ventricular aneurysm
A localized outpouching of the ventricular wall typically resulting from previous myocardial infarction.
Full Definition
A ventricular aneurysm is a localized outpouching or ballooning of the ventricular wall that most commonly occurs as a complication of transmural myocardial infarction. The aneurysm forms when necrotic myocardium is replaced by thin fibrous tissue that cannot withstand normal ventricular pressures. True ventricular aneurysms contain all layers of the ventricular wall and typically demonstrate dyskinetic motion (outward movement during systole). On imaging, they appear as well-defined outpouchings with a wide neck connecting to the ventricular cavity. Ventricular aneurysms can lead to complications including heart failure, arrhythmias, and thromboembolism. They are most commonly located in the anterior or apical regions following LAD territory infarctions.
Usage
Usage note: Distinguish from pseudoaneurysms; describe location and associated wall motion abnormalities.
In Context
- "Echocardiography revealed a large anterior ventricular aneurysm with dyskinetic wall motion." — Cardiac imaging report
- "The patient developed a ventricular aneurysm three months following anterior STEMI." — Clinical follow-up note