What is a dangerous heart rhythm? A look at normal ranges for adults.

  • A dangerous heart rate is when the heart beats too slowly (bradycardia) or too fast (tachycardia).
  • According to the American Heart Association, an adult’s heartbeat is too slow when it is below 60 bpm, and too fast when it is above 100 bpm.
  • Some factors that affect heart rate include stress, hormones, medication, activity levels and anxiety, according to the American Heart Association.

A quick way to get your heart rate up is to do some form of cardiovascular exercise, like jogging. But at certain times, the rate at which your heart beats can become dangerous.

Your heart rate is measured by how many times your heart beats per minute, called “BPM”. Human heart rate usually decreases during sleep (resting heart rate) and increases when exercising.

Other factors that affect your heart rate include stress, hormones, medication, activity levels and anxiety, according to the American Heart Association. Each age has a target heart rate range.

What is a dangerous heart rhythm?

Heart rate becomes a concern when the heart beats too slowly (bradycardia) or too fast (tachycardia).

According to the American Heart Association, an adult’s heartbeat can be too slow when it is below 60 bpm, and too fast when it exceeds 100 bpm. But slower and faster heart rates aren’t always worrisome. Your heart rate will increase during exercise and could drop to less than 60 bpm when, for example, you are sleeping.

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