Bradycardia, a slower than normal heart rate, can cause the heart to pump too little oxygen-rich blood to the body.

Bundle branch block

Bundle branch block is a disorder that affects the electrical impulses traveling to your heart. It may be a sign of underlying heart disease.


Cardiomyopathy is a heart muscle disease. Treatment options depend on what type of cardiomyopathy you have.

Chagas disease

Chagas disease, a condition caused by a parasite, usually is transmitted to humans through feces of the infected triatomine bug.

Enlarged heart

Enlarged heart is often a sign of a serious heart condition. Find out causes and treatments for enlarged heart.

Heart arrhythmias

A heart arrhythmia is an abnormal heart rhythm. Arrhythmias can be a byproduct of damage to the heart from disease or age.

Heart disease

Heart disease, usually thought of as blockages in the arteries that can cause a heart attack, can describe any medical condition affecting your heart.

Heart failure

Heart failure means your heart can't efficiently pump blood throughout your body. Medications, and sometimes devices or surgery, can help you manage this condition.

Hypertrophic cardiomyopathy

Hypertrophic cardiomyopathy is a genetic disorder in which heart muscle becomes abnormally thick. It's the most common cause of sudden cardiac death in young people.

Long QT syndrome

Long QT syndrome is an electrical disturbance that can cause sudden, rapid heart rates. It can be genetic or a side effect of medication.

Multiple system atrophy (MSA)

Multiple system atrophy is a rare degenerative disorder that affects the brain and central nervous system, and is characterized by significant decreases in blood pressure.

Sick sinus syndrome

Sick sinus syndrome is the name for a group of heart rhythm problems in which the heart's natural pacemaker isn't working properly.


Tachycardia, a rapid heart rate, is caused by an abnormality in your heart's electrical impulses. Tachycardia can cause serious complications, including sudden cardiac arrest.

Apr. 10, 2013