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https://www.readbyqxmd.com/read/28544741/diagnostic-accuracy-of-a-hybrid-approach-of-instantaneous-wave-free-ratio-and-fractional-flow-reserve-using-high-dose-intracoronary-adenosine-to-characterize-intermediate-coronary-lesions-results-of-the-pals-practical-assessment-of-lesion-severity-prospective
#1
Fernando Rivero, Javier Cuesta, Teresa Bastante, Amparo Benedicto, Marcos García-Guimaraes, Manuel Fuentes-Ferrer, Teresa Alvarado, Fernando Alfonso
OBJECTIVES: We sought to investigate the diagnostic accuracy of instantaneous wave-free ratio (iFR) and high-dose intracoronary adenosine fractional flow reserve (IC-FFR) compared with classical intravenous adenosine fractional flow reserve (IV-FFR) to assess coronary stenosis severity. The usefulness of two hybrid strategies combining iFR and high-dose IC-FFR was also evaluated. BACKGROUND: Physiological assessment of intermediate coronary stenoses to guide revascularization is currently recommended...
May 22, 2017: Catheterization and Cardiovascular Interventions
https://www.readbyqxmd.com/read/28536897/validation-of-myocardial-perfusion-quantification-by-dynamic-ct-in-an-ex-vivo-porcine-heart-model
#2
Gert Jan Pelgrim, Marco Das, Sjoerd van Tuijl, Marly van Assen, Frits W Prinzen, Marco Stijnen, Matthijs Oudkerk, Joachim E Wildberger, Rozemarijn Vliegenthart
To test the accuracy of quantification of myocardial perfusion imaging (MPI) using computed tomography (CT) in ex-vivo porcine models. Five isolated porcine hearts were perfused according to Langendorff. Hearts were perfused using retrograde flow through the aorta and blood flow, blood pressure and heart rate were monitored throughout the experiment. An inflatable cuff was placed around the circumflex (Cx) artery to create stenosis grades which were monitored using a pressure wire, analysing perfusion at several fractional flow reserve values of 1...
May 23, 2017: International Journal of Cardiovascular Imaging
https://www.readbyqxmd.com/read/28521932/discordance-between-fractional-flow-reserve-and-coronary-flow-reserve-insights-from-intracoronary-imaging-and-physiological%C3%A2-assessment
#3
Sung Gyun Ahn, Jon Suh, Olivia Y Hung, Hee Su Lee, Yasir H Bouchi, Wenjie Zeng, Rounak Gandhi, Parham Eshtehardi, Bill D Gogas, Habib Samady
OBJECTIVES: The aim of this study was to investigate the epicardial and microvascular substrates associated with discordances between fractional flow reserve (FFR) and coronary flow reserve (CFR) values. BACKGROUND: Discordances between FFR and CFR remain poorly characterized. METHODS: FFR, hyperemic stenosis resistance (HSR), and intravascular ultrasound were performed as indexes of epicardial function and CFR and hyperemic microvascular resistance (HMR) as measures of microvascular function in 94 patients with moderate coronary stenosis...
May 22, 2017: JACC. Cardiovascular Interventions
https://www.readbyqxmd.com/read/28514756/elevated-crp-levels-predict-poor-outcome-and-tumor-recurrence-in-patients-with-thymic-epithelial-tumors-a-pro-and-retrospective-analysis
#4
Stefan Janik, Christine Bekos, Philipp Hacker, Thomas Raunegger, Bahil Ghanim, Elisa Einwallner, Lucian Beer, Walter Klepetko, Leonhard Müllauer, Hendrik J Ankersmit, Bernhard Moser
OBJECTIVE: Scarce information exists on the pathogenesis of thymic epithelial tumors (TETs), comprising thymomas, thymic carcinomas (TCs) and neuroendocrine tumors. C-reactive protein (CRP) increases during certain malignancies. We aimed to investigate the clinical relevance of CRP in patients with TETs. RESULTS: Pretreatment CRP serum concentrations were significantly elevated in patients with TETs, particularly TCs and metastatic TETs. After complete tumor resection CRP serum concentrations were decreased (p = 0...
