Left main (LM) coronary artery disease, arbitrarily defined as >50% diameter stenosis of the LM coronary artery, has long been a topic of intense diagnostic and therapeutic investigation, due to its poor prognosis. As the majority of the left ventricular myocardium is supplied by the LM stem, any ischemic insult may lead to hemodynamic compromise, significant ventricular arrhythmias or death
