Women and men experience similar rates of dangerous complications after a major heart surgery. So why are women dying at higher rates than men when these complications strike? Advertisement That's the main question raised by a new study that involved more than 850,000 cases of Medicare beneficiaries who underwent high-risk heart surgeries. These operations included heart bypass, aortic aneurysm repairs, and mitral and aortic valve repairs. All were conducted between 2015 and 2020. Related