Type:
Educational Exhibit
Keywords:
Cardiac, Cardiovascular system, CT, MR, CT-Angiography, Education, Aneurysms, Congenital, Ischaemia / Infarction
Authors:
B. B. Das, P. Reddy, B. Nagabhushana Reddy, S. T. Prabhakar, S. Viswamitra; Bangalore/IN
DOI:
10.26044/ecr2019/C-1075
Background
Cardiac aneurysms can be caused potentially by wide varieties of aetiologies.
Ventricular aneurysms are broadly divided into true and pseudoaneurysms.
True aneurysm wall is composed of myocardium and fibrous tissue.
While pseudo aneurysm wall is composed of organized hematoma and pericardium with no normal myocardium.
It is seen that pseudoaneurysms have more intense enhancement on delayed imaging (1).
Cardiac CT and MR aid in non-invasive differentiation between a true and pseudoaneurysm,
which is important due to their differential complications and treatment strategies.
True aneurysms have a wider mouth,
while pseudoaneurysms have a narrow mouth.
They can also determine myocardial thinning (both CT and MR),
abnormal wall motion (bSSFP cine in CMR),
myocardial scarring (LGE in CMR) and thrombus formation.
MRI can also detect segments with intermediate viability by perfusion imaging and certain extent by LGE imaging which can benefit with revascularization.
This educational exhibit is primarily focussed to describe certain extra MRI and CT techniques during acquisition and certain key imaging points which will elucidate etiology of cardiac aneurysms.
This exhibit is point focussed with aneurysms which occur from base to apex of the heart.
Refer table (1) for Cardiac CT and MR protocolling for patients with cardiac aneurysms