Primary tumors of the heart are rare and most of them benign. The majority
of benign cardiac tumors are myxomas while almost all malignant cardiac tum
ors are sarcomas. We present a case of primary right atrial synovial sarcom
a, a form of sarcoma particularly rare in the heart. The tumor manifested c
linically as transient ischemic attacks probably related to a patent forame
n ovale allowing paradoxical tumor embolization. (C) 2000 by The Society of
Thoracic Surgeons.