Congenital Giant Aneurysm of the Left Atrial Appendage Mimicking Pericardial Absence

  • Kunishima Tomoyuki
    Department of Cardiology, Yokohama Seibu Hospital, St Marianna University
  • Musha Haruki
    Department of Cardiology, Yokohama Seibu Hospital, St Marianna University
  • Yamamoto Terushige
    Department of Cardiology, Yokohama Seibu Hospital, St Marianna University
  • Aoyagi Hideshi
    Department of Cardiology, Yokohama Seibu Hospital, St Marianna University
  • Kongoji Ken
    Department of Cardiology, Yokohama Seibu Hospital, St Marianna University
  • Imai Michiko
    Department of Cardiology, Yokohama Seibu Hospital, St Marianna University
  • Ozawa Atsushi
    Department of Cardiology, Yokohama Seibu Hospital, St Marianna University
  • So Takehiko
    Department of Cardiology, Yokohama Seibu Hospital, St Marianna University
  • Nagashima Junzo
    Department of Internal Medicine (Cardiology), St Marianna University
  • Murayama Masahiro
    Department of Internal Medicine (Cardiology), St Marianna University

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タイトル別名
  • Case Report

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説明

A 25-year-old man was found to have an abnormal cardiac contour on a chest radiograph, and was referred. Transesophageal echocardiography suggested herniation of the left atrial appendage (LAA) through a gap in the pericardium, and magnetic resonance imaging indicated congenital partial absence of the pericardium. Cardiac dysfunction was caused by compression from the enlarged left atrium and thrombi were thought to be present in the appendage, so surgery was performed. The intraoperative diagnosis was congenital LAA aneurysm. Although distinguishing between congenital LAA aneurysm and congenital absence of the pericardium is reported to be possible with magnetic resonance imaging, we were unable to so in this case. (Jpn Circ J 2001; 65: 56 - 59)

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