What causes premature heartbeats?

Premature ventricular contractions (PVCs) are a type of arrhythmia characterized by extra heartbeats occurring earlier than normal within the regular heartbeat rhythm, usually caused by abnormal excitation of cardiac pacemaker cells. Potential causes include structural heart abnormalities, heart disease, electrolyte imbalances, adverse drug reactions, and others. Patients are advised to seek timely medical evaluation. Doctors will determine the underlying cause through detailed history taking, physical examination, and necessary tests such as electrocardiography (ECG), and then develop individualized treatment plans based on the specific etiology. In general, patients without significant symptoms may not require specific treatment. However, for those with noticeable symptoms or underlying heart disease, treatment options such as anti-arrhythmic medications may be necessary. Additionally, patients can help prevent premature beats by improving lifestyle habits, maintaining a healthy diet, and engaging in appropriate physical exercise.