Results 271 to 280 of about 20,267 (309)

Personalised fractional flow reserve: a novel concept to optimise myocardial revascularisation

EuroIntervention, 2019
Fractional flow reserve (FFR) represents the percentage reduction in coronary flow relative to a hypothetically normal artery; however, percutaneous coronary intervention (PCI) seldom achieves physiological normality (FFR 1.00), particularly in the context of diffuse disease.
Rebecca C, Gosling, Paul D, Morris, Patricia V, Lawford, D Rodney, Hose, Julian P, Gunn   +4 more
openaire   +2 more sources

Impact of Right Atrial Pressure on Fractional Flow Reserve Measurements: Comparison of Fractional Flow Reserve and Myocardial Fractional Flow Reserve in 1,600 Coronary Stenoses.

JACC. Cardiovascular interventions, 2016
This study sought to assess the impact of a wide range of mean right atrial pressure (Pra) on fractional flow reserve (FFR) measurements.FFR invasively assesses the ischemic potential of coronary stenoses. FFR is calculated as the ratio of mean distal coronary pressure (Pd) to mean aortic pressure (Pa) during maximal hyperemia. The Pra is considered to
Toth, Gabor G, De Bruyne, Bernard, Rusinaru, Dan, DI GIOIA, GIUSEPPE, Bartunek, Jozef, PELLICANO, MARIANO, Vanderheyden, Marc, Adjedj, Julien, Wijns, William, Pijls, Nico H. J, BARBATO, EMANUELE   +10 more
openaire   +4 more sources

Interpretation of fractional flow reserve in ST-elevation myocardial infarction culprit lesions

Coronary Artery Disease, 2015
Pressure wire assessment of the infarct-related artery (IRA) in ST-elevation myocardial infarction (STEMI) is not recommended until microcirculatory dysfunction recovers.The objective of this study was to assess serial fractional flow reserve (FFR) and the index of microcirculatory resistance (IMR) in the IRA of STEMI patients to better understand and ...
Stephen P, Hoole, Adam J, Brown, Catherine, Jaworski, Liam M, McCormick, Sarah C, Clarke, Nick E J, West   +5 more
openaire   +2 more sources

Handgrip-enhanced myocardial fractional flow reserve for assessment of coronary artery stenoses

American Heart Journal, 2006
Fractional flow reserve (FFR) may yield false-negative results in up to 12% of lesions tested, and there is a zone of uncertainty at borderline values.Forty-eight patients were investigated by means of dobutamine stress echocardiography (DSE), coronary angiography, and FFR assessment of 48 coronary lesions before, during, and immediately after handgrip
Demosthenes G, Katritsis, Socrates, Korovesis, Evangelia, Karvouni, Eleftherios, Giazitzoglou, Ilias, Karabinos, Efthalia, Tzanalaridou, Demosthenes, Panagiotakos, Michael M, Webb-Peploe   +7 more
openaire   +2 more sources

Accuracy and usefulness of noninvasive fractional flow reserve from computed tomographic coronary angiography: comparison with myocardial perfusion imaging, echocardiographic coronary flow reserve, and invasive fractional flow reserve

Cardiovascular Intervention and Therapeutics, 2015
We present a case of coronary artery disease with intermediate stenosis in the proximal left anterior descending artery, which was evaluated using multiple functional modalities. FFRCT demonstrated a significant perfusion abnormality in the LAD, and the value of FFRCT (0.68) was similar to the value measured by invasive FFR (0.67).
Eiji, Taguchi, Koichi, Nakao, Kyoko, Hirakawa, Takashi, Fukunaga, Shinzo, Miyamoto, Tomohiro, Sakamoto   +5 more
openaire   +2 more sources

Fractional Flow Reserve

Circulation, 1995
Background Fractional flow reserve (FFR), defined as the ratio of maximum flow in the presence of a stenosis to normal maximum flow, is a lesion-specific index of stenosis severity that can be calculated by simultaneous measurement of mean arterial, distal coronary, and central venous pressure (P a , P
N H, Pijls, B, Van Gelder, P, Van der Voort, K, Peels, F A, Bracke, H J, Bonnier, M I, el Gamal   +6 more
openaire   +2 more sources

Measurement of myocardial fractional flow reserve during coronary angioplasty in patients with old myocardial infarction

Catheterization and Cardiovascular Diagnosis, 1997
Although myocardial fractional flow reserve (FFRmyo) has been demonstrated to be a useful index for determining functional significance of coronary stenosis, the data in previous studies was derived from a highly selected group of patients. The aim of this study was to investigate the value of FFRmyo in a more clinically relevant group of patients ...
M, Takeuchi, E, Himeno, S, Sonoda, Y, Nakashima, A, Kuroiwa   +4 more
openaire   +2 more sources

Fractional Flow Reserve—Dichotomous Decisions in Myocardial Ischemia

Circulation: Cardiovascular Interventions, 2022
Ole Frøbert, Matthias Götberg
openaire   +3 more sources

The temporal recovery of fractional flow reserve, coronary flow reserve and index of microcirculatory resistance following myocardial infarction

Current Opinion in Cardiology, 2015
The purpose of this review was to summarize the healing processes after myocardial infarction (MI) and to relate these temporal changes to data from serial imaging obtained by cardiac magnetic resonance, and then to relate these findings to the invasive measures of the indices of coronary physiology (e.g., fractional flow reserve, coronary flow reserve
Giovanni Luigi, De Maria, Gregor, Fahrni, Adrian P, Banning   +2 more
openaire   +2 more sources

Reasons and implications of agreements and disagreements between coronary flow reserve, fractional flow reserve, and myocardial perfusion imaging

Journal of Nuclear Cardiology, 2018
Information on coronary physiology and myocardial blood flow (MBF) in patients with suspected angina is increasingly important to inform treatment decisions. A number of different techniques including myocardial perfusion imaging (MPI), noninvasive estimation of MBF, and coronary flow reserve (CFR), as well as invasive methods for CFR and fractional ...
Manish, Motwani, Mahsaw, Motlagh, Anuj, Gupta, Daniel S, Berman, Piotr J, Slomka   +4 more
openaire   +2 more sources