April 27, 2017: Oncotarget
https://www.readbyqxmd.com/read/28456699/cutoff-value-and-long-term-prediction-of%C3%A2-clinical-events-by-ffr-measured-immediately-after-implantation-of-a-drug-eluting-stent-in-patients-with-coronary-artery-disease-1-to-3-year-results-from-the-dkcrush-vii-registry-study
#5
Sui-Ji Li, Zhen Ge, Jing Kan, Jun-Jie Zhang, Fei Ye, Tak W Kwan, Teguh Santoso, Song Yang, Imad Sheiban, Xue-Song Qian, Nai-Liang Tian, Tanveer S Rab, Ling Tao, Shao-Liang Chen
OBJECTIVES: This study aimed to investigate the cutoff of post-drug-eluting stent (DES) fractional flow reserve (FFR) for prediction of 1- to 3-year target vessel failure (TVF). BACKGROUND: FFR immediately after a DES implantation correlates with clinical events. However, the cutoff of post-DES FFR for predicting long-term clinical events remains understudied. METHODS: Between May 2012 and September 2013, a total of 1,476 patients who had FFR <0...
April 22, 2017: JACC. Cardiovascular Interventions
https://www.readbyqxmd.com/read/28454806/assessing-micro-vascular-resistances-via-imr-to-predict-outcome-in-stemi-patients-with-multivessel-disease-undergoing-primary-pci-amicro-rationale-and-design-of-a-prospective-multicenter-clinical-trial
#6
Massimo Fineschi, Edoardo Verna, Giuseppe Mezzapelle, Davide Bartolini, Giovanni Turiano, Antonio Manari, Katia Lucarelli, Lucia Uguccioni, Alessandra Repetto, Giuseppe Tarantini
BACKGROUND: In STEMI patients treated with primary percutaneous coronary angioplasty (PPCI) the evaluation of coronary microcirculatory resistance index (IMR) predict the extent of microvascular damage and left ventricular (LV) remodeling. However, the impact of IMR on the clinical outcome after PPCI in patients with multivessel disease (MVD) remains unsettled. AIM: We designed a prospective multicenter controlled clinical trial to evaluate the prognostic value of IMR in terms of clinical outcome and left ventricular remodeling in STEMI patients with MVD undergoing PPCI...
May 2017: American Heart Journal
https://www.readbyqxmd.com/read/28450667/one-year-outcome-of-fractional-flow-reserve-based-coronary-intervention-in-japanese-daily-practice%C3%A3-cvit-defer-registry
#7
Nobuhiro Tanaka, Masato Nakamura, Takashi Akasaka, Kazushige Kadota, Shirou Uemura, Tetsuya Amano, Nobuo Shiode, Yoshihiro Morino, Kenshi Fujii, Yutaka Hikichi
BACKGROUND: Clinical use of fractional flow reserve (FFR) has been rapidly increasing, but outcomes after FFR-based coronary intervention in Japanese daily clinical practice have not been well investigated.Methods and Results:The prospective multicenter cardiovascular intervention therapeutics registry (CVIT)-DEFER enrolled consecutive patients for whom FFR measurement was clinically indicated. This study comprised 3,857 vessels in 3,272 patients. Lesions were categorized into 4 groups according to FFR result and revascularization strategy: group 1: FFR >0...
April 26, 2017: Circulation Journal: Official Journal of the Japanese Circulation Society
https://www.readbyqxmd.com/read/28449028/surgical-therapy-of-thymic-tumours-with-pleural-involvement-an-ests-thymic-working-group-project
#8
Bernhard Moser, Elie Fadel, Dominique Fabre, Shaf Keshavjee, Marc de Perrot, Pascal Thomas, Geoffrey Brioude, Dirk Van Raemdonck, Sophie Viskens, Loic Lang-Lazdunski, Andrea Bille, Walter Weder, Wolfgang Jungraithmayr, Enrico Ruffini, Francesco Guerrera, David Gómez de Antonio, Moishe Liberman, Nuria Novoa, Marco Scarci, Stefan Janik, Walter Klepetko
OBJECTIVES: Surgery for thymic epithelial tumours (TETs) with pleural involvement is infrequently performed. Thus, the value of surgical therapy for primary or recurrent TETs with pleural involvement is not sufficiently defined yet. METHODS: Twelve institutions contributed retrospective data on 152 patients undergoing surgery (1977-2014) on behalf of the ESTS Thymic Working group. Outcome measures included overall (OS), cause-specific (CSS) and disease-free (DFS) survival as well as freedom from recurrence (FFR)...
