PHOENIX, July 11 (Phoenix Times Online) — For most adults, a resting heart rate between 60 and 100 beats per minute is considered normal, according to the American Heart Association, Cleveland Clinic, Harvard Health, Yale Medicine and the British Heart Foundation. A pulse that stays above 100 at rest is usually called tachycardia, or a fast heart rate.
That does not mean every fast pulse is an emergency. Harvard Health says clinicians usually do not worry unless the rate is consistently above 100 beats per minute at rest, and Cleveland Clinic says a temporary rise can happen with stress or anxiety. But a resting pulse that keeps running high can be a clue that something else is going on.
What can cause a fast resting pulse?
The American Heart Association says a fast resting heart rate can be linked to heart conditions, including heart disease and heart muscle damage related to heart attack or heart failure. It also lists nonheart causes such as anemia, dehydration, chronic lung disease, severe bleeding, caffeine and an overactive thyroid.
Other medical groups list similar triggers. Harvard Health and Cleveland Clinic say fever, infection, anxiety, poor physical conditioning, pregnancy and some medications can also raise resting heart rate. The British Heart Foundation also points to infection, anemia and overactive thyroid as common causes.
What symptoms can come with it?
Yale Medicine cardiologist Srijan Shrestha, MD, says a person may feel palpitations, shortness of breath, dizziness or lightheadedness. He also says some people have no symptoms at all.
How should someone check a resting pulse?
Yale Medicine says a resting pulse can be checked at the wrist, inside the elbow, neck or top of the foot. It can be counted for 15 seconds and multiplied by four. If the pulse seems irregular, Yale Medicine says count for 30 seconds and multiply by two, or count for a full minute.
When should it be discussed with a doctor?
A rate that stays above 100 at rest is worth asking about, especially if there is no obvious reason such as exercise, caffeine or a stressful moment. Henry Ford Health quotes cardiologist Dr. Keteyian as saying, “If you have an RHR above 100 or below 50 that can’t be explained by obvious factors, such as participation in a regular exercise program, you should see a doctor.”
Yale Medicine says doctors often focus on the underlying cause. For example, anemia may be treated with iron, and hyperthyroidism may be treated with medication.
The main takeaway is simple: a resting heart rate is most useful when it is seen as a pattern, not a single number. A pulse that is repeatedly high at rest does not automatically mean a serious problem, but it is the kind of change doctors say should not be ignored.
