Obstructive Thrombus in Right Atrium

Cardiac masses always represented a diagnostic challenge for clinicians. The distinction between the different types of intracardiac masses, including thrombi, vegetation and tumors, is an important step in providing therapeutic and prognostic information to the patient. Transthoracic 2D echocardiogram is the primary diagnostic tool used widely to detect and evaluate intracardiac mass and the cardiac MRI has become a useful tool to further characterize the mass. We are presenting a case in which the cardiac MRI was useful in the evaluation of an isolated mass obstructing tricuspid inflow in the right atrium.