Since its introduction, Bentall procedure has remained the standard of care for management of ascending aortic aneurysms with associated aortic valve pathologies. It involves replacement of aortic root, ascending aorta and the aortic valve, using a hybrid vascular graft with built in valves. The openings of the main coronary arteries are then rejoined with the graft. The procedure has satisfactory long term survival rate. However, there are some complications including graft infection, stroke from dislodged plaques and coronary insufficiency due to kinking of the reconnected main coronary arteries. Here, we report a rare and life-threatening complication following Bentall procedure. A 76-year-old female developed left main stenosis following Bentall procedure, successfully treated with percutaneous coronary intervention (PCI). We discuss various etiologies and treatment options for this complication. We recommend routine surveillance with coronary angiography at six months post Bentall.