Heart Disease Medical Reference

A MUGA scan is a test that shows how much blood your heart pumps with each heartbeat. Learn about how it works, what happens during the test, and more.

Learn what an aortobifemoral bypass is, why you might need one, and more.

Learn about agonal breathing and discover what to do when it happens.

If you have a bundle branch block, it may cause a glitch in the electrical impulses that make your heart beat.

Learn what subacute bacterial endocarditis is, what causes it, and how it's treated.

Learn more about the different types of tests that can help your doctor diagnose a heart condition.

Heart palpitations can happen for many reasons. Learn how to know when a fluttering or pounding heart is an emergency.

Heart beating too fast? It could be atrioventricular reentrant tachycardia (AVRT), a condition caused by an extra connection between the upper and lower chambers of your heart. Find out what causes it and how to treat it.

Get the facts on a heart rhythm condition called catecholaminergic polymorphic ventricular tachycardia (CPVT), including its causes, diagnosis, and treatment.

Stokes-Adams syndrome is a condition where you suddenly feel faint and can lose consciousness. It’s caused by a change in your heart rate.

In a normal heart rhythm, your heartbeat is steady and even. But sometimes, an extra heartbeat can disrupt the rhythm. A pattern of three beats is called trigeminy, and it happens in many healthy people.

Paroxysmal supraventricular tachycardia is when the upper chambers of your heart has a faster than average heart rate. Learn more about this condition and its treatment.

Junctional tachycardia occurs when your heart rate is faster than normal due to an issue in the upper and lower heart chambers. Learn about this condition and its treatment today.

Does your heart seem to beat fast for no reason? You might have inappropriate sinus tachycardia. Learn more about this condition and when to get treatment.

Find out what might trigger an ectopic beat -- also called an early, missed, or extra heartbeat -- and how you can treat it.

Learn what happens when an electric signal gets delayed or stopped as it travels from one chamber of your heart to another -- and find out how to treat it.

Asystole, also known as the most serious form of cardiac arrest, is when your heart stops beating or when you flatline. Learn what causes this condition and if it can be reversed.

Ventricular fibrillation, or V-fib, stops your heart from pumping blood the way it should. It can be deadly if you don’t get treatment right away. Learn more about the symptoms, causes, risk factors, diagnosis, treatment, complications, and prevention of ventricular fibrillation.

A transesophageal echocardiogram, or TEE, is like an ultrasound of your heart taken from the inside. Find out how this test works, its risks, and how to prepare.

Your resting heart rate is key to your overall health and well-being. Learn why a lower heart rate is important for your health and ways to lower your heart rate.

Get started today on these ways to keep your heart healthy. They will help prevent heart disease in the years to come.

What are the best ways to know what your blood pressure and cholesterol levels are? How often should you do this? And can you take these tests at home? Get the facts.

With LQTS, your heart takes longer to recharge after each beat, and symptoms can be scary. But your doctor can help.

Medicines can prevent you from having another heart attack, but they do have risks. Find out which side effects each heart drug causes, and how to manage them.

One of the most common heart defects in babies is a PDA, or patent ductus arteriosus. It sounds scary, but it can be fixed. Learn what you need to know to choose the best treatment.