Primary cardiac tumors are rare in infancy and childhood. We describe
the features of large intramural ventricular cardiac fibromas discover
ed in two children. In the first, a left ventricular apical tumor was
discovered by means of echocardiography and left ventriculography in a
symptomless 8-year-old boy. The intramural fibroma was successfully r
esected. In the other case, an 8-month-old female infant with severe c
ongestive heart failure, sudden ventricular tachycardia and fibrillati
on occurred during left ventriculography. At necropsy a tumor was seen
bulging in the anterior wall of the left ventricle and in the ventric
ular septum. Histology showed the tumor to be a fibroma.