Coronary Artery Disease Clinical Trial
Official title:
Phase 3 Study of Effect of ATorvastatin on Fractional Flow Reserve in Coronary Artery Disease
Natural course of intermediate coronary artery disease (CAD) is very important to predict the prognosis of the patient with such disease. Several studies have well demonstrated the beneficial effect of lipid-lowering therapy on the progression of CAD with the modification of lipid profiles. This effect can be also explained by intravascular ultrasound (IVUS) or optical coherence tomography. However, the effect of plaque modification on coronary physiology has been rarely evaluated. This research is to evaluate the change of intermediate or nonculprit coronary lesion on lipid-lowering therapy via IVUS(optional) and FFR.
The patients who have intermediate CAD (30-80% diameter stenosis by visual estimation) with FFR≥0.80, or nonculprit coronary artery disease with FFR≥0.8 after culprit coronary artery disease intervention will be enrolled. FFR, IVUS(optional) and index of microcirculatory resistance (IMR) should be performed simultaneously. Atorvastatin 20mg is a starting dose, then up-titration will be done twice within each 4~6weeks until LDL target goal (① LDL<70mg/dl, or ② statin naive: >50% reduction from baseline LDL, current statin user: >30% reduction from baseline LDL). First titration will be atorvastatin 40mg, second will be atorvastatin 80mg. If patients have any adverse effect on atorvastatin, the dose of atorvastatin can be adjusted by investigator's decision. Official clinical follow-up except visit for statin dose titration will occur at 1, 12 months after index procedure. Follow-up coronary angiography, FFR,IMR,and IVUS(optional) will be performed 12 months after index procedure. ;
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