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症例は73歳,女性.主訴は胸背部痛.入浴中,ショック状態となり救急搬送され入院した.心臓超音波検査,胸部CTにて冠動脈瘤破裂による急性心タンポナーデを疑った.昇圧剤にて血圧維持し,家人が手術を拒否したため経過観察とした.第5病日,再び胸痛出現,ショック状態となり,第7病日死亡した.剖検では血性心嚢液約300mlを認めた.右冠動脈円錐枝から分枝する冠動脈瘻があり,肺動脈弁前尖部に開口していた.また,冠動脈瘻は肺動脈前方で径約30mmの瘤を形成し,瘤の前面には破裂孔を認めた.冠動脈肺動脈瘻に合併した嚢状動脈瘤の自然破裂により心タンポナーデを来した1例につき報告した.
A 73-year-old woman experienced back pain and developed shock due to a ruptured coronary aneurysm resulting from coronary artery fistula. Echocardiogram and computed tomography revealed cardiac tamponade. Althoug vasopressor agents relieved her hemodynamic state, reccurent chest pain occurred foll-owed by shock and she died. On autopsy, the pericar-dial cavity was found filled with about 300 ml of hemor-rhagic fluid. Coronary artery fistula with a saccular aneurysm was found originating from the conus branch of the right coronary artery draining to the pulmonary artery. Perforation was detected on the surface of the saccular aneurysm with a diameter of approximately 30 mm. This is a rare case of ruptured coronary aneurysm of coronary artery-pulmonary artery fistula.
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