Your heart rate may change during a heart attack, although it may also not change at all.

Certain types of right coronary artery infarctions can affect the electrical systems of the heart and cause a slow heart rate during an attack.

In addition, if you are taking medications that slow your heart rate, such as beta-blockers, your heart rate may remain at this lower pace during a heart attack.

By contrast, if you have tachycardia, which is when your heart beats abnormally fast, your heart rate may stay high during an attack.

Your heart rate is the number of times your heart beats per minute. A typical or “healthy” resting heart rate for an adult is between 60 and 100 beats per minute. In general, the lower your heart rate, the more efficiently your heart is pumping.

Your heart rate at the time of treatment can be an indicator of how well you will recover from an attack. For example, a study found that people with a heart rate above 80 beats per minute at the time of treatment had a higher risk of dying from their heart attack.

However, having a fast heart rate is not always a sign or symptom of a heart attack, according to the American Heart Association.

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