Varied appearance of cardiac pseudoaneurysms on blood pool images.

Three cases of cardiac pseudoaneurysms were presented, with findings at the time of gated blood pool imaging. In only one of three was there the finding of a small neck connecting the ventricular cavity with the pseudoaneurysm. In the other two patients, there was a considerably larger communication. The size of the pseudoaneurysm itself was also of little diagnostic assistance. In one case it was small, while in a second patient it was larger in size. The third case revealed a pseudoaneurysm of enormous size (larger than the ventricular cavity). Gated blood pool imaging apparently can be called upon to demonstrate the presence of an abnormality. It may not be able to definitely establish the diagnosis of pseudoaneurysm, but should suggest the use of cardiac angiography to distinguish these life threatening lesions from true aneurysms.