what can cause compression of the right atrium?

Question

No recent surgeries. Had a recent MRI that showed compression. Is having a CT-Scan soon. Just trying to find the possible reasons this could occur.

Answer 1

raiderchicklett,

What can cause it? Well, a really big blood clot can do so.

Compression of the right atrium can occur after a bypass surgery, when a blood clot forms in the tissue of the heart.

Did your relative (I assume that it happened this way) have surgery lately?

Of course, it doesn't have to be surgery. Heart disease will often cause a blood clot to form in a vessel, and if there is a small perforation in the vessel's lining the blood clot can form on the outside of the vessel but inside the sac around the heart ("pericardium," a fancy Greek word for "around the heart"), so as it grows, it presses on part of the heart. In this case, the right atrium.

Answer 2

Heart chambers rupture in blunt trauma is uncommon and is associated with a high mortality. The determinant factors, and the incidence of isolated heart chambers rupture remains undetermined. Isolated rupture of the right atrium appendage (RAA) is very rare, with 8 cases reported in the reviewed literature. The thin wall of the RAA has been presumed to render this chamber more prone to rupture in blunt trauma.
Postoperative Right Atrial Compression by Extracardiac Hematoma: ... Isolated right atrial compression, due to localized hematoma has been reported to occur.
The chest radiograph showed cardiomegaly and right-sided pleural effusion. Echocardiographic examination detected compression of the right atrium (RA).
gus, and rarely right atrium by an aortic aneurysm has been. described before but presentation with left atrial compression.