When my mechanical aortic valve was inserted, my natural valve had been severely stenotic due to calcium. I have been on one statin or another for cholesterol management for almost 30 years, and have been an insulin dependent diabetic for 24 years, and my surgeon said that the combination of statins and insulin were now thought to cause calcification.
The male side of my family has a long history of heart disease, with my father dying at age 54 in 1990, and in the 1980s he lost two brothers, aged 34 and 40, all from heart attacks. And yet my brother, who takes after my mother's side of the family more, has no cholesterol or diabetes issues. Genetics, huh.