Why Does Thyroid Cancer Cause a Slow Heart Rate?

Thyroid Cancer is a malignant tumor originating from thyroid follicular epithelium or parafollicular cells, which is the most common malignant tumor in the head and neck region. It can cause patients to experience slow heartbeat, with common causes including anesthesia medication effects, insufficient thyroid hormone secretion, increased cardiac burden, myocarditis, and heart disease. Here are the details:

1. Anesthesia medication effects: Patients with thyroid cancer require general anesthesia during surgery. Anesthesia medication may affect the myocardial contractility of patients, leading to slow heartbeat. In this case, sedative drugs such as diazepam can be used under the guidance of a doctor.

2. Insufficient thyroid hormone secretion: Thyroid hormone maintains the excitability and contractility of the myocardium. If patients have insufficient thyroid hormone secretion, they may also experience slow heartbeat. In this case, thyroid hormone supplements such as levothyroxine sodium tablets need to be used under the guidance of a doctor.

3. Increased cardiac burden: If thyroid cancer patients have heart diseases such as coronary heart disease, it will lead to increased cardiac burden and may also cause slow heartbeat. In this case, cardiac stimulant drugs such as digoxin tablets need to be used under the guidance of a doctor.

4. Myocarditis: If thyroid cancer patients have myocarditis, it may lead to weakened myocardial contractility and slow heartbeat. In this case, myocardial nutrition drugs such as coenzyme Q10 capsules can be used under the guidance of a doctor.

5. Heart disease: If thyroid cancer patients have heart diseases such as coronary heart disease, it will also lead to weakened heart function and slow heartbeat. In this case, drugs such as aspirin enteric-coated tablets and isosorbide mononitrate sustained-release tablets can be used under the guidance of a doctor.

In addition to the above reasons, thyroid cancer patients may experience this symptom due to other comorbidities, such as taking antidepressant drugs. It is recommended that patients promptly visit the hospital for diagnosis through tests such as thyroid function, blood routine, and electrocardiogram.