rupture of omental artery leading to hemoperitoneum and shock in a CAPD patient.
A pseudoaneurysm, albeit rare (3), is more likely to rupture than is a true aneurysm
and thus is a post-MI complication that warrants urgent surgery (4).
By then, the defined case should be free wall rupture following the myocardial infarction rather than a true aneurysm
Histology demonstrated a true aneurysm
where all three layers (intima, media, and adventitia) of the arterial wall were seen and showed focal degenerative changes.
There was focal intramural and perivascular hemorrhage with some thinning of the portal vein, but a true aneurysm
was not identified.
2) As with any imaging modality, on CT a true aneurysm
should have a relatively wide mouth or neck (Figure 13).
The most common type of aneurysm is a true aneurysm
, which forms after transmural infarction by gradual thinning and expanding of the scarred left ventricular wall (1).
Although not identified here, true aneurysm
formation at the site of repair is not uncommon in patients who have undergone prior synthetic patch aortoplasty, while it is infrequent in those repaired with end-to-end anastamosis or interposition grafting.
in that true aneurysms
are an abnormal dilatation or ballooning of the artery, containing all three normal layers of the vessel wall (endothelium, media, and adventitia).
PAU may be complicated by the development of true aneurysms
, pseudoaneurysms (Figure 15), dissection and aortic rupture (Figure 16)4.
characteristically have an anteroapical location with a wide ostium (more than 50% of the aneurysm diameter).
, in contrast, are vascular out pouchings involving all three tissue layers of the aorta.