Coronary pressure measurement has emerged as one of the most promising tool to assist interventional cardiologist to make accurate clinical decisions. Fractional flow reserve(FFR) is a simple, fast, and safe method to achieve functional information about the coronary artery stenosis in the catheterization laboratory. The implementation of FFR program in the catheterization laboratory is simple, and the staff can be trained within a few cases. This review outlines the practical set up of FFR in the catheterization laboratory and also discusses the potential pitfalls in the measurement of FFR.