /chest )
Copyright © 1980 The American College of Chest Physicians Terms and Conditions