Physiology guided PCI consists of evaluating the functional severity of a stenosis in the coronary artery to determine the need for revascularization. Currently it is performed using fractional flow reserve (FFR) or instantaneous wave-free ratio (iFR). FFR is assessed during maximal reactive hyperemia...
2. Topographical versus Structural Heart A heart with two ventricles, separated by a midline muscular septum defines its classic morphologic description. Despite correct topography, no functional insight is provided to define what these three structures do. A different structural guideline has existed ...