April 25, 2017: European Journal of Cardio-thoracic Surgery
https://www.readbyqxmd.com/read/28436268/collateral-circulation-alters-downstream-hemodynamic-stress-caused-by-intracranial-atherosclerotic-stenosis
#9
Xin Liu, David Dornbos, Yuehua Pu, Xinyi Leng, Ligang Song, Baixue Jia, Yuesong Pan, David Wang, Zhongrong Miao, Yilong Wang, Liping Liu, Yongjun Wang
OBJECTIVES: Fractional flow reserve (FFR) accurately predicts the degree of stenosis and is now widely used to identify clinically significant severe coronary artery lesions. In the current study, we utilized a similar indicator, fractional flow (FF), to determine the hemodynamic impact of symptomatic intracranial atherosclerotic stenosis (ICAS) and to assess the correlation of FF with the severity of stenosis and collateral circulation. METHODS: Patients with symptomatic ICAS (70-99% stenosis) confirmed on digital subtraction angiography (DSA) were consecutively recruited...
June 2017: Neurological Research
https://www.readbyqxmd.com/read/28419280/fractional-flow-reserve-and-pressure-bounded-coronary-flow-reserve-to-predict-outcomes-in-coronary-artery-disease
#10
Jung-Min Ahn, Frederik M Zimmermann, Nils P Johnson, Eun-Seok Shin, Bon-Kwon Koo, Pil Hyung Lee, Duk-Woo Park, Soo-Jin Kang, Seung-Whan Lee, Young-Hak Kim, Cheol Whan Lee, Seong-Wook Park, Nico H J Pijls, Seung-Jung Park
Aims: Fractional flow reserve (FFR) has proven to its prognostic and therapeutic value. However, the additive prognostic value of coronary flow reserve (CFR) remains unclear. This study sought to investigate the clinical utility of combined FFR and CFR measurements to predict outcomes. Methods and results: Using the prospective, multicentre Interventional Cardiology Research Incooperation Society-FFR registry, a total of 2088 lesions from 1837 patients were included in this substudy...
April 17, 2017: European Heart Journal
https://www.readbyqxmd.com/read/28412436/noninvasive-ffr-derived-from-coronary-ct-angiography-management-and-outcomes-in-the-promise-trial
#11
Michael T Lu, Maros Ferencik, Rhonda S Roberts, Kerry L Lee, Alexander Ivanov, Elizabeth Adami, Daniel B Mark, Farouc A Jaffer, Jonathon A Leipsic, Pamela S Douglas, Udo Hoffmann
OBJECTIVES: The purpose of this study was to determine whether noninvasive fractional flow reserve derived from computed tomography (FFRCT) predicts coronary revascularization and outcomes and whether its addition improves efficiency of referral to invasive coronary angiography (ICA) after coronary computed tomography angiography (CTA). BACKGROUND: FFRCT may improve the efficiency of an anatomic CTA strategy for stable chest pain. METHODS: This observational cohort study included patients with stable chest pain in the PROMISE trial (PROspective Multicenter Imaging Study for Evaluation of Chest Pain) referred to ICA within 90 days after CTA...
April 7, 2017: JACC. Cardiovascular Imaging
https://www.readbyqxmd.com/read/28381739/a-comparison-between-the-instantaneous-wave-free-ratio-and-resting-distal-coronary-artery-pressure-aortic-pressure-and-the-fractional-flow-reserve-the-diagnostic-accuracy-can-be-improved-by-the-use-of-both-indices
#12
Nobuo Shiode, Tomokazu Okimoto, Hiromichi Tamekiyo, Tomoharu Kawase, Kenichi Yamane, Yuzo Kagawa, Yuto Fujii, Yusuke Ueda, Naoya Hironobe, Yasuko Kato, Yasuhiko Hayashi
Objectives The fractional flow reserve (FFR) is an index of the severity of coronary stenosis that has been clinically validated in several studies. The instantaneous wave-free ratio (iFR) and the resting distal coronary artery pressure/aortic pressure (Pd/Pa) are nonhyperemic pressure-derived indices of the severity of stenosis. This study sought to examine the diagnostic accuracy of the iFR and resting Pd/Pa with respect to hyperemic FFR. Methods Following an intracoronary injection of papaverine, the iFR, resting Pd/Pa, and FFR were continuously measured in 123 lesions in 103 patients with stable coronary disease...
