EVAR
Pronunciation: EE-var
Also written as: EVAR — Endovascular Aneurysm Repair
Minimally invasive technique using stent-grafts to exclude aortic aneurysms from circulation.
Full Definition
Endovascular aneurysm repair (EVAR) is a minimally invasive technique for treating aortic aneurysms using covered stent-grafts inserted through peripheral arteries to exclude the aneurysm sac from systemic circulation. The procedure involves percutaneous or surgical access through the femoral arteries, followed by deployment of modular or unitized stent-graft components that create a new conduit for blood flow while sealing the aneurysm. EVAR requires specific anatomical criteria including adequate proximal and distal neck lengths, appropriate angulation, and suitable access vessels. Post-procedural surveillance includes imaging to detect endoleaks, device migration, or aneurysm sac expansion. EVAR has become the preferred treatment for suitable infrarenal abdominal aortic aneurysms due to reduced perioperative morbidity and mortality compared to open surgical repair, though long-term durability and reintervention rates remain areas of ongoing study.
Usage
Usage note: Always capitalize as acronym; spell out on first use
In Context
- "The patient underwent successful EVAR for a 6.2 cm infrarenal abdominal aortic aneurysm." — Vascular surgery operative report
- "Annual CT surveillance following EVAR showed stable aneurysm sac size without endoleak." — Post-operative follow-up note