Prognostic Impact of Lesion-specific Hemodynamic Index in Patients With Coronary Artery Disease

This study is examining whether a detailed measurement of blood flow in specific blocked heart arteries — obtained during a cardiac catheterization procedure — can help predict long-term outcomes for patients with coronary artery disease. Researchers are looking at whether this index can improve decision-making about treatment. **You may be eligible if...** - You are 20 years or older - You have undergone a successful FFR (fractional flow reserve) measurement — a test done during cardiac catheterization to assess blood flow in coronary arteries **You may NOT be eligible if...** - You have severe chronic kidney disease (eGFR less than 30) - You had a heart attack within the last 72 hours - You have had prior bypass surgery - You have primary heart muscle disease or valve disease - Your heart pumping function is severely reduced (ejection fraction below 30%) - You are hemodynamically unstable - Your life expectancy is less than 2 years Talk to your doctor to see if this trial is right for you.