Generally speaking, ventricular premature beats are more dangerous than atrial premature beats, but it depends on the specific condition and the complications it causes. Ventricular premature beats are ventricular pre-systoles, which are premature beats below the bifurcation of the Hitchcock’s bundle that prematurely depolarize the myocardium. Occasional premature ventricular beats may have no obvious symptoms or may present with mild palpitations and chest tightness. Frequent ventricular premature beats may be a prelude to ventricular tachycardia, a malignant arrhythmia that may present with significant hemodynamic disturbances and even sudden death. Atrial premature beats are atrial pre-systoles, which are atrial excitations originating outside the sinus node, and may be asymptomatic in some patients, while a few may present with palpitations and chest tightness. Atrial premature beats in general do not require treatment, and when they progress to atrial tachycardia, patients generally do not experience significant hemodynamic disturbances. In summary, the further progression of ventricular premature beats may cause more serious harm, but the specific needs of the patient’s condition, it is recommended to seek medical treatment in a timely manner, standardized treatment.