{TAIL ~ A prosthetic heart valve} is provided that includes an orifice ring adapted to carry {HEAD ~ blood} therethrough 
{ TAIL ~ A prosthetic heart valve } is provided that includes an orifice ring adapted to carry { HEAD ~ blood } therethrough
TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH