There was first-degree AV block in 5 patients (2.7%) documented by electrocardiogram and in 9 patients(7.6%) revealed during Holter monitoring.是什么意思_There was first-degree AV block in 5 patients (2.7%) documented by electrocardiogram and in 9 patients(7.6%) revealed during Holter monitoring.在线翻译_英语_读音_用法_例句