forty-one patients undergoing aortocoronary bypass surgery were divided into two groups : an `` '' unclamped '' '' group ( 17 patients ) in whom the aorta was not cross-clamped during operation and a `` '' clamped '' '' group ( 24 patients ) in whom the ascending aorta was cross-clamped during performance of distal anastomoses .
C0003483
e aor
C0003956
ascending a