A Cleveland Clinic analysis of 531 adults with anomalous aortic origin of coronary arteries (AAOCA) found that invasive dobutamine iFR testing detected ischemia 27 times more frequently than standard ECG stress tests, with PET imaging showing 9-fold higher detection rates. The study examined 699 stress tests across multiple modalities, revealing that left main coronary anomalies carried twice the ischemia risk compared to other variants, while intramural coronary courses showed 1.9-fold higher odds of positive results. These coronary birth defects affect roughly 1% of the population and can trigger sudden cardiac death in young athletes and adults. The superior sensitivity of invasive iFR testing—which measures pressure ratios within coronary arteries during pharmaceutical stress—challenges current diagnostic approaches that rely heavily on non-invasive methods. However, this preprint awaits peer review, and the retrospective design limits causal conclusions. The findings suggest many AAOCA patients may harbor undetected ischemia using conventional testing, potentially missing opportunities for life-saving interventions. This represents an important incremental advance in cardiovascular risk stratification, though validation through prospective studies with clinical outcomes will be essential before reshaping diagnostic protocols.