Angina pectoris - or simply angina - is chest pain or discomfort that keeps coming back. It happens when some part of your heart does not get enough blood and oxygen.

Angina pectoris - or simply angina - is chest pain or discomfort that keeps coming back. It happens when some part of your heart does not get enough blood and oxygen.

An anomalous coronary artery (ACA) is a heart defect. This is something your baby is born with (congenital). In ACA, the blood vessels that supply blood to your child’s heart muscle aren’t normal.

Aortic stenosis means that your child has a heart valve that is too narrow or is blocked. The aortic valve is 1 of 4 heart valves that keep blood flowing through the heart. The valves make sure blood flows in only one direction. The ...

Aortic valve regurgitation is when a person's aortic valve leaks. The aortic valve is one of the heart's 4 valves. These valves help the blood flow through the heart and out to the body. Normally, the aortic valve stops blood from ...

An arrhythmia is an abnormal heart rhythm that can cause problems with the contractions of your heart chambers.

An arrhythmia is an abnormal rhythm of the heart. In an arrhythmia, abnormal electrical signals through the heart muscle may cause the heart to beat too fast (tachycardia), too slow (bradycardia), or irregularly.

Arrhythmogenic right ventricular dysplasia (or ARVD) is a disease of the heart muscle. In this disease, fatty fibrous tissue replaces normal heart muscle. This interrupts normal electrical signals in the heart and may cause irregular and...

Atherosclerosis is a type of thickening or hardening of the arteries caused by a buildup of plaque in the inner lining of an artery. It can increase your risk of heart attack, stroke, and other circulatory conditions.

Atrial fibrillation, or AFib, is a kind of abnormal heart rhythm or arrhythmia. AFib increases the risk for blood clots. These clots can then travel to the brain, causing a stroke . This is why AFib significantly increases the risk for ...

Atrial flutter is an abnormal heart rhythm that causes the atria to beat more quickly than they should.

Bacterial endocarditis is a bacterial infection of the inner layer of the heart or the heart valves. The heart has 4 valves. These valves help the blood flow through the heart and out to the body. When a person has bacterial ...

Bacterial endocarditis is an infection of the lining of the heart (endocardium), and the heart valves. It does not happen very often, but when it does, it can cause serious heart damage.

Bicuspid aortic valve is a type of abnormality in the aortic valve in the heart. In bicuspid aortic valve, the valve has only two small parts, called leaflets, instead of the normal three. This condition is present from birth. It often ...

Brugada syndrome is a genetic disorder that causes an irregular heartbeat. This rare, but life threatening condition is more common in people of Asian descent.

A bundle branch block is an interruption of the electrical pathways inside the wall of the heart. A block in the right bundle branch can occur in people who otherwise seem normal. If it happens with a heart attack, it can be a sign of ...

Cardiac sarcoma is a rare type of cancerous tumor that occurs in the heart.

Cardiac tamponade happens when extra fluid builds up in the space around the heart. This fluid puts pressure on the heart and prevents it from pumping well.

Catecholaminergic polymorphic ventricular tachycardia, or CPVT, is a rare genetic condition. It causes an irregular heart rhythm that can be life threatening. It often shows up in childhood. The first sign is often fainting or near ...

Coarctation of the aorta is a heart defect that is present at birth (congenital). It means the aorta is narrower than it should be. Read on to learn details about the condition.

A person with coronary heart disease has an accumulation of fatty deposits in the coronary arteries. These deposits narrow the arteries and can decrease or block the flow of blood to the heart.

Dilated cardiomyopathy, or DCM, is when the heart chambers stretch and become thin. It often starts in the left ventricle. As the disease gets worse, it may spread to the right ventricle and to the atria. As the muscle stretches, it ...

Detailed information about double outlet right ventricle (DORV), a heart malformation that is present from birth.

Eisenmenger syndrome is an advanced form of

A heart attack happens when the blood supply is cut off from the heart muscle, usually because of a blood clot. Without blood and oxygen, the muscle cells are damaged and die.

When you have heart block, there is interference with the electrical signals that usually move from the top chambers of your heart to the bottom chambers, telling your heart when to beat.

Heart failure is a condition in which the heart cannot pump enough blood to meet the body's needs.

Heart failure is when the heart can't pump enough blood to the body. In children, it is often caused by a congenital heart defect.

Heart murmurs may be caused by a number of factors or diseases, including defective heart valves, fever, and pregnancy.

Heart murmurs are extra or unusual sounds made by blood moving through the heart. Many children have heart murmurs. Some cause no problems or go away over time. Others require treatment.