What affect does heart disease have on the heart?

One could be like my father's to where the heart cannot produce enough blood for the circulation of the body. A way to get this disease is smoking and/or drinking or even if it runs in your family you could get it. If you have it a good way to make it stronger is to eat healthier, exercise, and get rest do not strain yourself; when you take your pain medication lay down, take it easy for an hour or two.