Many patients with severe aortic regurgitation live with a leaking heart valve, hoping their doctors will wait until the heart gets big enough to justify surgery. This study followed 140 of these patients for a median of nearly eight years to see what happened while they waited. The team tracked how their left ventricle changed over time using serial echocardiograms, which are repeated ultrasound scans of the heart.
They found that the heart did not stay perfectly still. The size of the heart muscle increased slightly, while its ability to squeeze decreased. More importantly, every small change mattered. For every millimeter the heart got wider, the risk of needing surgery, getting hospitalized, or dying went up by 5% to 6%.
The study also showed that older patients faced much higher risks, with risk climbing 65% for every decade of age. Only eight patients were predicted to reach the standard size limit for surgery within ten years. This means relying on a simple linear progression to a guideline cutoff might miss warning signs in many people.
The researchers conclude that decisions about valve replacement should be based on a comprehensive clinical and volumetric assessment rather than waiting for simple linear progression to guideline cutoffs. This approach ensures patients do not wait too long for help when their heart is already showing signs of trouble.
