Low Heart Rate: Is 47 BPM a Cause for Concern?

Heartbeat

I would like to ask, during a recent insurance medical examination, the nurse measured my pulse and found it to be 47 beats per minute, while the normal rate is around 72 beats per minute.
What could be the issue, doctor? The nurse asked if I engage in regular exercise, and I replied that I do dance.

Xia, 10~19 year old female. Ask Date: 2012/01/04

Dr. He Dongjin reply Cardiology

Hello, a slow heart rate is not necessarily a disease.
People who exercise regularly may have a lower heart rate.
For example, former tennis champion Stefan Edberg had a heart rate of only 29 beats per minute, while the average is around 72 beats per minute.
If there are no discomforting symptoms, it is sufficient to just monitor the situation.
Changhua Hospital cares about you.

Reply Date: 2012/01/04

More Info

A heart rate of 47 beats per minute (BPM) is considered bradycardia, which is defined as a resting heart rate that is slower than the normal range of 60 to 100 BPM. While bradycardia can be a cause for concern, it is essential to consider the context in which it occurs. In your case, you mentioned that you engage in regular physical activity, specifically dancing. This is a crucial factor to consider.

Athletes and individuals who are physically fit often have lower resting heart rates due to their heart's increased efficiency and stronger muscle tone. For instance, elite athletes may have resting heart rates that fall below 60 BPM, and some may even experience rates in the 40s or lower without any adverse effects. This phenomenon is known as "athletic bradycardia." If you are physically active and do not experience any symptoms such as dizziness, fatigue, or fainting, your low heart rate may simply be a reflection of your fitness level rather than a medical issue.

However, it is essential to monitor your heart rate and be aware of any accompanying symptoms. Bradycardia can be concerning if it is associated with symptoms like:
1. Dizziness or Lightheadedness: If you feel faint or dizzy, it could indicate that your heart is not pumping enough blood to meet your body's needs.

2. Fatigue: Unusual tiredness can be a sign that your heart is not functioning optimally.

3. Shortness of Breath: Difficulty breathing during normal activities may suggest that your heart is not supplying enough oxygenated blood.

4. Chest Pain: Any chest discomfort should be taken seriously and warrants immediate medical attention.

Given your situation, it would be prudent to follow up with a healthcare provider, especially if you notice any of the symptoms mentioned above. They may recommend further evaluation, such as an electrocardiogram (ECG) or a Holter monitor, to assess your heart's rhythm over a more extended period.

In addition to the heart rate, it is also essential to consider other factors that could contribute to bradycardia, such as:
- Medications: Some medications, particularly those used to treat high blood pressure or heart conditions, can slow the heart rate.

- Electrolyte Imbalances: Abnormal levels of potassium or calcium can affect heart rhythm.

- Underlying Health Conditions: Conditions such as hypothyroidism or heart disease can lead to bradycardia.

In summary, while a heart rate of 47 BPM can be concerning, it is not inherently problematic if you are physically active and asymptomatic. However, it is essential to remain vigilant and consult with a healthcare professional to ensure that there are no underlying issues that need to be addressed. Regular check-ups and monitoring your heart health are vital components of maintaining overall well-being, especially if you have a history of heart-related concerns.

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