Results 11 to 20 of about 7,221,304 (242)

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

Eur Heart J, 2019
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
Johnson NP, Li W, Chen X, Hennigan B, Watkins S, Berry C, Fearon WF, Oldroyd KG.   +7 more
europepmc   +6 more sources

Real-time use of instantaneous wave-free ratio: Results of the ADVISE in-practice: An international, multicenter evaluation of instantaneous wave-free ratio in clinical practice [PDF]

American Heart Journal, 2014
: Objectives To evaluate the first experience of real-time instantaneous wave-free ratio (iFR) measurement by clinicians. Background The iFR is a new vasodilator-free index of coronary stenosis severity, calculated as a trans-lesion pressure ratio during
Vrints, Christiaan, Haine, Steven, Gotberg, Matthias, Petraco, Ricardo, Al-Lamee, Rasha, et al.   +5 more
core   +10 more sources

Comparative analysis of instantaneous wave-free ratio and quantitative real-time myocardial contrast echocardiography for the assessment of myocardial perfusion [PDF]

Frontiers in Cardiovascular Medicine, 2022
Background and hypothesisThe field of coronary artery physiology is developing rapidly and changing the practice of interventional cardiology. A new functional evaluation technique using the instantaneous wave-free ratio (iFR) has become an alternative ...
Li Liang, Yongxiang Zhu, Fangfang Li, Kai Guo, Shang Chang, Qian Li, Yaojun Zhang, Dongye Li   +7 more
doaj   +2 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   +2 more sources

Reliability of Instantaneous Wave-Free Ratio (iFR) for the Evaluation of Left Main Coronary Artery Lesions. [PDF]

J Clin Med, 2019
The assessment of the left main coronary artery (LMCA) by coronary angiography has several limitations. The fractional flow reserve (FFR) is useful for the functional evaluation of LMCA stenoses.
De Rosa S, Polimeni A, De Velli G, Conte M, Sorrentino S, Spaccarotella C, Mongiardo A, Sabatino J, Contarini M, Indolfi C.   +9 more
europepmc   +5 more sources

The unbearable lightness of the instantaneous wave-free ratio/fractional flow reserve discordance

Journal of Cardiovascular Medicine, 2022
The unbearable lightness of the instantaneous wave-free ratio/fractional flow reserve ...
Matteo Tebaldi, Campo G., Gianluca Campo, Tebaldi M.   +3 more
core   +4 more sources

Rate Pressure Products Affect the Relationship between the Fractional Flow Reserve and Instantaneous Wave-Free Ratio [PDF]

Journal of Interventional Cardiology, 2020
The rate pressure product (RPP) is an index of myocardial metabolism that correlates closely with myocardial hemodynamics. The relationship between the RPP and the fractional flow reserve (FFR) and instantaneous wave-free ratio (iFR) is not known.
Suguru Ebihara, Hisao Otsuki, Hiroyuki Arashi, Junichi Yamaguchi, Nobuhisa Hagiwara   +4 more
doaj   +2 more sources

Diagnostic performance of deep learning and computational fluid dynamics-based instantaneous wave-free ratio derived from computed tomography angiography [PDF]

BMC Cardiovascular Disorders, 2022
Background and objectives Both fractional flow reserve (FFR) and instantaneous wave-free ratio (iFR) are widely used to evaluate ischemia-causing coronary lesions.
Jingyuan Zhang, Kun Xu, Yumeng Hu, Lin Yang, Xiaochang Leng, Hongfeng Jin, Yiming Tang, Xiaowei Liu, Chen Ye, Yitao Guo, Lei Wang, Jianjun Zhang, Yue Feng, Caiyun Mou, Lijiang Tang, Jianping Xiang, Changqing Du   +16 more
doaj   +2 more sources

Revascularization and Mortality at 5 Years After Treatment Guided By Instantaneous Wave‐Free Ratio and Fractional Flow Reserve: A Systematic Review and Meta‐Analysis of Randomized Controlled Trials [PDF]

Journal of the American Heart Association: Cardiovascular and Cerebrovascular Disease, 2023
Jayakumar Sreenivasan, Yasser Jamil, Yousif Ahmad   +2 more
doaj   +2 more sources

Evaluation of Myocardial Ischemia with iFR (Instantaneous Wave-Free Ratio in the Catheterization Laboratory: A Pilot Study [PDF]

Arquivos Brasileiros de Cardiologia, 2020
Background: The Instantaneous Wave-Free Ratio (iFR) is an invasive functional evaluation method that does not require vasoactive drugs to induce maximum hyperemia Objective: To evaluate the contribution of the iFR to the therapeutic decision-making of ...
Heitor Cruz Alves Vieira, Maria Cristina Meira Ferreira, Leonardo Cruz Nunes, Carlos José Francisco Cardoso, Emilia Matos do Nascimento, Gláucia Maria Moraes de Oliveira   +5 more
doaj   +4 more sources