More specifically, the present invention relates to {HEAD ~ heart valve prostheses} which have a sewing cuff and which have {TAIL ~ a valve body} that is rotatable relative to the sewing cuff 
More specifically , the present invention relates to { HEAD ~ heart valve prostheses } which have a sewing cuff and which have { TAIL ~ a valve body } that is rotatable relative to the sewing cuff
OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH