TAAA
Also written as: TAAA — Thoracoabdominal Aortic Aneurysm
Acronym for Thoracoabdominal Aortic Aneurysm, aneurysmal dilatation involving both thoracic and abdominal aortic segments.
Full Definition
TAAA (Thoracoabdominal Aortic Aneurysm) refers to aneurysmal dilatation of the aorta that extends from the thoracic cavity into the abdomen, crossing the diaphragm. These complex aneurysms are classified using the Crawford classification system (Types I-V) based on the extent of involvement from the left subclavian artery to the aortic bifurcation. TAAA repair is among the most challenging procedures in vascular surgery due to the need to preserve blood flow to multiple organ systems including the spinal cord, kidneys, and intestines. Both open surgical and endovascular approaches are utilized depending on patient anatomy and comorbidities.
Usage
Usage note: Distinguish from TAA (thoracic aortic aneurysm) and AAA (abdominal aortic aneurysm).
In Context
- "The extensive TAAA required multistage endovascular repair with fenestrated and branched stent grafts." — Operative report
- "Crawford Type II TAAA carries the highest risk for spinal cord ischemia." — Medical literature