CTICasesHemodynamically Significant OM Stenosis on CTFFR
Imaging findings
Coronary CT angiography shows an anatomically moderate stenosis in the obtuse marginal (OM) artery. CTFFR demonstrates a hemodynamically significant gradient (FFR < 0.75), which correlated with a perfusion defect in the OM territory on stress testing.
Key takeaways
Anatomically moderate stenoses (50-60%) can be hemodynamically significant and cause ischemia. Non-invasive CTFFR can successfully identify these lesions, matching the results of stress testing and catheter-based FFR.
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