2017: Internal Medicine
https://www.readbyqxmd.com/read/28365268/diagnostic-performance-of-resting-and-hyperemic-invasive-physiological-indices-to-define-myocardial-ischemia-validation-with-13-n-ammonia-positron-emission-tomography
#13
Doyeon Hwang, Ki-Hyun Jeon, Joo Myung Lee, Jonghanne Park, Chee Hae Kim, Yaliang Tong, Jinlong Zhang, Ji-In Bang, Minseok Suh, Jin Chul Paeng, Sang-Hoon Na, Gi Jeong Cheon, Christopher M Cook, Justin E Davies, Bon-Kwon Koo
OBJECTIVES: The authors sought to compare the diagnostic performance of fractional flow reserve (FFR), instantaneous wave-free ratio (iFR), and resting distal coronary artery pressure/aortic pressure (Pd/Pa) using (13)N-ammonia positron emission tomography (PET). BACKGROUND: The diagnostic performance of invasive physiological indices was reported to be different according to the reference to define the presence of myocardial ischemia. METHODS: A total of 115 consecutive patients with left anterior descending artery stenosis who underwent both (13)N-ammonia PET and invasive physiological measurement were included...
March 24, 2017: JACC. Cardiovascular Interventions
https://www.readbyqxmd.com/read/28362674/human-frequency-following-responses-to-vocoded-speech
#14
Saradha Ananthakrishnan, Xin Luo, Ananthanarayan Krishnan
OBJECTIVES: Vocoders offer an effective platform to simulate the effects of cochlear implant speech processing strategies in normal-hearing listeners. Several behavioral studies have examined the effects of varying spectral and temporal cues on vocoded speech perception; however, little is known about the neural indices of vocoded speech perception. Here, the scalp-recorded frequency following response (FFR) was used to study the effects of varying spectral and temporal cues on brainstem neural representation of specific acoustic cues, the temporal envelope periodicity related to fundamental frequency (F0) and temporal fine structure (TFS) related to formant and formant-related frequencies, as reflected in the phase-locked neural activity in response to vocoded speech...
March 30, 2017: Ear and Hearing
https://www.readbyqxmd.com/read/28357726/validation-of-the-smart-minimum-ffr-algorithm-in-an-unselected-all-comer-population-of-patients-with-intermediate-coronary-stenoses
#15
Barry Hennigan, Nils Johnson, John McClure, David Corcoran, Stuart Watkins, Colin Berry, Keith G Oldroyd
Using data from a commercial pressure wire system (St. Jude Medical) we previously developed an automated "smart" algorithm to determine a reproducible value for minimum FFR (smFFR) and confirmed that it correlated very closely with measurements made off-line by experienced coronary physiology core laboratories. In this study we used the same "smart" minimum algorithm to analyze data derived from a different, commercial pressure wire system (Philips Volcano) and compared the values obtained to both operator-defined steady state FFR and the online automated minimum FFR reported by the pressure wire analyser...
March 29, 2017: International Journal of Cardiovascular Imaging
https://www.readbyqxmd.com/read/28356440/fractional-flow-reserve-and-cardiac-events-in-coronary-artery-disease-data-from-a-prospective-registry
#16
Jung-Min Ahn, Duk-Woo Park, Eun-Seok Shin, Bon-Kwon Koo, Chang-Wook Nam, Joon-Hyung Doh, June Hong Kim, In-Ho Chae, Jung-Han Yoon, Sung-Ho Her, Ki-Bae Seung, Woo-Young Chung, Sang-Yong Yoo, Jin Bae Lee, Si Wan Choi, Kyungil Park, Taek Jong Hong, Sang Yeub Lee, Minkyu Han, Pil Hyung Lee, Soo-Jin Kang, Seung-Whan Lee, Young-Hak Kim, Cheol Whan Lee, Seong-Wook Park, Seung-Jung Park
Background -We evaluated the prognosis of deferred and revascularized coronary stenoses after FFR measurement to assess its revascularization threshold in clinical practice. Methods -The IRIS-FFR registry prospectively enrolled 5846 patients with at least one coronary lesion with FFR measurement. Revascularization was deferred in 6468 lesions and performed in 2165 lesions after FFR assessment. The primary endpoint was major adverse cardiac events (MACE; cardiac death, myocardial infarction, and repeat revascularization) at a median follow-up of 1...
