Results 51 to 60 of about 152,141 (297)

Novel Humanized Biosimulator to Predict Coronary Obstruction in High-Risk Valve-in-Valve Procedures

JACC: Case Reports, 2023
We developed humanized biosimulator to predict the risk of coronary obstruction among high-risk patients undergoing valve-in-valve (ViV) procedures. In this case, based on unchanged instantaneous wave-free ratio values measured during a ViV simulation ...
Nils Perrin, MD, Guillaume Bonnet, MD, Réda Ibrahim, MD, Raoul Bonan, MD, Lionel Leroux, MD, Juan F. Granada, MD, Jean Claude Tardif, MD, Thomas Modine, MD, PhD, MBA, Walid Ben Ali, MD, PhD   +8 more
doaj   +1 more source

Safety of the Deferral of Coronary Revascularization on the Basis of Instantaneous Wave-Free Ratio and Fractional Flow Reserve Measurements in Stable Coronary Artery Disease and Acute Coronary Syndromes. [PDF]

, 2018
OBJECTIVES: The aim of this study was to investigate the clinical outcomes of patients deferred from coronary revascularization on the basis of instantaneous wave-free ratio (iFR) or fractional flow reserve (FFR) measurements in stable angina pectoris ...
Al-Lamee, R, Alegria-Barrero, E, Alghamdi, A, Altman, J, Ambrosia, A, Baptista, SB, Bertilsson, M, et al., Cook, CM, Dehbi, HM, Escaned, J, Mejía-Rentería, H, Ryan, N   +11 more
core   +1 more source

First-in-Man Percutaneous Coronary Intervention Using Instantaneous Wave-Free Ratio Roadmap Functionality With Instantaneous Wave-Free Ratio Scout Pullback

JACC: Cardiovascular Interventions, 2018
A 54-year-old male patient presented with a symptomatic bifurcation lesion of 75% stenosis in LAD ([Figure 1A][1]). Physiological evaluation was performed using instantaneous wave-free ratio (iFR) roadmap (Philips Healthcare, Best, the Netherlands) functionality [(1)][2].
Takayuki, Yabe, Toshiya, Muramatsu, Reiko, Tsukahara, Masatsugu, Nakano, Satoru, Nishio, Yukako, Takimura, Hideyuki, Takimura, Mami, Kawano, Tasuku, Hada   +8 more
openaire   +2 more sources

ECG-Independent Calculation of Instantaneous Wave-Free Ratio

JACC: Cardiovascular Interventions, 2015
The instantaneous wave-free ratio (iFR) is a recently developed invasive index of coronary disease severity that simplifies stenosis assessment by eliminating the need for vasodilator administration [(1–4)][1].
Petraco, Ricardo, Sen, Sayan, Nijjer, Sukhjinder, Malik, Iqbal S., Mikhail, Ghada W., Al-Lamee, Rasha, Cook, Christopher, Baker, Christopher, Kaprielian, Raffi, Foale, Rodney A., Mayet, Jamil, Francis, Darrel P., Davies, Justin E.   +12 more
openaire   +1 more source

Meta-analysis of death and myocardial infarction in the DEFINE-FLAIR and iFR-SWEDEHEART trials: a hypothesis generating note of caution [PDF]

, 2017
In patients with coronary heart disease, revascularization can improve symptoms and in certain high-risk subgroups may improve prognosis. Coronary angiography provides anatomical information and the physiological significance of a stenosis can be ...
Berry, Colin, McClure, John D., Oldroyd, Keith G.   +2 more
core   +1 more source

Diagnostic accuracy of instantaneous wave free‐ratio in clinical practice

Journal of Interventional Cardiology, 2017
AimsTo evaluate the correlation between iFR and FFR in real‐world clinical practice.Methods and ResultsRetrospective, single‐centre study of 229 consecutive pressure‐wire studies (np = 158). Real‐time iFR and FFR measurements were performed for angiographically borderline stenoses.
Wern Yew Ding, Satheesh Nair, Clare Appleby   +2 more
openaire   +2 more sources

The inter-study reproducibility of instantaneous wave-free ratio and angiography coregistration [PDF]

Journal of Cardiology, 2020
Coregistration system of instantaneous wave-free ratio (iFR) pullback and angiography has been developed to enhance benefits of physiology oriented percutaneous coronary intervention (PCI), but its reproducibility has not yet been fully assessed.In 51 coronary arteries from 39 patients with stable coronary artery disease, iFR angio-coregistrations were
Daisuke Higashioka, Yasutsugu Shiono, Takashi Kubo, Hironori Kitabata, Takahiro Nishi, Kosei Terada, Hiroki Emori, Masahiro Takahata, Teruaki Wada, Kunihiro Shimamura, Yoshiki Matsuo, Yasushi Ino, Atsushi Tanaka, Takeshi Hozumi, Takashi Akasaka   +14 more
openaire   +2 more sources

Reannihilation of self-interacting dark matter [PDF]

, 2018
We explore the phenomenology of having a second epoch of dark matter annihilation into dark radiation long after the standard thermal freeze-out. Such a hidden reannihilation process could affect visible sectors only gravitationally.
Binder, Tobias, Gustafsson, Michael, Kamada, Ayuki, Sandner, Stefan Marinus Rodrigues, Wiesner, Max   +4 more
core   +3 more sources

Laser anemometer measurements of trailing vortices in water [PDF]

, 1974
A series of measurements of trailing vortices behind lifting hydrofoils is described. These measurements were made in the Caltech Free-Surface Water Tunnel, using a laser-Doppler velocimeter to measure two components of velocity in the vortex wake.
Baker, G. R., Barker, S. J., Bofah, K. K., Saffman, P. G.   +3 more
core   +1 more source

Is the Instantaneous Wave-Free Ratio Equivalent to Fractional Flow Reserve?

Journal of the American College of Cardiology, 2013
We read the paper by Sen et al. [(1)][1] with great interest; the study was designed to explore whether the instantaneous wave-free ratio (iFR) was an adenosine-free alternative to fractional flow reserve (FFR) for the assessment of coronary stenosis.
Fan, Guo-Xin, Xu, Ya-Wei
openaire   +2 more sources