Results 1 to 10 of about 152,362 (259)

Diagnostic Agreement of Quantitative Flow Ratio With Fractional Flow Reserve and Instantaneous Wave‐Free Ratio [PDF]

Journal of the American Heart Association: Cardiovascular and Cerebrovascular Disease, 2019
Background Quantitative flow ratio (QFR) has a high diagnostic accuracy in assessing functional stenoses relevance, as judged by fractional flow reserve (FFR). However, its diagnostic performance has not been thoroughly evaluated using instantaneous wave‐
Doyeon Hwang, Ki Hong Choi, Joo Myung Lee, Hernán Mejía‐Rentería, Jihoon Kim, Jonghanne Park, Tae‐Min Rhee, Ki‐Hyun Jeon, Hyun‐Jong Lee, Hyun Kuk Kim, Taek Kyu Park, Jeong Hoon Yang, Young Bin Song, Eun‐Seok Shin, Chang‐Wook Nam, Jae‐Jin Kwak, Joon‐Hyung Doh, Joo‐Yong Hahn, Jin‐Ho Choi, Seung‐Hyuk Choi, Javier Escaned, Bon‐Kwon Koo, Hyeon‐Cheol Gwon   +22 more
doaj   +6 more sources

Use of the Instantaneous Wave-free Ratio or Fractional Flow Reserve in PCI [PDF]

New England Journal of Medicine, 2017
Coronary revascularization guided by fractional flow reserve (FFR) is associated with better patient outcomes after the procedure than revascularization guided by angiography alone. It is unknown whether the instantaneous wave-free ratio (iFR), an alternative measure that does not require the administration of adenosine, will offer benefits similar to ...
Davies, J. E., Sen, S., Dehbi, H. -M., Al-Lamee, R., Petraco, R., Nijjer, S. S., Bhindi, R., Lehman, S. J., Walters, D., Sapontis, J., Janssens, L., Vrints, C. J., Khashaba, A., Laine, M., Van Belle, E., Krackhardt, F., Bojara, W., Going, O., Härle, T., Indolfi, C., Niccoli, G., Ribichini, F., Tanaka, N., Yokoi, H., Takashima, H., Kikuta, Y., Erglis, A., Vinhas, H., Canas Silva, P., Baptista, S. B., Alghamdi, A., Hellig, F., Koo, B. -K., Nam, C. -W., Shin, E. -S., Doh, J. -H., Brugaletta, S., Alegria-Barrero, E., Meuwissen, M., Piek, J. J., Van Royen, N., Sezer, M., Di Mario, C., Gerber, R. T., Malik, I. S., Sharp, A. S. P., Talwar, S., Tang, K., Samady, H., Altman, J., Seto, A. H., Singh, J., Jeremias, A., Matsuo, H., Kharbanda, R. K., Patel, M. R., Serruys, P., Escaned, J.   +57 more
core   +15 more sources

Clinical Outcome of Revascularization Deferral With Instantaneous Wave‐Free Ratio and Fractional Flow Reserve: A 5‐Year Follow‐Up Substudy From the iFR‐SWEDEHEART Trial [PDF]

Journal of the American Heart Association: Cardiovascular and Cerebrovascular Disease, 2023
Background Although physiology‐based assessment of coronary artery stenosis using instantaneous wave‐free ratio (iFR) and fractional flow reserve (FFR) are established methods of guiding coronary revascularization, its clinical outcome in long‐term ...
Karolina Berntorp, Rebecca Rylance, Troels Yndigegn, Sasha Koul, Ole Fröbert, Evald H. Christiansen, David Erlinge, Matthias Götberg   +7 more
doaj   +4 more sources

Long‐Term Clinical Outcomes of Nonhyperemic Pressure Ratios: Resting Full‐Cycle Ratio, Diastolic Pressure Ratio, and Instantaneous Wave‐Free Ratio [PDF]