March 29, 2017: Circulation
https://www.readbyqxmd.com/read/28331135/applicability-of-3-dimensional-quantitative-coronary-angiography-derived-computed-fractional-flow-reserve-for-intermediate-coronary-stenosis
#17
Kyoichiro Yazaki, Masato Otsuka, Shohei Kataoka, Mitsuru Kahata, Asako Kumagai, Koji Inoue, Hiroshi Koganei, Kenji Enta, Yasuhiro Ishii
BACKGROUND: Quantitative flow ratio (QFR) is a newly developed image-based index for estimating fractional flow reserve (FFR).Methods and Results:We analyzed 151 coronary arteries with intermediate stenosis in 142 patients undergoing wire-based FFR measurement using dedicated software. Predefined contrast flow QFR, which was derived from 3-dimensional quantitative coronary angiography (3-D QCA) withThrombolysis in Myocardial Infarction (TIMI) frame counts, was compared with FFR as a reference...
March 22, 2017: Circulation Journal: Official Journal of the Japanese Circulation Society
https://www.readbyqxmd.com/read/28318875/feasibility-of-pet-for-the-management-of-coronary-artery-disease-comparison-between-cfr-and-ffr
#18
REVIEW
Osamu Manabe, Masanao Naya, Nagara Tamaki
Myocardial perfusion imaging using positron emission tomography (PET) allows both qualitative and quantitative measurement. The quantitative myocardial blood flow and coronary flow reserve (CFR) are reliable indices for evaluating functional severity, influenced by both epicardial stenosis and microvascular disease. Fractional flow reserve (FFR) also reflects physiological stenosis, which measures the pressure differences across a coronary artery stenosis during maximum hyperemia. Discordance between CFR and FFR has been noticed in estimating the functional significance of coronary stenosis...
March 16, 2017: Journal of Cardiology
https://www.readbyqxmd.com/read/28318655/coronary-artery-stenoses-more-often-overestimated-in-older-patients-angiographic-stenosis-overestimation-in-elderly
#19
Nanette M Borren, Jan Paul Ottervanger, Martijn A Reinders, Elvin Kedhi
BACKGROUND: Angiographic overestimation of coronary artery stenosis severity may result in unnecessary revascularization and is possibly more prevalent with increasing age. AIM: To identify whether age is an independent clinical predictor for angiographic overestimation of a coronary artery stenosis. METHODS: Fractional flow reserve (FFR) of 335 coronary lesions was performed in 260 consecutive patients with stable coronary artery disease (CAD)...
February 28, 2017: International Journal of Cardiology
https://www.readbyqxmd.com/read/28317458/use-of-the-instantaneous-wave-free-ratio-or-fractional-flow-reserve-in-pci
#20
Justin E Davies, Sayan Sen, Hakim-Moulay Dehbi, Rasha Al-Lamee, Ricardo Petraco, Sukhjinder S Nijjer, Ravinay Bhindi, Sam J Lehman, Darren Walters, James Sapontis, Luc Janssens, Christiaan J Vrints, Ahmed Khashaba, Mika Laine, Eric Van Belle, Florian Krackhardt, Waldemar Bojara, Olaf Going, Tobias Härle, Ciro Indolfi, Giampaolo Niccoli, Flavo Ribichini, Nobuhiro Tanaka, Hiroyoshi Yokoi, Hiroaki Takashima, Yuetsu Kikuta, Andrejs Erglis, Hugo Vinhas, Pedro Canas Silva, Sérgio B Baptista, Ali Alghamdi, Farrel Hellig, Bon-Kwon Koo, Chang-Wook Nam, Eun-Seok Shin, Joon-Hyung Doh, Salvatore Brugaletta, Eduardo Alegria-Barrero, Martijin Meuwissen, Jan J Piek, Niels van Royen, Murat Sezer, Carlo Di Mario, Robert T Gerber, Iqbal S Malik, Andrew S P Sharp, Suneel Talwar, Kare Tang, Habib Samady, John Altman, Arnold H Seto, Jasvindar Singh, Allen Jeremias, Hitoshi Matsuo, Rajesh K Kharbanda, Manesh R Patel, Patrick Serruys, Javier Escaned
BACKGROUND: 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 those of FFR. METHODS: We randomly assigned 2492 patients with coronary artery disease, in a 1:1 ratio, to undergo either iFR-guided or FFR-guided coronary revascularization...
May 11, 2017: New England Journal of Medicine
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