“The aorta is the motorway of the circulation. Hypertension is like running lorries at twice the speed limit for thirty years — eventually, the road gives way.”
By Dr. Rahul Agarwal | MS, DNB — Consultant Vascular & Endovascular Surgeon, CARE Hospitals, Banjara Hills, Hyderabad
The abdominal aortic aneurysm (AAA) is one of the most feared diagnoses in vascular surgery — not because it is untreatable, but because it so often goes undetected until it ruptures. When an AAA ruptures, mortality exceeds 80%. When detected early and electively repaired, survival is over 95%.
🪸 What Is an Aortic Aneurysm?
An aneurysm is a permanent, localised dilation of an artery to more than 1.5 times its normal diameter. In the abdominal aorta (normal diameter ~2cm), an AAA is defined at 3cm or more. The danger zone begins at 5–5.5cm.
📊 How Hypertension Causes Aneurysm
- Mechanical wall stress: Chronic elevated pressure increases wall stress in a destructive cycle
- Proteolytic destruction: Hypertension triggers enzymes that degrade elastin and collagen in the aortic wall
- Atherosclerosis: Further weakens the aortic wall
🚨 Screening Criteria
- Men aged 65+ with smoking history
- Men aged 55+ with first-degree family history of AAA
- Any patient with PAD or known atherosclerosis
- Hypertensive patients who also smoke
🔬 Management
- AAA <5cm: Surveillance every 6–12 months; strict BP control; smoking cessation
- AAA 5–5.5cm: Surgical repair usually recommended
- AAA >5.5cm: Repair strongly indicated
- Symptomatic AAA: Urgent repair
❓ Frequently Asked Questions
How is an aortic aneurysm repaired?
Two main approaches: endovascular repair (EVAR) via groin vessels under X-ray guidance (minimally invasive), or open surgery. Choice depends on anatomy, age, and fitness.
My father had an aortic aneurysm. What is my risk?
First-degree relatives have a 15–25% lifetime risk. Screening is strongly recommended for male first-degree relatives over 55.
🔑 Key Insights: Aortic aneurysm is largely silent until it ruptures — at which point mortality exceeds 80%. Hypertension is the primary modifiable driver. Screening with abdominal ultrasound is simple and safe. Early detection allows elective repair with over 95% survival.
📚 Related Reading
👨⚕️ About the Author
Dr. Rahul Agarwal is a Consultant Vascular & Endovascular Surgeon at CARE Hospitals, Banjara Hills, Hyderabad (MS, DNB). He performs both EVAR and open aortic aneurysm repair.
Medical Disclaimer: This article is intended for general patient education only and does not constitute individualised medical advice. Always consult a qualified medical professional for diagnosis and treatment specific to your condition.