Case PresentationA male patient,64years old,received esophagealcarcinoma radical surgery in Nov1989.In March1991,the symptomof coughtook place because of cold.He wasadmittedintothe hospital for palpitation and short breathafter taking erythromycin.He denied the history ofhypertension,diabetes mellitus and coronary heartdisease.Physical examination on admission:BP110/78mmHg,P40bpm,R16bpm.ECGresults:Ⅲ°AVB;ventricular escape rhythm;complete right bundle branchblock;STsegment depression≥…