患者，男，21岁。活动后胸闷、气短两年，加重半年入院。查体：体温36.5℃，脉搏82次，血压13／9kPa，呼吸18次，发育正常。心界不大，心率82次，律不齐，偶可闻及过早搏动，心尖部可闻及Ⅱ级收缩期返流样杂音，肺第二音分裂。肝肋下未触及，双下肢无浮肿，无杵状指（趾）。心 Patient, male, 21 years old. After the event, chest tightness and shortness of breath were two years. Heavily admitted to hospital after half a year. Physical examination: body temperature 36.5°C, pulse 82, blood pressure 13/9kPa, breathing 18 times, normal development. The heart is not big, heart rate is 82, irregular, even can be heard and premature beat, apex can hear the systolic regurgitation-like murmur, split lung second tone. The liver did not touch under the ribs, no edema of the lower limbs, no callus (toe). heart