Results 221 to 230 of about 8,118,179 (242)

Factors Associated With Discordance Between Fractional Flow Reserve and Resting Full-Cycle Ratio

Journal of Cardiology, 2022
Resting full-cycle ratio (RFR), a non-hyperemic pressure ratio, is alternative to fractional flow reserve (FFR) for the evaluation of coronary artery stenoses. Although FFR and RFR results are often discordant using the cut-off values (0.80 and 0.89), factors associated with the discordance are unclear.
Hideki Kitahara, Yuichi Saito, Tatsuro Yamazaki   +2 more
exaly   +3 more sources

Independent Predictors of Discordance Between the Resting Full-Cycle Ratio and Fractional Flow Reserve

Heart and Vessels, 2021
The resting full-cycle ratio (RFR), a novel resting index, is well correlated with and shows good diagnostic accuracy to the fractional flow reserve (FFR). However, discordance results between the RFR and FFR have been observed to occur in about 20% of cases.
Hirohiko Ando, Katsuhisa Waseda, Tetsuya Amano   +2 more
exaly   +3 more sources

Validation of a Novel Non-Hyperaemic Index of Coronary Artery Stenosis Severity: The Resting Full-Cycle Ratio (VALIDATE RFR) Study.

EuroIntervention, 2018
AIMS: Randomised controlled trials have reported instantaneous wave-free ratio (iFR) to be non-inferior to fractional flow reserve (FFR) for major adverse cardiovascular events at one year; however, iFR is limited by sensitive landmarking of the pressure
Nils P Johnson, Aaron Crowley, Akiko Maehara   +2 more
exaly   +2 more sources

Relationship Between Resting Full-Cycle Ratio and Fractional Flow Reserve in Assessments of Coronary Stenosis Severity

Catheterization and Cardiovascular Interventions, 2020
AbstractAimComparisons between the resting full‐cycle ratio (RFR), a new physiological resting index, and fractional flow reserve (FFR) in terms of prognostic value are limited. We aimed to identify the prognostic value of concordance between RFR and FFR and to determine the stability of measured RFR.Methods and ResultsWe measured FFR and RFR in 161 ...
Ryo Eto, Hiroaki Kawano, Koji Maemura
exaly   +3 more sources

Resting Full-Cycle Ratio (RFR) in the Assessment of Left Main Coronary Disease: Caution Required

Heart Lung and Circulation, 2020
Hyperaemia-free indices have been gaining traction in recent times due to the practical advantages they offer over the fractional flow reserve (FFR) in the evaluation of angiographically intermediate coronary lesions. More recently, a new hyperaemia-free index, the resting full-cycle ratio (RFR), was described and found to correlate closely with the ...
Sze-Yuan Ooi, Kevin Liou
exaly   +3 more sources

In vivo validation of resting full-cycle ratio and diastolic pressure ratio: simultaneous measurement with instantaneous wave-free ratio

Cardiovascular Intervention and Therapeutics, 2020
The diastolic pressure ratio (dPR) and resting full-cycle ratio (RFR) are considered to be almost identical to the instantaneous wave-free ratio (iFR) in the retrospective analysis of pooled data. The aim of this study was to investigate the direct comparison of iFR and these new resting indexes in real world practice.
Yoshiaki Kawase, Hiroyuki Omori, Toru Tanigaki, Akihiro Hirakawa, Tetsuo Hirata, Hideaki Ota, Jun Kikuchi, Yoshihiro Sobue, Munenori Okubo, Hiroki Kamiya, Masanori Kawasaki, Takahiko Suzuki, Hitoshi Matsuo   +12 more
openaire   +2 more sources

Combined Assessment of Fractional Flow Reserve, Resting Full-Cycle Ratio, and Resting Ratio of Distal Coronary to Aortic Pressure for Clinical Outcomes

Journal of Cardiology
Fractional flow reserve (FFR) and non-hyperemic indices are invasive standards for evaluating functional significance of coronary stenosis. However, data are limited about outcomes in vessels with concordant and discordant physiological results, particularly with a ratio of distal coronary to aortic pressure (Pd/Pa) at rest.This was a single-center ...
Yuichi Saito, Tatsuro Yamazaki
exaly   +3 more sources

The role of gender in resting full-cycle ratio (RFR) guided coronary revascularization

International Journal of Cardiology
Gender-based differences in clinical outcomes of patients undergoing fractional flow reserved (FFR) guided coronary revascularization is well documented. This study aimed to compare resting full-cycle ratio (RFR) values between men and women and whether this translated into difference in clinical outcomes in patients who underwent RFR-guided coronary ...
Mina, Ghobrial, Bilal, Bawamia, Timothy, Cartlidge, Ian, Purcell, Alan, Bagnall, Mohamed, Farag, Mohammad, Alkhalil   +6 more
openaire   +2 more sources

A novel coronary angiographic index for predicting correlation between fractional flow reserve and resting full-cycle ratio

Coronary Artery Disease, 2023
Objectives The discordant results between fractional flow reserve (FFR) and resting full-cycle ratio (RFR) and the influence of angiographic characteristics on their correlation have not been sufficiently investigated. We aimed to identify angiographic characteristics that can predict FFR and RFR correlations using a novel ...
Hirofumi, Ohtani, Daisuke, Ueshima, Takuya, Kawakami, Yoshihiro, Hanyu, Kenji, Yoshioka, Akira, Mizukami, Akihiko, Matsumura, Tetsuo, Sasano   +7 more
openaire   +2 more sources

Comparison of vessel fractional flow reserve with invasive resting full-cycle ratio in patients with intermediate coronary lesions

International Journal of Cardiology, 2023
Vessel fractional flow reserve (vFFR) is a novel angiography-derived index for the assessment of myocardial ischemia without the need for pressure wires and hyperemic agents. vFFR has demonstrated very good diagnostic performance compared with the hyperemic index fractional flow reserve (FFR).
Philipp, Lake, Marcel, Halbach, Michelle, Kardasch, Victor, Mauri, Stephan, Baldus, Matti, Adam, Hendrik, Wienemann   +6 more
openaire   +2 more sources