Heart palpitations are common but they can be unnerving if you’re not sure what they mean. To find out why they happen and ...

There are some conditions, such as thyroid disease, that can affect how fast your heart beats, Dr. Singh says. “For people with an overactive thyroid, called hyperthyroidism, the excess amount ...

A skipped heart beat is usually nothing to worry about ... If you experience the sensation of a fluttering, rapid, or pounding heart, know that most people won’t need treatment.

There's a lot of variation to how fast your heart beats in a day; whether you're sitting at a desk, walking to the store, or running on a treadmill, your heart responds to different energy ...

During a recent episode of the podcast "SmartLess," Will Arnett said co-host Sean Hayes was admitted into hospital twice in ...

A new study led by Emmanuel Mossoux confirms that a supermassive black hole at the heart of the Milky Way ... other large black holes that rotate so fast that they bend space.