Pre-procedurally, 5 milligrams of metoprolol were administered.
The investigation itself provides the following features:
Within the pericardium, a hypervascular structure is seen with a maximum diameter of 4.9 centimeters. Centrally, some hypodense calcifications are noted. Furthermore, the lesion is located between the pulmonary trunk, ascending aorta and the left pulmonary vein. It appears to drain via multiple venous structures that eventually meet in the coronary sinus. Obvious arterial blood supply cannot be observed. Also, no direct connection with the coronaries seems present. Some small branches of the right coronary artery might feed the lesion. However, no evincive connection is apparent.
In contrast to the aorta and the coronaries, the lesion appears less dense. It does not seem to grow invasively. Moreover, the coronaries do not exhibit stenosis or vascular wall irregularities.
NB The coronaries do not appear hyperplastic, as frequently seen in arteriovenous malformations or fistulas.