Have you ever experienced a sudden increase in heart rate while sitting, lying in bed or even during a calm moment at work? The feeling can be unsettling as it often comes without warning or a clear ...

Many people have felt their heart suddenly beat very fast, skip a beat, or flutter for a few seconds. This feeling is called ...

Does climbing a flight of stairs make you feel a sudden adrenaline rush? For some, this feeling quickly fades away. For others, a heart beating faster than usual can be worrying, leaving them ...