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Angiology
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Transesophageal Echocardiography for Detecting Intracardiac Thrombi in Embolic Stroke

Kazunori Toyoda, M.D.

Cerebrovascular, Nationla Cardiovascular Center, Suita City, Osaka, Japan

Masahiro Yasaka, M.D.

Cerebrovascular, Nationla Cardiovascular Center, Suita City, Osaka, Japan

Seiki Nagata, M.D.

Cardiac Divisions, Department of Medicine, National Cardiovascular Center, Suita City, cOsaka, Japan

Nobushige Yamashita, M.D.

Cardiac Divisions, Department of Medicine, National Cardiovascular Center, Suita City, cOsaka, Japan

Satoshi Imakita, M.D.

Department of Radiology, National Cardiovascular Center, Suita City, Osaka, Japan

Takenori Yamaguchi, M.D.

Cerebrovascular, Nationla Cardiovascular Center, Suita City, Osaka, Japan

The authors studied 56 patients with cardioembolic stroke to search for intracardiac thrombi by use of transesophageal and transthoracic echocardiography. Forty consecutive patients were examined within four weeks of stroke onset and the remaining 16 in the chronic stage. They also performed ultrafast computed tomography in 9 of them. Underlying heart disease was present in all subjects. Anticoagulant therapy had already been started in 29 at the time of examinations. Using their own criteria for echocardiography, they diagnosed intracardiac thrombus in 7 cases and valvular vegetation in 1. Six thrombi were located in the left atrial appendage, 4 of which were smaller than 10 mm in diameter. These small thrombi were not found by either transthoracic echocardiography or computed tomography. Transesophageal echocardiography appears to be superior to the other two methods, especially for detecting small intracardiac thrombi in the left atrial appendage.

Angiology, Vol. 44, No. 5, 376-383 (1993)
DOI: 10.1177/000331979304400506
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