Thyroid disorders include hyperthyroidism, hypothyroidism, thyroiditis, etc. The heart symptoms caused by each of these causes are different. 1. Hyperthyroidism: Hyperthyroidism is caused by an overactive thyroid gland, which can lead to heart symptoms such as rapid heartbeat, atrial pre-systole and atrial fibrillation. In addition, hyperthyroidism can also lead to cardiac symptoms such as panic and palpitations (rapid heartbeat, often accompanied by panic). 2. Hypothyroidism: Hypothyroidism is mainly caused by autoimmune diseases, medications and other factors, and patients may experience slow heart rate. 3. Thyroiditis: Thyroiditis is caused by autoimmune diseases, viral infections, and other factors, and may lead to palpitations (rapid heartbeat, often accompanied by panic), tachycardia, and other cardiac symptoms. Thyroid diseases also include thyroid cysts, thyroid cancer, etc. Different diseases cause different cardiac symptoms, so patients should consult a doctor in a timely manner and follow the doctor’s instructions for treatment.