scholarly journals Application of Pressure-Derived Myocardial Fractional Flow Reserve in Assessing the Functional Severity of Coronary Artery Stenosis in Patients With Diabetes Mellitus

2004 ◽  
Vol 68 (11) ◽  
pp. 993-998 ◽  
Author(s):  
Hidefumi Yanagisawa ◽  
Taishiro Chikamori ◽  
Nobuhiro Tanaka ◽  
Yasuhiro Usui ◽  
Kenji Takazawa ◽  
...  
Keyword(s):  
Diabetes Mellitus ◽  
Coronary Artery ◽  
Fractional Flow Reserve ◽  
Coronary Artery Stenosis ◽  
Artery Stenosis ◽  
Fractional Flow ◽  
Flow Reserve ◽  
Patients With Diabetes ◽  
Myocardial Fractional Flow Reserve

Fractional flow reserve and instantaneous wave-free ratio discordance in patients with severe aortic valve stenosis

2020 ◽  
Vol 41 (Supplement_2) ◽  
Author(s):  
F Yamanaka ◽  
K Shishido ◽  
S Yokota ◽  
N Moriyama ◽  
Y Mashimo ◽  
...  
Keyword(s):  
Coronary Artery ◽  
Aortic Valve ◽  
Aortic Valve Stenosis ◽  
Fractional Flow Reserve ◽  
Coronary Artery Stenosis ◽  
Artery Stenosis ◽  
Aortic Valve Area ◽  
Fractional Flow ◽  
Left Anterior Descending Artery ◽  
Flow Reserve

Abstract Background It has been reported that discordance between fractional flow reserve (FFR) and Instantaneous Wave-Free Ratio (iFR) could occur in up to 20% of cases. However, there are no reports regarding discordance between FFR and iFR in patients with severe aortic valve stenosis (AS). Purpose We aimed to investigate the discordance between FFR and iFR in patients with severe AS. Methods Severe AS was defined as an aortic-valve area of ≤1.0 cm2, a mean aortic-valve gradient of 40mmHg or more, or a peak aortic-jet velocity of 4.0 m/s or more. Intermediate coronary artery stenosis was defined as 30% to 70% stenosis (visual estimation). FFR and iFR were calculated in 4 quadrants based on values of FFR ≤0.8 and iFR ≤0.89 (positive discordance; low FFR and high iFR, negative discordance; high FFR and low iFR). Results We examined consecutive 140 patients (164 intermediate coronary artery stenosis vessels). Mean FFR and iFR ± standard deviation was 0.82±0.09 and 0.82±0.14, respectively. The discordance was observed in 48 vessels (29.3%). In the discordant group, most of cases were negative discordance (45 cases, 93.6%). Binary logistic regression analysis showed that left anterior descending artery (Hazard Ratio 3.80; 1.55 to 9.31, p=0.0036) was independently associated with negative discordance. Conclusions In patients with severe AS, the discordance between FFR and iFR could be observed in 29.3% of the vessels, mostly negative discordance. The left anterior descending artery is an independent predictor for negative discordance. Funding Acknowledgement Type of funding source: None

Correlation between fractional flow reserve and intravascular ultrasound lumen area in intermediate coronary artery stenosis

2011 ◽  
Vol 7 (2) ◽  
pp. 225-233 ◽  
Author(s):  
Itsik Ben-Dor ◽  
Rebecca Torguson ◽  
Michael A. Gaglia ◽  
Manuel A. Gonzalez ◽  
Gabriel Maluenda ◽  
...  
Keyword(s):  
Coronary Artery ◽  
Intravascular Ultrasound ◽  
Fractional Flow Reserve ◽  
Coronary Artery Stenosis ◽  
Artery Stenosis ◽  
Lumen Area ◽  
Fractional Flow ◽  
Flow Reserve
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