Figure - PMC

Skip to main content

An official website of the United States government

Here's how you know

Here's how you know

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you've safely connected to the .gov website. Share sensitive information only on official, secure websites.

View full-text article in PMC

. 2022 Jun 29;108(21):1737–1746. doi: 10.1136/heartjnl-2020-318743

Search in PMC
Search in PubMed
View in NLM Catalog
Add to search

© Author(s) (or their employer(s)) 2022. Re-use permitted under CC BY. Published by BMJ.

This is an open access article distributed in accordance with the Creative Commons Attribution 4.0 Unported (CC BY 4.0) license, which permits others to copy, redistribute, remix, transform and build upon this work for any purpose, provided the original work is properly cited, a link to the licence is given, and indication of whether changes were made. See: https://creativecommons.org/licenses/by/4.0/.

PMC Copyright notice

An approach to intracoronary physiological assessment for patients with chest pain but no obstructive coronary disease. *Indicates range for Doppler-based CFR (used in some protocols) and IMR. The European Society of Cardiology (ESC) guidelines give a IIa (B) recommendation for measuring CFR and microvascular resistance in patients with chest pain but unobstructed arteries.⁴ ACh, acetylcholine; CFR, coronary flow reserve; CMVD, coronary microvascular dysfunction; CP, chest pain; DS, diameter stenosis; FFR, fractional flow reserve; HMR, hyperaemic microvascular resistance; IMR, index of microvascular resistance; NHPR, non-hyperaemic pressure ratio.