Harling et al. [1] had a motivating article about surgical patch angioplasty of the left main coronary artery (LMCA). They gave a comprehensive and up-dated review of the issue including the different surgical methods and the variety of patch materials used so far: pericardium, saphenous vein, internal thoracic artery and pulmonary artery. However, they also stated that the optimal patch graft ...