Here's a fast, easy-to-understand guide to the symptoms of each type of heart disease.

If you or a loved one has heart disease, when must you call the doctor? When should you head for the emergency room? Click here for clear, fast information.

Don't wait, click here for heart attack warning signs. For easy reference, you'll also find stroke and cardiac arrest warning signs -- and no-nonsense advice on what to do now. This link will take you to the American Heart Association.

Women are more likely than men to have a heart attack without chest pain. Read more data on gender-specific heart disease. This link takes you to another web site.

Doctors call it angina pectoris. You call it chest pain. It may feel like indigestion -- or like an elephant just stepped on your chest. Here's what it means.

Coronary artery disease is America's No.1 killer, affecting more than 13 million Americans.

View this illustrative guide to coronary artery disease.

You know there's nothing funny about a heart attack. There's a lot more to learn. Here's what you need to know: no more, no less.

Irregular heart rhythm -- arrhythmia -- is when your heart doesn't keep up a good beat. Learn what it means here.

It's the most common kind of irregular heart beat. Here's where to find out what it is, and what to do about it.

Irregular heart rhythms can cause the pumping function of the heart to fail. See how.

You may not know what a heart valve is -- until it stops working right. It's a common form of heart disease. Here's an illustrated guide.

This congenital heart defect is often seen in premature babies. Fortunately the abnormal opening between major heart vessels is readily treatable. Read more. 

This is the cause of half of all heart disease deaths. Find out why here.

Not everyone gets heart disease. Some are born with it. Here are the facts on congenital heart disease.

Heart muscle disease -- what doctors call cardiomyopathy -- is as serious as it sounds. Here's a brief overview.

Symptoms of DC --dilated cardiomyopathy -- can appear at any age. Learn to recognize them here.

HCM -- hypertrophic cardiomyopathy -- is a thickening of the walls of the heart. Here's a brief overview.

Restrictive cardiomyopathy is the rarest form of heart-muscle disease. Here's an overview.

Did you know that your heart is held by a little sac? That sac -- the pericardium -- can get infected. It's called pericarditis or pericardial disease. Here's more.

Fluid around the heart can be caused by various types of infection/inflammation or cancer, kidney disease or heart surgery. This fluid can impair heart function. Read more in this technical article written for doctors.

This inherited genetic defect weakens connective tissues -- including those in the heart. Click here to learn more.