Anomalous Origin of the Left Thyrocervical Trunk as a Cause of Residual Pain after Myocardial Revascularization with Internal Mammary Artery

Abstract A patient with successful implantation of an internal mammary artery graft in the left anterior descending coronary artery complained of residual but different anginal pain after operation. Ischemia was demonstrated during a manual stress test. Angiography revealed anomalous origin of the thyrocervical trunk from the internal mammary artery. Angina and ischemia disappeared after the trunk was ligated.