Tachycardia occurs when the heart beats faster than 100 beats per minute. It can occur as a normal response to exercise, fever, stress, or other stimuli. Tachycardia that occurs abruptly and without a clear cause, or when the heart rate increases out of proportion for a given activity is considered abnormal.
Atrial fibrillation is a heart rhythm problem that causes irregular heartbeat (arrhythmia) and abnormal blood flow.
An occasional extra heartbeat that temporarily changes the heart's regular rhythm. The extra heartbeat originates in one of the heart's lower chambers.
An occasional extra heartbeat that disrupts the heart's normal rhythm. This type of extra heartbeat begins in one of the upper chambers of the heart.
A type of abnormal heart rhythm in which the heart beats too quickly.
A malfunction in the heart's electrical system that causes the heart to beat slower than it should.
Coronary artery disease is a buildup of cholesterol or plaque that causes arteries to stiffen, narrow, and restrict blood flow. Learn about symptoms and treatment.
Buildup of plaque in the arteries, causing them to narrow and stiffen and leading to reduced blood flow.
Sudden cardiac arrest occurs when the heart stops pumping, and is a leading cause of death in the United States. Learn about symptoms and treatment.
Hypercholesterolemia is a condition where the body has unusually high level of fats in the blood. Learn about symptoms and treatment.