Heart Rate Issues: Is a Slow Heartbeat Normal? - Cardiology

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A slow heartbeat, or bradycardia, is defined as a resting heart rate of fewer than 60 beats per minute. While it can be normal for some individuals, particularly athletes or those who are physically fit, it can also indicate underlying health issues, especially if accompanied by symptoms such as fatigue, dizziness, or chest pain. In your case, you mentioned that your heart rate has been consistently between 55-60 beats per minute since you started taking a medication called 康肯 (likely a beta-blocker), and you are concerned about whether this is abnormal.

Firstly, it is essential to understand that heart rate can vary significantly from person to person. Factors such as age, fitness level, and even the time of day can influence heart rate. For instance, athletes often have lower resting heart rates due to their enhanced cardiovascular efficiency. However, a sudden change in heart rate, particularly if it drops significantly or if you experience symptoms, warrants further investigation.

In your case, the fact that your heart rate has dropped from a previous range of 80-90 beats per minute to 55-60 beats per minute after starting a new medication is noteworthy. Beta-blockers, like the one you mentioned, are commonly prescribed to manage conditions such as hypertension and anxiety. They work by slowing down the heart rate and reducing the heart's workload. While this can be beneficial for many patients, it can lead to bradycardia in some individuals, especially if the dosage is too high or if the patient has other underlying conditions affecting heart rate.

You also mentioned an ejection fraction (EF) of 54%. Ejection fraction is a measurement of the percentage of blood leaving your heart each time it contracts. A normal EF ranges from 55% to 70%, so an EF of 54% is slightly below normal. This could indicate some degree of heart dysfunction. When combined with a low heart rate, it raises the question of whether your heart is adequately pumping blood to meet your body's needs.

If you are experiencing symptoms such as fatigue, dizziness, or chest pain, it is crucial to consult with a healthcare professional. They may recommend further tests, such as a 24-hour Holter monitor, to assess your heart's rhythm over an extended period. This can help determine if your bradycardia is a benign finding or if it requires intervention.

In summary, while a slow heart rate can be normal for some individuals, the context of your symptoms, medication use, and ejection fraction suggests that this is a situation that should be closely monitored. It is advisable to follow up with your healthcare provider to discuss your concerns and possibly adjust your medication or conduct further evaluations to ensure your heart health is being appropriately managed. Regular monitoring and open communication with your healthcare team are key to addressing any potential issues related to heart rate and overall cardiovascular health.