The most common direct cause of premature beats is the presence of underlying heart disease, such as heart valve disease, coronary artery disease, or hypertensive heart disease. However, premature atrial contractions can also occur in people without underlying heart disease. Premature beats are common in patients with underlying heart disease as well as in the healthy population. Premature beats can be classified as sinus, atrial, atrioventricular junction, or ventricular, depending on the origin of the premature beats. Ventricular premature contractions are the most common, followed by atrial premature contractions. The most common direct cause of atrial premature beats is the presence of structural and functional abnormalities of the heart, such as patients with underlying heart disease such as heart valve disease, coronary artery disease, or hypertensive heart disease resulting in structural or functional abnormalities of the heart. In addition, patients with hyperthyroidism are at higher risk for premature beats than the normal population and are a risk factor for premature beats. Premature atrial contractions can also occur in people without underlying heart disease and are more likely to occur during stress and anxiety, as well as during exertion or in the presence of triggers such as alcohol or strong tea and coffee. Premature ventricular contractions also occur in patients with underlying heart disease, such as acute ischemic heart disease (coronary artery disease) and valvular disease leading to ventricular dilatation or hypertrophy. In addition, drug intoxication may be a direct cause of premature ventricular contractions, such as in patients taking digitalis, tricyclic antidepressants, and certain antibiotics (erythromycin, etc.). Electrolyte disorders such as hypokalemia and hypomagnesemia are also a cause of premature ventricular contractions. Premature ventricular contractions can also occur in healthy people and are triggered by the same factors as atrial premature contractions. Premature beats can occur in patients with underlying heart disease as well as in healthy people. You should try to develop good habits in life, avoiding anxiety, fatigue, alcohol, coffee, tea and other triggers of premature contractions. In case of suspected premature beats, it is important to consult a doctor promptly for further examination and treatment options.