This document discusses potential intraoperative issues that can occur during or after mitral valve repair surgery. It notes that the circumflex coronary artery is often very close to the mitral valve annulus and can be inadvertently injured by sutures or ring annuloplasty. A prospective echocardiography study identified 3 patients who experienced circumflex injury during minimally invasive mitral valve repair, including 1 with ECG changes and 2 requiring coronary intervention. The document emphasizes that surgeons must be aware of the variable position of the circumflex artery and should check for signs of injury before closing the chest. It also discusses how systolic anterior motion (SAM) of the mitral valve can occasionally occur after repair due to an unders