What were the findings of the Coronary Artery Surgery Study (CASS) Registry?
The Coronary Artery Surgery Study (CASS) Registry found that long-term survival of medically treated patients was significantly better than those who chose to undergo revascularization. The study also showed that patients with severe ischemia and one- or two-vessel coronary artery disease had improved long-term outcomes with revascularization compared to medical therapy alone. Additionally, the results indicated that patients with impaired left ventricular function also had better outcomes with revascularization.  