نتایج جستجو برای: excision cavity volume ecv

تعداد نتایج: 430310  

Journal: :Circulation. Cardiovascular imaging 2016
Franz Duca Andreas A Kammerlander Caroline Zotter-Tufaro Stefan Aschauer Marianne L Schwaiger Beatrice A Marzluf Diana Bonderman Julia Mascherbauer

BACKGROUND Myocardial extracellular volume (ECV) accumulation is one of the key pathophysiologic features of heart failure with preserved ejection fraction (HFpEF). Our aims were to (1) measure ECV by cardiac magnetic resonance T1 mapping using the modified Look-Locker inversion recovery (MOLLI) sequence, (2) validate MOLLI-ECV against histology, and (3) investigate the relationship between MOL...

2015
Shi-Jun Zhang Shenghong Ju

Background Extracellular volume fraction (ECV) has been applied to the detection of diffuse myocardial interstitial fibrosis or exudative pathologic changes in various clinical settings, but there is lack of study to date concerning the significance of ECV at the early phase of left ventricular remodeling. We intended to assess myocardial ECV in essential hypertension and to study the implicati...

2013
Tomas G Neilan Francois-Pierre Mongeon Otavio R Coelho-Filho Ravi Shah Ciaran J McMullan Siddique Abbasi Eri Watanabe Bobby Heydari Ron Blankstein Raymond Y Kwong Michael Jerosch-Herold

Background Hypertension is associated with the development of myocardial fibrosis with a subsequent increase in the myocardial extracellular volume (ECV). T1 measurements pre and post a contrast cardiac magnetic resonance (CMR) study provide a robust non-invasive method for quantification of the ECV. We aimed to determine whether the CMR-derived ECV can differentiate healthy volunteers from pat...

2015
Sanjay M. Banypersad Marianna Fontana Viviana Maestrini Daniel M. Sado Gabriella Captur Aviva Petrie Stefan K. Piechnik Carol J. Whelan Anna S. Herrey Julian D. Gillmore Helen J. Lachmann Ashutosh D. Wechalekar Philip N. Hawkins James C. Moon

AIMS To assess the prognostic value of myocardial pre-contrast T1 and extracellular volume (ECV) in systemic amyloid light-chain (AL) amyloidosis using cardiovascular magnetic resonance (CMR) T1 mapping. METHODS AND RESULTS One hundred patients underwent CMR and T1 mapping pre- and post-contrast. Myocardial ECV was calculated at contrast equilibrium (ECV(i)) and 15 min post-bolus (ECVb). Fift...

Journal: :JACC. Cardiovascular imaging 2013
Steven K White Daniel M Sado Marianna Fontana Sanjay M Banypersad Viviana Maestrini Andrew S Flett Stefan K Piechnik Matthew D Robson Derek J Hausenloy Amir M Sheikh Philip N Hawkins James C Moon

OBJECTIVES The aim of this study was to determine the accuracy of the contrast "bolus only" T1 mapping cardiac magnetic resonance (CMR) technique for measuring myocardial extracellular volume fraction (ECV). BACKGROUND Myocardial ECV can be measured with T1 mapping before and after contrast agent if the contrast agent distribution between blood/myocardium is at equilibrium. Equilibrium distri...

Journal: :European heart journal 2012
Martin Ugander Abiola J Oki Li-Yueh Hsu Peter Kellman Andreas Greiser Anthony H Aletras Christopher T Sibley Marcus Y Chen W Patricia Bandettini Andrew E Arai

AIMS Conventional late gadolinium enhancement (LGE) cardiac magnetic resonance can detect myocardial infarction and some forms of non-ischaemic myocardial fibrosis. However, quantitative imaging of extracellular volume fraction (ECV) may be able to detect subtle abnormalities such as diffuse fibrosis or post-infarct remodelling of remote myocardium. The aims were (1) to measure ECV in myocardia...

Journal: :European heart journal 2014
Timothy C Wong Kayla M Piehler Ian A Kang Ajay Kadakkal Peter Kellman David S Schwartzman Suresh R Mulukutla Marc A Simon Sanjeev G Shroff Lewis H Kuller Erik B Schelbert

AIMS Diabetes may promote myocardial extracellular matrix (ECM) expansion that increases vulnerability. We hypothesized that: (i) type 2 diabetes would be associated with quantitative cardiovascular magnetic resonance (CMR) measures of myocardial ECM expansion, i.e. extracellular volume fraction (ECV); (ii) medications blocking the renin-angiotensin-aldosterone system (RAAS) would be associated...

2018
Sean Robison Gauri Rani Karur Rachel M. Wald Paaladinesh Thavendiranathan Andrew M. Crean Kate Hanneman

BACKGROUND Calculation of cardiovascular magnetic resonance (CMR) extracellular volume (ECV) requires input of hematocrit, which may not be readily available. The purpose of this study was to evaluate the diagnostic accuracy of ECV calculated using various noninvasive measures of hematocrit compared to ECV calculated with input of laboratory hematocrit as the reference standard. METHODS One h...

2016
Naveen Rajpurohit Zhen Qian Shizhen Liu Robi Goswami Ashish Kabra Venkateshwar Polsani Mani Vannan

Background Myocardial extracellular volume (ECV) quantification by cardiovascular magnetic resonance (CMR) T1 mapping technique has shown great promises in detecting diffuse fibrosis and interstitial diseases of the myocardium. In hypertensive and left ventricle hypertrophy (LVH) patients, increased ECV has been found to be associated with impaired myocardial strain, which is an early indicator...

2016
Elizabeth Jenista David C Wendell Han W Kim Dina Labib Sung-A Chang Wolfgang G Rehwald Enn-Ling Chen Michele Parker Raymond Kim

Background Delineation of diseased and normal tissue is fundamental to identifying cardiac pathology. Studies suggest that parametric extracellular volume fraction (ECV) imaging is superior to conventional delayed enhancement for detection of diffuse, global myocardial disease. Conversely, the sensitivity of ECV for the detection of focal disorders is unclear. This may be important for subendoc...

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