Hibernating myocardium is a condition where a part of the heart muscle has difficulty contracting due to reduced blood flow. It can occur over days, months, or years, and can be reversed with revascularization.

With permission from the patient to post, this video shows the left ventricle of the heart before and after successful coronary artery bypass surgery —in a 65-year-old man who presented with worsening chest pain and shortness of breath. An intraoperative TEE (trans-esophageal echocardiogram) was performed at the outset of the operation and repeated at the completion of his double arterial bypass graft surgery.