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.

Anomalous coronary artery intervention is a type of procedure to correct a problem with the coronary artery. Read on to learn more about this procedure.

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 ...

A minimally invasive aortic valve replacement is a surgery to replace a badly working aortic valve with an artificial valve. The aortic valve is one of the heart's four valves. The valves help blood flow through the heart's 4 chambers ...

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 fibrillation ablation is a procedure to treat atrial fibrillation. It uses small burns or freezes to cause some scarring on the inside of the heart to help break up the electrical signals that cause irregular heartbeats. This can ...

The Maze procedure is a type of heart surgery to treat atrial fibrillation.

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. Read on to learn about the cause, symptoms, diagnosis, and treatment.

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 ...

A biventricular assist device (BiVAD) is an implantable pump designed to help your heart function better when both sides of your heart are failing.

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 ...

In cardiac catheterization (often called cardiac cath), a very small hollow tube, or catheter, is advanced from a blood vessel in the groin or arm through the aorta into the heart. Once it is in place, several diagnostic and treatment ...

Cardiac resynchronization therapy (CRT) is a type of treatment to help correct serious heart rhythm problems. It involves placing a device under your skin that is connected to the heart's ventricles. The device sends electrical signals ...

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 ...

This procedure guides a tube into your heart to destroy small areas of heart tissue that may be causing your abnormal heartbeat.

Cardioversion is a procedure used to return an abnormal heartbeat to a normal rhythm. This procedure is used when the heart is beating very fast or irregular. This is called an arrhythmia. In chemical cardioversion, medicines are used to...

A chest ultrasound is an imaging test that uses sound waves to look at the structures and organs in your chest. It can help your healthcare provider see how well your lungs and heart are working.

A chest X-ray is an imaging test that uses X-rays to look at the structures and organs in your chest. It can help your healthcare provider see how well your lungs and heart are working. Certain heart problems can cause changes in your ...