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 ...

It's a common yet uncomfortable sensation when the heart beats rapidly for a second or two and then becomes normal. Whether it occurs when one is resting, after going up the stairs, or even while ...

SVT results in the heart beating at much faster rate than normal, and can be triggered by exercise, lack of sleep, dehydration, and more. When the human body is exerted during physical activities such ...