Tachycardia is a rapid heart rate that beats faster than 100 beats per minute for any reason. It can occur as a result of many acute and chronic conditions. Factors such as age, health conditions, and ...

Knowing how to spot the symptoms of cardiac arrest or a heart attack and what to do could save someone's life.

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 ...

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