Aortic stenosis is a progressive and potentially fatal condition, affecting an estimated 300,000 people in the UK. It affects about 5% of 65-year-olds in the US, with increasing prevalence in advancing age.

A new study, published in Open Heart , reveals how a four-dimensional flow (4D flow) MRI scan can diagnose aortic stenosis more reliably than current ultrasound techniques.

The superior accuracy of the new test means doctors can better predict when patients will require surgery.

It is hoped the breakthrough could help save thousands of lives in the UK alone.