Heart disease is used to describe problems with the heart, the arteries that supply blood, or the valves that keep the blood flowing in the right direction.
There are many types of heart problems. Some are caused by unhealthy habits, like smoking. Some viruses can cause damage and sometimes babies are born with a defect in a heart valve.
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- KidsHealth: Heart Disease Article answers what it is, how you get it, what the signs are and if kids can get it.