When we look at heart disease sometimes we don't realize how it effects our bodies. I know alot about this topic. I was born with a heart defect and am always told no caffeine .well the curiosity in me got the best of me. Energy drinks are not good for u if u have heart disease. I know it sounds silly. When I drank one long time ago my face turned beat red and felt like I couldn't breathe. I know we all have different types of heart disease and always consult your doctor.