Coronary Artery Disease Clinical Trial
Official title:
Physiology as Guidance to Evaluate the Direct Impact of Coronary Lesion Treatment: the PREDICT Study
The purpose of this study is to assess whether the use of physiology parameters as guidance post-percutaneous coronary interventions (PCI) is associated with less risks of target vessel failure (TVF) and angina-related events than standard angiographic guidance.
Fractional flow reserve (FFR) measurement involves determining the ratio between the maximum achievable blood flow in a diseased coronary artery and the theoretical maximal flow in a normal coronary artery. An FFR of 1.0 is widely accepted as normal. An FFR value less than or equal to 0.80 is generally considered to be associated with myocardial ischemia. FFR is easily measured during routine coronary angiography by using a pressure wire to calculate the ratio between coronary pressure distal to a coronary artery stenosis and aortic pressure under conditions of maximum myocardial hyperemia. this ratio represents the potential decrease in coronary flow distal o the coronary stenosis. Recently, other physiology ratios called non-hyperemic ratios (NHPR) have been developed. Both types of physiology measures (FFR and NHPR) have been increasingly used in cardiac catheterization laboratories as a diagnostic tool. They provide a quantitative assessment of the functional severity of a coronary artery stenosis identified during coronary angiography and cardiac catheterization. However, they are underutilized as tools for the assessment of success of coronary interventions. The PREDICT study is a pilot study which aims to prospectively determine whether post-PCI physiology guidance is associated with better clinical outcomes than standard angiographic guidance. ;
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