Coronary CT Angiography and Stress Echocardiography With Long-Term Cardiac Outcome: A Comparison Study

When evaluating suspected stable coronary disease, clinicians can choose anatomical imaging (CT angiography) or functional testing (stress echocardiography). This study asked which measurements from each best predict long-term outcomes.

In nearly 400 patients, several markers initially looked predictive — wall-motion abnormalities, coronary flow velocity reserve, calcium score, number of diseased vessels — but after statistical adjustment, only two survived as independent predictors: the coronary calcium score from CT and the coronary flow velocity reserve from stress echo. Notably, these represent one anatomical and one functional measure, suggesting the two modalities capture complementary information.

The finding is useful for selecting and interpreting tests, highlighting that calcium burden and coronary flow reserve carry the prognostic weight, while some traditionally emphasized findings did not hold up independently.

We rate the evidence strong for its design within limits. It is a sound retrospective comparison, though its modest size and single-center, non-randomized nature mean its specific predictor rankings need larger confirmation.