An Insight of Coronary slow-flow phenomenon (CSFP)

Abstract

Background: Coronary slow-flow phenomenon (CSFP) is characterized by delayed distal
vessel opacification of contrast, in the absence of significant epicardial coronary stenosis.
CSFP has been reported as a cause of chest pain and abnormal noninvasive ischemic tests
and is often underrecognized. CSFP also known as cardiac syndrome Y, is characterized
angiographically by delayed distal vessel opacification in the absence of obstructive
coronary artery disease and represents a pathology related to underlying dysfunction of
microvascular resistance. The diagnosis of CSFP is made via coronary angiography based
on either a reduced Thrombolysis in Myocardial Infarction (TIMI) flow grade of 2 or
increased corrected TIMI frame count of greater than 27 frames in one or more epicardial
vessel.