You should have your sugar levels checked, triglycerides (blood fats), cholesterol, HDL, LDL and their ratios, blood pressure, and cardiac inflammation through a crp test. Resting heart rate is another heart health indicator. The stronger the heart muscle the slower it is at rest. Many people with high blood pressure do flush red, not all.
It might be a silent killer but many times the signs are ignored or not noticed. I know a guy that would get exhausted walking on a treadmill at a good clip quickly. His response was look a me I lift heavy weights. I'm just not an endurance athlete. I would say having no endurance for this guy was an indicator because he had a heart attack lifting weights. There are basically two types of heart attacks. Simplistically speaking there is a clog or an electrical short.
Testosterone replacement law suits are flying now because a study has shown they increase the risk of heart attacks. They are unsure of the mechanism but some speculate it thickens the blood. If this is true imagine the increased risk taking recreational bodybuilding amounts especially if you are in your 40's or 50's?