Task: Answer Verification
Input (English): Question: Does hypercoagulability affecting early vein graft patency exist after off-pump coronary artery bypass?
Answer: OPCAB is not associated with a significant activation in postoperative platelet function. This study suggests that if hypercoagulability exists after OPCAB, it is not involved in the pathogenesis of arterial thrombotic events such as early bypass graft failure.
Output (English): no