
Is a heart rate of 121 dangerous?
When I felt chest tightness, I counted my heartbeats and found it was around 121 beats per minute. Is a heart rate of 121 normal? Is it dangerous?

In adults, a heart rate exceeding 121 beats per minute is considered tachycardia, while the normal resting heart rate for adults generally ranges between 60 and 100 beats per minute.
The occurrence of tachycardia can be triggered by various non-pathological factors, including but not limited to excessive fatigue, anxiety, heavy work pressure, and nervous system dysfunction. In such cases, the heart rate often naturally returns to the normal range through adequate rest and self-regulation, and does not pose a direct threat to health.
If the heart rate remains consistently above the normal range and is accompanied by severe symptoms such as chest pain, fainting, or difficulty breathing, it may indicate heart disease or other health problems, and immediate medical attention is recommended.
In addition, an elevated heart rate may also result from pathological factors such as severe anemia, infection, high fever, or hyperthyroidism. Effective treatment of these underlying causes often helps restore the heart rate to normal. If concerns persist, it is advisable to consult a physician.