Spontaneous wave-free ratio versus fractional flow reserve to guide PCI - The New England Journal of Medicine - 2017

Brief Summary:

In patients with stable or unstable coronary artery disease (CAD) undergoing revascularization with intermediate coronary lesions, iFR is noninferior to FFR for PCI guidance, with similar rates of all-cause mortality, nonfatal MI, or unplanned revascularization in both groups at 12 months.

Reference: http://www.ncbi.nlm.nih.gov/pubmed/28317438