The heart is the body's hardest-working muscle. Whether you're awake or asleep, or exercising or resting, your heart is always at work. It pumps blood through arteries to deliver oxygen to organs and ...

The human heart, often described as the body's engine, is a remarkable organ that tirelessly beats to keep us alive. At the core of this vital organ, intricate processes occur when it contracts, where ...

Atrial tachycardia is an unusually fast heartbeat that originates in the atria, or upper chambers, of the heart. It is a type of supraventricular tachycardia (SVT). This means it begins above the ...

BIRMINGHAM, Ala. – Millions of adults have atrial fibrillation — an irregular beating of the upper chambers of the heart that yields increased risk of heart failure, stroke and death. Many genetic ...

Atrial tachycardia is an abnormal heart rhythm where the top chambers in your heart beat quicker than usual. During an atrial tachycardia episode, your heart rate may exceed 100 beats per minute (bpm) ...