Diagnosis was made depending on clinical symptoms, physical examination, EKG and provocative test with atropine sulfate. The etiologies of 4 cases were as follows: coronary disease, hypertension, myocarditis, coronary disease with hypertension; but, the etiology of one case was not clear. Symptoms, including syncope, dizziness, and palpitation subsided after implanting the temporary pacemaker.

A permanent pacemaker was implanted in all but one case, who had myocarditis.