Coronary heart disease is serious. You should be drinking alot of water. I believe heart attacks are caused by serious dehydration. That's my two cents. I'm not a doctor. I don't believe scientists have never found any connection to mj and heart disease. Studies have shown mj can be protective and help alot of conditons glaucoma, muscle spams and others. Mj is a vasodialator. This is key!. It actually opens up the blood vessels, temporarily. This is why you get red eyes.