What are the findings of the study by Velazquez et al. (2016) on coronary-artery bypass surgery in patients with ischemic cardiomyopathy?
The study by Velazquez et al. (2016) on coronary-artery bypass surgery in patients with ischemic cardiomyopathy found that the mortality rates at 30 days and 1 year after the surgery were not significantly different between those who received the bypass surgery and those who did not. Furthermore, the bypass surgery did not have any significant effect on the patients' left ventricular ejection fraction, functional class, or quality of life. These findings suggest that coronary-artery bypass surgery may not be necessary for patients with ischemic cardiomyopathy.  