What causes the heart to beat normally for several times and then suddenly have an extra beat? What should be done about it?

The heart normally beats several times and then suddenly has an extra beat, which may be caused by conditions such as hypertension, hyperthyroidism, or myocarditis. Symptoms can be improved with medication. Detailed analysis is as follows:

1. Hypertension

Patients with hypertension often experience prolonged vasoconstriction and increased cardiac workload, which can lead to excessive contraction of the heart muscle and result in premature beats. Under a doctor's guidance, patients may take medications such as furosemide tablets or enalapril maleate tablets.

2. Hyperthyroidism

Hyperthyroidism is a condition caused by excessive secretion of thyroid hormones. These hormones increase metabolism and enhance cardiac contraction, leading to overexcitation of the heart muscle and changes in heartbeat. Under medical supervision, patients may be treated with medications such as propylthiouracil enteric-coated capsules or methimazole tablets.

3. Myocarditis

Myocarditis causes damage to the heart muscle tissue and reduced cardiac function, leading to arrhythmias and symptoms such as rapid heartbeat and difficulty breathing. Under a doctor’s guidance, patients may use medications such as amiodarone hydrochloride tablets or furosemide tablets to alleviate local symptoms.

Besides the above causes, this phenomenon may also result from heart valve disease, pulmonary heart disease, or acute myocardial infarction. Daily lifestyle adjustments—including proper rest, avoiding excessive fatigue, and maintaining a healthy diet—are also important and can help improve symptoms.