Results 41 to 50 of about 152,362 (259)

Influence of contrast media dose and osmolality on the diagnostic performance of contrast fractional flow reserve [PDF]

, 2017
Background—Contrast fractional flow reserve (cFFR) is a method for assessing functional significance of coronary stenoses, which is more accurate than resting indices and does not require adenosine.
Berry, Colin, Choi, Dong-Hyun, De Bruyne, Bernard, Fearon, William F., Gould, K. Lance, Jeremias, Allen, Johnson, Nils P., Kobayashi, Yuhei, Nishi, Takeshi, Oldroyd, Keith G., Pijls, Nico H.J.   +10 more
core   +1 more source

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

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

The influence of non-equilibrium dissociation on the flow produced by shock impingement on a blunt body [PDF]

, 2004
We describe an investigation of the effects of non-equilibrium thermochemistry on the interaction between a weak oblique shock and the strong bow shock formed by a blunt body in hypersonic flow.
Hornung, H. G., Sanderson, S. R., Sturtevant, B.   +2 more
core   +1 more source

Change in instantaneous wave-free ratio in the donor artery in multivessel coronary disease: a case report

Российский кардиологический журнал, 2022
Patients with multivessel coronary artery disease require an individual approach when choosing tactics for myocardial revascularization. In some cases, additional methods for assessing the stenosis significance should be used, such as measuring the ...
F. B. Shukurov, T. P. Baronets, B. A. Rudenko, D. K. Vasiliev, D. A. Feshchenko   +4 more
doaj   +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

Measurement and modeling of solitary wave induced bed shear stress over a rough bed [PDF]

, 2012
Bed shear stresses generated by solitary waves were measured using a shear cell apparatus over a rough bed in laminar and transitional flow regimes (~7600 < Re < ~60200).
Baldock, Tom E., Seelam, Jaya Kumar
core   +1 more source

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