A dangerous heart rate for an adult is generally considered to be above 100 beats per minute (bpm) at rest or less than 60 bpm at rest. However, it is important to note that what is considered a dangerous heart rate can vary depending on the individuals age, activity levels, and overall health. For example, a well-trained athlete may have a resting heart rate in the 40s, which is not necessarily dangerous for them.

Certain underlying conditions are typically the true decider of what a “dangerous” heart rate is. If you’re already living with heart disease, heart failure, or a history of heart disease and notice a fluctuation in your heart rate, you should go to the doctor as soon as you can, as it could be a sign of a serious complication.

It is important to monitor your heart rate and seek medical attention if you experience any concerning symptoms, such as chest pain, shortness of breath, or dizziness. Additionally, if you are taking medication that affects your heart rate, you should consult with your doctor to determine what is a safe and healthy heart rate for you.