the Link Between Hypothyroidism and Heart Rate Issues

Hypertension and hypothyroidism?

I would like to consult a doctor regarding my condition.
I have hypothyroidism and experienced unexplained high blood pressure and rapid heart rate two to three days ago, which occurred twice.
I was unsure why this happened, but I stabilized after visiting the emergency room.
Last night, while sleeping, I noticed my heart rate slowed down, and my body temperature was very low, with my heart beating four times and then pausing, which caused significant panic.
I went to the emergency room again, where an ECG showed a blood pressure of 98 and a heart rate of 59.
I am currently taking Dronedarone for my heart rhythm.

On April 18, I visited the emergency room for the first time after taking medication for gynecological issues that help with blood circulation, which led to sudden palpitations and a sharp drop in body temperature.
Upon arrival, an ECG indicated normal sinus rhythm but a rapid heart rate.
Since then, I have experienced palpitations two to three times daily.
I later consulted a cardiologist and had an X-ray, which showed no abnormalities.
I have also undergone a 24-hour Holter monitor test, and I am waiting for the report on May 12.

The doctor mentioned that only a small number of malignant arrhythmias pose a lethal risk, but I often feel weak and fatigued due to my hypothyroidism, with symptoms like alternating chills and heat, coughing, and low body temperature during palpitations.
I am frequently unhappy because of my heart rate issues.
I need to wait for the thyroid report and the 24-hour Holter monitor report on May 12 to know the results.

What should I do?

You-Chen, 30~39 year old female. Ask Date: 2020/05/03

Dr. He Dongjin reply Cardiology

Hello, don't think too much about it.
Just wait for the thyroid report and the 24-hour ECG report to come out tomorrow, and then discuss it with your attending physician.
Don't worry, Changhua Hospital cares about you.

Reply Date: 2020/05/03

More Info

Hypothyroidism, or an underactive thyroid, can significantly impact various bodily functions, including heart rate and blood pressure regulation. The symptoms you are experiencing, such as episodes of rapid heart rate (tachycardia) followed by slow heart rate (bradycardia), can be linked to your thyroid condition. Let's break down the relationship between hypothyroidism and heart rate issues, as well as address your concerns.

Understanding Hypothyroidism and Heart Rate
1. Thyroid Hormones and Heart Function: The thyroid gland produces hormones that are crucial for regulating metabolism, energy levels, and overall cardiovascular health. When thyroid hormone levels are low, as in hypothyroidism, the heart may not function optimally. This can lead to a slower heart rate (bradycardia) and decreased cardiac output.

2. Hormonal Fluctuations: Your episodes of high blood pressure and rapid heart rate could be a response to stress or anxiety, which can be exacerbated by hypothyroidism. The body may react to low thyroid hormone levels by increasing heart rate to compensate for decreased metabolic activity. Conversely, when your body is in a state of rest or low activity, the heart rate may slow down significantly.

3. Medication Effects: You mentioned taking "達生心律錠" (likely a beta-blocker or similar medication). These medications can help manage heart rate but may also contribute to fluctuations in heart rate depending on your thyroid hormone levels. If your thyroid levels are not adequately managed, it can lead to inconsistent heart rate responses.

4. Temperature Regulation: Hypothyroidism often leads to sensitivity to temperature changes, which you noted in your symptoms. The thyroid plays a role in thermoregulation, and a low body temperature can be associated with bradycardia. When your body temperature drops, it can slow down metabolic processes, including heart rate.

Recommendations for Managing Your Symptoms
1. Thyroid Management: It is crucial to ensure that your thyroid hormone levels are adequately managed. Regular monitoring of TSH (Thyroid Stimulating Hormone) and free T4 levels is essential. If your levels are not within the normal range, your physician may need to adjust your medication dosage.

2. Monitoring Heart Rate: Continue to monitor your heart rate and blood pressure regularly. If you experience significant fluctuations or symptoms such as dizziness, chest pain, or severe fatigue, seek medical attention promptly.

3. Lifestyle Modifications: Incorporate lifestyle changes that can help stabilize your heart rate and overall well-being. This includes:
- Stress Management: Engage in relaxation techniques such as deep breathing, meditation, or yoga to help manage anxiety and stress.

- Regular Exercise: Light to moderate exercise can help improve cardiovascular health and stabilize heart rate. However, consult your physician before starting any new exercise regimen.

- Dietary Considerations: A balanced diet rich in nutrients can support thyroid function. Ensure you are getting adequate iodine, selenium, and zinc, which are important for thyroid health.

4. Follow-Up Care: Since you are awaiting results from your 24-hour Holter monitor and thyroid tests, it is essential to follow up with your healthcare provider to discuss the results and any necessary adjustments to your treatment plan.

5. Emergency Preparedness: Given your history of acute episodes, it may be wise to have a plan in place for emergencies. This could include knowing when to seek immediate medical attention and having a list of your medications and medical history readily available.

Conclusion
Your symptoms of fluctuating heart rates and blood pressure are likely interconnected with your hypothyroidism. It is essential to work closely with your healthcare provider to manage your thyroid levels and monitor your cardiovascular health. With appropriate treatment and lifestyle adjustments, you can improve your quality of life and reduce the impact of these symptoms on your daily activities. Remember, you are not alone in this, and seeking support from healthcare professionals is crucial in managing your condition effectively.

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