Two premature atrial beats and one premature ventricular beat may not be serious or may be serious. It may be more severe if it is caused by an organic lesion, or it may not be severe if it is caused by a transient, non-organic lesion. Two premature atrial beats and one premature ventricular beat are not necessarily due to organic lesions of the heart. Emotional stress, overwork and other conditions can also cause sudden heartbeat disorders, with transient premature atrial and ventricular beats, which can be relieved on their own by resting, if the patient does not have any obvious symptoms such as palpitations, chest tightness and other abnormal symptoms. So it may not be serious. If the heart has a pathologic lesion such as coronary heart disease, hypertension, etc., resulting in organic changes in the heart, thus affecting the normal function of the heart, there are two atrial premature beats and one ventricular premature beat. Therefore, it may also be a serious phenomenon. If the patient has the above symptoms, rest enough on their own without relief should go to the hospital in time, under the advice of the doctor for relevant examinations.