AHA Scientific Sessions 2026 Abstract
AI fitness estimates from heart recordings linked to death risk
In 5,398 patients, estimates were off by an average of 4.87 milliliters of oxygen per kilogram per minute compared with exercise-test measurements.In 5,398 patients, estimates were off by an average of 4.87 milliliters of oxygen per kilogram per minute compared with exercise-test measurements.

Cohort · 5,398 peopleBiomarkers
Who was studied5,398 patients who underwent clinically indicated CPET, against the lowest quartile
What changedDeath from any cause was 54% lower in the highest estimated fitness quartile than in the lowest
The catchThe cohort was mostly White and excluded people with pacemaker-controlled heart rhythms