Instantaneous Wave-Free Ratio (iFR)

Original Contribution

Validation of a New Non-Hyperemic Physiological Index: The Constant-Resistance Ratio (cRR)

03/27/2024

Chenguang Li, MD, PhD¹; Jing Wu, MS²; Jiayan Lin, BS³; Yizhe Wu, MD, PhD¹; Rende Xu, MD, PhD¹; Juying Qian, MD, PhD¹; William Kongto Hau, PhD⁴; Emanuele Barbato, MD, PhD^5,6; Nils P. Johnson, MD, MS^7,8; Barry Hennigan, MBBChBAO, BMedSci⁹; Colin Berry, MBChB, MD, PhD^9,10; Keith G. Oldroyd, MBChB, MD (Hons)⁹; Liang Song, PhD³; Junbo Ge, MD, PhD¹

Chenguang Li, MD, PhD1; Jing Wu, MS2;...

The authors aim to validate a new resting index, the constant resistance ratio (cRR), by retrospectively calculating the cRR values from raw pressure waveforms collected from the CONTRAST and VERIFY 2 studies and comparing these results with...

The authors aim to validate a...

03/27/2024

Journal of Invasive Cardiology

Original Contribution

Coronary Physiology Instantaneous Wave-Free Ratio (iFR) Derived From X-Ray Angiography Using Artificial Intelligence Deep Learning Models: A Pilot Study

02/21/2024

Arlindo L. Oliveira , PhD;

Fausto J. Pinto , PhD;

Miguel Nobre Menezes , MD, MSc;

Joao Lourenco Silva , MSc;

Beatriz Silva , MD;

Rita Marante de Oliveira , BSc;

Tiago Rodrigues , MD;

In this pilot study, the authors aimed to develop fully automated artificial intelligence models capable of binary instantaneous free-wave ratio (iFR) lesion classification from coronary angiography images alone, using measured invasive iFR...

In this pilot study, the authors...

02/21/2024

Journal of Invasive Cardiology

Original Contribution

iFR/FFR/IVUS Discordance and Clinical Implications: Results From the Prospective Left Main Physiology Registry

05/01/2023

Luc Janssens , MD;

Johan Bennett , MD, PhD;

Panos Xaplanteris , MD;

Claudiu Ungureanu , MD;

Yoann Bataille , MD, PhD;

Peter Kayaert , PhD, MD;

Oscar Semeraro , MD;

Benny Drieghe , MD;

Joelle Kefer , MD, PhD;

Marc J. Claeys , MD, PhD;

Keir McCutcheon , MD, PhD;

Mathieu Coeman , MD;

Sofie Gevaert , MD, PhD;

Michel De Pauw , MD, PhD;

Steven Haine , MD, PhD;

Chadi Ghafari , MD;

Peter Gheeraert , MD, PhD;

Joseph "Jo" Dens , MD, PhD;

Bert Vandeloo , MD;

Stephane G. Carlier , MD, PhD;

Vincent Flore , MD, PhD;

Kurt Hermans , MD;

Georges Saad , MD;

This study aimed to assess discordance between results instantaneous wave-free ratio, fractional flow reserve, and intravascular ultrasound in intermediate left main coronary lesions.

This study aimed to assess...

05/01/2023

Journal of Invasive Cardiology

Resting Physiological Indices: Can We Use the Generic Pd/Pa?

09/05/2019

Robert J. Widmer , MD, PhD;

Morton J. Kern , MD, MSCAI, FACC, FAHA;

Now with the wide availability of both hyperemic (FFR) and non-hyperemic translesional pressure ratios (NHPRs), the question becomes, how to select which ratio to use and when to use it? In addition, what does the lab do when it does not have...

Now with the wide availability...

09/05/2019

Cath Lab Digest

Clinical Editor's Corner

Revisiting Best Practices for an Accurate FFR and Non-Hyperemic Pressure Ratios (NHPR)

09/04/2018

Morton J. Kern , MD, MSCAI, FACC, FAHA;

“When is the right time to accept the fractional flow reserve (FFR) during the adenosine hyperemic recording?” I thought this issue had been settled a few years ago, but after speaking with Arnold, we thought we should revisit some of the...

“When is the right time to...

09/04/2018

Cath Lab Digest