A fast heartbeat can be caused by emotions like stress or anxiety. Dehydration, or drinking caffeine or other stimulants, can ...

You know the feeling. When you first see your crush and your head starts spinning, your palms get sweaty, and your heart begins beating a mile a minute. Is this love? Or is it … an arrhythmia? The ...

A heart that beats too fast can leave you lightheaded, dizzy, out of breath or feeling fatigued.

Monomorphic ventricular tachycardia is an irregular heartbeat where the bottom chambers of your heart beat quicker than usual. It can cause symptoms such as shortness of breath, dizziness, or fatigue.

DEAR MAYO CLINIC: When I go for a walk or to the gym, people always seem to be checking their pulse, whether by hand or with a wearable. Why is heart rate so important? ANSWER: Your heart rate, or ...

Arrhythmia puts you at greater risk of potentially life threatening complications affecting your heart, brain, and lungs. An arrhythmia is an abnormal heartbeat that beats too fast, slow, or ...

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 ...

Cardiovascular exercise, also called cardio or aerobic exercise, keeps you and your heart healthy. This specific type of exercise gets your heart rate up and your heart beating faster for several ...