Journal of the American Heart Association: Cardiovascular and Cerebrovascular Disease, 2020
Background Nonhyperemic pressure ratios (NHPRs) such as instantaneous wave‐free ratio, resting full‐cycle ratio, or diastolic pressure ratio have emerged as invasive physiologic indices precluding the need for hyperemic agents.
Joo Myung Lee, Seung Hun Lee, Doyeon Hwang, Tae-Min Rhee, Ki Hong Choi, Jinseob Kim, Jinhyoung Park, Hyung Yoon Kim, Hae Won Jung, Yun-Kyeong Cho, Hyuck-Jun Yoon, Young Bin Song, Joo-Yong Hahn, Chang-Wook Nam, Eun-Seok Shin, Joon-Hyung Doh, Seung-Ho Hur, Bon-Kwon Koo   +17 more
doaj   +4 more sources

DFENet: Deep Feature Enhancement Network for Accurate Calculation of Instantaneous Wave-Free Ratio [PDF]

IEEE Journal of Translational Engineering in Health and Medicine, 2020
Accurate iFR calculation can provide important clinical information for intracoronary functional assessment without administration of adenosine, which needs to locate object points in the pressure waveforms: peak, the dichrotic notch and the pressure ...
Jiping Li, Liang Song, Heye Zhang
doaj   +5 more sources

Diastolic pressure ratio: new approach and validation vs. the instantaneous wave-free ratio. [PDF]

Eur Heart J, 2019
Abstract Aims The instantaneous wave-free ratio (iFR) and whole-cycle Pd/Pa investigate coronary physiology during non-hyperaemic conditions. To test for unique physiologic properties of the wave-free period when making resting coronary pressure measurements, we compared post hoc a diastolic pressure ...
Johnson NP, Li W, Chen X, Hennigan B, Watkins S, Berry C, Fearon WF, Oldroyd KG.   +7 more
europepmc   +6 more sources

Understanding Fractional Flow Reserve/Instantaneous Wave‐Free Ratio Discordance Can Provide Coronary Clarity [PDF]

Journal of the American Heart Association: Cardiovascular and Cerebrovascular Disease, 2022
David M. Tehrani, Arnold H. Seto
doaj   +4 more sources

Differential predictability for high-risk plaque characteristics between fractional flow reserve and instantaneous wave-free ratio [PDF]

Scientific Reports, 2023
To evaluate the differential associations of high-risk plaque characteristics (HRPC) with resting or hyperemic physiologic indexes (instantaneous wave-free ratio [iFR] or fractional flow reserve [FFR]), a total of 214 vessels from 127 patients with ...
Joo Myung Lee, Doosup Shin, Seung Hun Lee, Ki Hong Choi, Sung Mok Kim, Eun Ju Chun, Kwan Yong Lee, Doyeon Hwang, Sung Gyun Ahn, Adam J. Brown, Hernán Mejía-Rentería, Adrien Lefieux, David Molony, Kiyuk Chang, Tsunekazu Kakuta, Javier Escaned, Habib Samady   +16 more
doaj   +2 more sources

Fractional Flow Reserve and Instantaneous Wave‐Free Ratio Predict Pathological Wall Shear Stress in Coronary Arteries: Implications for Understanding the Pathophysiological Impact of Functionally Significant Coronary Stenoses [PDF]

Journal of the American Heart Association: Cardiovascular and Cerebrovascular Disease, 2022
Background The pathophysiological mechanism behind adverse outcomes associated with ischemia‐inducing epicardial coronary stenoses and microcirculatory dysfunction remains unclear. Wall shear stress (WSS) plays an important role in atherosclerotic plaque
Christopher C. Y. Wong, Ashkan Javadzadegan, Cuneyt Ada, Jerrett K. Lau, Ravinay Bhindi, William F. Fearon, Leonard Kritharides, Martin K. C. Ng, Andy S. C. Yong   +8 more
doaj   +2 more sources

The reasons why fractional flow reserve and instantaneous wave-free ratio are similar using wave separation analysis [PDF]

BMC Cardiovascular Disorders, 2021
Background and objectives Fractional flow reserve (FFR) and instantaneous wave-free ratio (iFR) are the two most commonly used coronary indices of physiological stenosis severity based on pressure. To minimize the effect of wedge pressure (P wedge ), FFR
Soohong Min, Gwansuk Kang, Dong-Guk Paeng, Joon Hyouk Choi   +3 more
doaj   +2 more sources