A seemingly ordinary Sunday in January 2026 took a life-threatening turn for one New Zealander, highlighting the silent danger of abdominal aortic aneurysms (AAAs). The individual, a 68-year-old man, collapsed at home due to a ruptured AAA, a condition he was previously unaware of.
A Silent Threat
AAAs occur when a weakness develops in the wall of the aorta, the body’s largest artery, causing it to balloon. These aneurysms can rupture, leading to massive internal bleeding and a high risk of death. Many individuals are unaware they have an AAA until it ruptures, and a significant proportion do not survive, even with medical intervention.
Each year, AAAs claim the lives of up to 400 New Zealanders – a number comparable to, or even exceeding, the number of deaths from vehicle accidents. Despite this significant toll, awareness of AAAs remains low.
Disparities in Outcomes
While AAAs are a concern across the population, certain groups are disproportionately affected. Māori men over the age of 60 experience a significantly higher death rate from AAAs (8.9 per 100,000) compared to non-Māori men (3.7 per 100,000). The condition also poses a greater risk to smokers and individuals with high blood pressure. Women, while less likely to develop an AAA, face a higher mortality rate if they do.
AAAs account for 1.4% of deaths in men over 65 and 0.5% of deaths in women in New Zealand. They also represent a substantial financial burden on the healthcare system, with the highest cost per admission of any cardiovascular condition.
What Could Happen Next?
Researchers have investigated the potential benefits of a national screening program for AAAs, and the Health Research Council funded research into this in 2024. If screening were implemented, it could lead to earlier detection and intervention, potentially reducing mortality rates. Though, without a change in policy, the current situation is likely to persist, with hundreds of New Zealanders continuing to succumb to this often-silent killer each year.
Frequently Asked Questions
What is an abdominal aortic aneurysm?
An abdominal aortic aneurysm (AAA) is a swelling or dilatation in the abdominal part of the aorta, a major artery in the body.
How common are AAAs in New Zealand?
AAAs are fairly common, especially in older men. They cause over 1000 hospitalisations annually in New Zealand.
Are Māori at higher risk of death from AAAs?
Yes, the death rate from aneurysms is higher in Māori men (8.9 per 100,000) compared to non-Māori men (3.7 per 100,000).
Given the potentially devastating consequences of AAAs, and the disparities in outcomes, what more can be done to raise awareness and improve prevention efforts in New Zealand?
