This case involves a 50-year-old female patient with no significant past medical history aside from a mitral valve heart defect that needed to be repaired surgically. The surgeon opted to use a new annuloplasty Myxo Ring, Edwards Lifesciences Model 5100 before it was FDA approved. During the procedure, the surgeon sutured and obstructed the patient’s circumflex artery. As a result, the patient experienced several rounds of V-fib and had to be cardioverted 4 times. An immediate post op EKG showed ST elevations in leads II, III and aVF with depressions in the reciprocal leads. The obstruction was never diagnosed and the acute cardiac event resulted in severe LV damage. The surgeon did not recognize, diagnose or treat the AMI, and instead sent her home with a diagnosis that she had cardiac stunning from a potassium deficiency. The patient’s long-standing cardiologist finally revealed the heart damage and the patient was given an ICD and is now on a breadth of cardiac medications.