What are the intraoperative imaging techniques used to assess coronary artery bypass graft patency?
The intraoperative imaging techniques used to assess coronary artery bypass graft patency include angiography, ultrasound, and magnetic resonance imaging (MRI). Angiography is the gold standard for evaluating the patency of a bypass graft, providing detailed information about the presence of a graft, its location, and its patency. Ultrasound is used to evaluate the intima-media thickness of the graft wall, as well as to detect any aneurysms or calcifications. MRI can be used to detect presence of a graft, its location, and its patency, as well as to evaluate the wall thickness of the graft. Additionally, MRI can detect any aneurysms, calcifications, or stenoses.