Low Heart Rate: When to Seek Medical Advice

Heart rate below 60 beats per minute?

Hello Doctor: My average heart rate is around 55 beats per minute, and sometimes it drops below 50 beats per minute (as measured by my fitness tracker).
Besides feeling extremely fatigued every day, I don't have any other significant discomfort.
Regarding medication, I am not taking any chronic disease medications, but I do take one tablet each of Liyou and Keqianping before bed.
In terms of exercise, I hardly do any, haha XD.
I underwent catheter ablation for supraventricular tachycardia over a year ago.
I would like to ask if my current situation requires further examination.
Thank you!

SL, 50~59 year old female. Ask Date: 2023/06/05

Dr. Li Shengkai reply Cardiology

A normal heart rate is about 60 to 100 beats per minute.
A heart rate that is too slow can cause symptoms such as weakness, fatigue, and dizziness.
Your discomfort may be due to bradycardia.
If the condition persists, it is advisable to visit a hospital for an evaluation.
Common tests include an electrocardiogram (ECG), thyroid function tests, and electrolyte levels, among others.

Reply Date: 2023/06/05

More Info

When it comes to understanding low heart rates, also known as bradycardia, it is essential to consider various factors, including the individual's overall health, symptoms, and any underlying medical conditions. A resting heart rate of 55 beats per minute (bpm) or lower can be normal for some individuals, particularly athletes or those who are physically fit. However, for others, especially those who do not engage in regular physical activity, a heart rate below 60 bpm may warrant further investigation.

In your case, you mentioned that your average heart rate is around 55 bpm, occasionally dipping below 50 bpm, and that you experience significant fatigue. While you do not report any other specific symptoms, the fatigue you describe could be related to your low heart rate. Bradycardia can lead to insufficient blood flow to the body's organs, which may result in feelings of weakness, dizziness, or fatigue. It is important to note that even if you do not feel unwell, the combination of a low heart rate and persistent fatigue is a signal that further evaluation may be necessary.

Given your medical history of supraventricular tachycardia (SVT) and the treatment you underwent, it is prudent to consult with a healthcare professional. They may recommend a thorough evaluation, which could include an electrocardiogram (ECG or EKG), blood tests to check thyroid function and electrolyte levels, and possibly a Holter monitor to assess your heart rate variability over a longer period. These tests can help determine whether your bradycardia is a benign condition or if it is indicative of an underlying issue that requires treatment.

Additionally, you mentioned that you are not currently taking any chronic medications, but you do take medications for anxiety and seizures. It is important to discuss these medications with your healthcare provider, as some medications can influence heart rate. For example, certain anti-anxiety medications and anticonvulsants may have side effects that affect heart rhythm.

Lifestyle factors also play a significant role in heart health. Since you indicated that you do not engage in regular exercise, incorporating physical activity into your routine could be beneficial. Regular exercise can help improve cardiovascular fitness and may positively influence heart rate. Even moderate activities, such as walking, can make a difference.

In summary, while a heart rate of 55 bpm may be normal for some individuals, the presence of fatigue and your medical history suggests that it would be wise to seek medical advice. A healthcare provider can help assess your condition, determine if any further tests are needed, and provide guidance on lifestyle modifications that may improve your overall heart health. Remember, it is always better to err on the side of caution when it comes to matters of the heart.

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