Coronary Artery Disease Clinical Trial
Official title:
CONTRAST (Can cONTrast Injection Better Approximate FFR compAred to Pure reSTing Physiology?)
The purpose of this study is to determine the diagnostic performances of iodine contrast medium and resting conditions to predict fractional flow reserve (FFR). Reference FFR will be measured using standard adenosine. We hypothesize that contrast FFR will offer superior diagnostic agreement compared to resting conditions.
We are conducting a diagnostic accuracy study. The reference standard is adenosine-derived FFR. The diagnostic tests undergoing evaluation are resting conditions and hyperemia induced by intracoronary injection of contrast medium. While all these tests give a continuous result, we will apply binary cutoffs for comparison to FFR≤0.8 as the reference standard. Subjects will be selected prospectively from consecutive patients undergoing FFR assessment for standard clinical indications. The paired comparative design means that each patient will undergo resting (baseline), post-contrast, and adenosine-derived measurements. To enhance test integrity, all pressure recordings will be analyzed in a central physiology core laboratory blinded to clinical data and recruiting site. ;
Observational Model: Cohort, Time Perspective: Prospective
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