患者，女性，26岁。于入院前两个月体检发现“心脏增大”。外院先后诊断为“心脏病”、“纵隔肿瘤”。患者四年前即有胸闷、鳖气盛、近两年来加重，尤以活动后明显，伴有胸痛，尚能参加日常家务劳动。查体：T36．soC，P84次／分，R18次／分，BP14／gkpa，无紫组及呼吸困难、颈? Patient, female, 26 years old. Two months before admission, the physical examination revealed “heart enlargement.” The hospital has been diagnosed with “heart disease” and “mediastinal tumor.” The patient had chest tightness four years ago and was full of hernia. In the past two years, he was aggravated, especially after the activity, accompanied by chest pain, and still able to participate in daily housework. Physical examination: T36. soC, P84 beats/min, R18 beats/min, BP14/gkpa, no purple group and dyspnea, neck?