Injury or distortion of the circumflex coronary artery can occur during mitral valve surgery, due to its proximity to the mitral valve annulus. We present the case of a 72-year-old male patient with symptomatic mitral regurgitation, who underwent minimally invasive mitral valve surgery. The initial reparative gesture was complicated by intraoperative infarct due to a distortion of the circumflex artery (CX) caused by the rigidity of the ring used; the mainstay of the treatment was the removal of the previous device implanted in favor of a flexible one with restitutio ad integrum of the CX patency. K E Y W O R D S annuloplasty devices, circumflex artery, mitral valve repair | CARUSO ET AL.