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Discrepancy between fractional flow reserve and instantaneous wave-free ratio: Clinical and angiographic characteristics

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Affiliated Author(s)
남창욱
Alternative Author(s)
Nam, Chang Wook
Journal Title
International Journal of Cardiology
ISSN
0167-5273
Issued Date
2017
Keyword
Coronary artery diseaseDiscordanceFractional flow reserveInstantaneous wave free ratioIschemiaPrognosis
Abstract
BACKGROUND:

The invasive physiologic index such as fractional flow reserve (FFR) or instantaneous wave-free ratio (iFR) is used in clinical practice to identify ischemia-causing stenosis and to guide treatment strategy. We investigated clinical and angiographic characteristics of lesions with discrepancy between FFR and iFR.

METHODS:

From the 3V FFR-FRIENDS study, 975 vessels (393 patients) with available pre-intervention FFR and iFR were included in this study. The vessels were classified according to FFR and iFR into: concordant normal (Group 1 [n=724]: FFR>0.80 and iFR≥0.90); high FFR and low iFR (Group 2 [n=33]: FFR>0.80 and iFR<0.90); low FFR and high iFR (Group 3 [n=82]: FFR≤0.80 and iFR≥0.90); and concordant abnormal (Group 4 [n=136]: FFR≤0.80 and iFR<0.90).

RESULTS:

Angiographic stenosis severity assessed by percent diameter stenosis, minimum lumen diameter and lesion length was increased from Group 1 to Group 4 (all p<0.001). SYNTAX score increased and FFR decreased proportionally from Group 1 to Group 4 (all p<0.001). In multivariable GEE model, female, diabetes mellitus, smaller reference vessel diameter, and higher %DS were significantly associated with low iFR among high FFR groups (Group 2 discordance). Conversely, males, absence of diabetes mellitus and lower %DS were significantly associated with high iFR among low FFR groups (Group 3 discordance).

CONCLUSIONS:

Four groups classified according to FFR and iFR were different in clinical and angiographic characteristics, SYNTAX score, and predictors of discordance. The lesions with discordant FFR and iFR may need to be interpreted as a different clinical entity.
Department
Dept. of Internal Medicine (내과학)
Publisher
School of Medicine (의과대학)
Citation
JooMyung Lee et al. (2017). Discrepancy between fractional flow reserve and instantaneous wave-free ratio: Clinical and angiographic characteristics. International Journal of Cardiology, 245, 63–68. doi: 10.1016/j.ijcard.2017.07.099
Type
Article
ISSN
0167-5273
DOI
10.1016/j.ijcard.2017.07.099
URI
https://kumel.medlib.dsmc.or.kr/handle/2015.oak/41194
Appears in Collections:
1. School of Medicine (의과대학) > Dept. of Internal Medicine (내과학)
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