What does a heart rate of 90 beats/min mean?

If the heart rate exceeds 100 beats

per minute, it is usually tachycardia, which

may be related to strenuous exercise, hyperthyroidism and other reasons. If the heart rate is lower than 60 beats per minute, it is bradycardia, which is usually caused by anemia, hypotension and other reasons.

If the body is at rest, the heart rate is lower than or higher than the normal value, it is necessary to go to the cardiovascular department of the hospital for medical examination as soon as possible.