نتایج جستجو برای: excision cavity volume ecv

تعداد نتایج: 430310  

2012
Nadine Kawel Marcelo Nacif Anna Zavodni Jacquin Jones Songtao Liu Christopher T Sibley David A Bluemke

PURPOSE Myocardial T1 relaxation time (T1 time) and extracellular volume fraction (ECV) are altered in patients with diffuse myocardial fibrosis. The purpose of this study was to perform an intra-individual assessment of normal T1 time and ECV for two different contrast agents. METHODS A modified Look-Locker Inversion Recovery (MOLLI) sequence was acquired at 3 T in 24 healthy subjects (8 men...

Journal: :Circulation. Cardiovascular imaging 2013
Carolyn Y Ho Siddique A Abbasi Tomas G Neilan Ravi V Shah Yucheng Chen Bobak Heydari Allison L Cirino Neal K Lakdawala E John Orav Arantxa González Begoña López Javier Díez Michael Jerosch-Herold Raymond Y Kwong

BACKGROUND Myocardial fibrosis is a hallmark of hypertrophic cardiomyopathy (HCM) and a potential substrate for arrhythmias and heart failure. Sarcomere mutations seem to induce profibrotic changes before left ventricular hypertrophy (LVH) develops. To further evaluate these processes, we used cardiac magnetic resonance with T1 measurements on a genotyped HCM population to quantify myocardial e...

2015
Anish N Bhuva Thomas A Treibel Arthur Nasis Stefania Rosmini Amna Abdel-Gadir Heerajnarain Bulluck Charlotte Manisty James Moon

Background The calculation of the extracellular volume fraction (ECV) requires accurate quantification of myocardial and blood pool T1. Some Modified look locker inversion recovery (MOLLI) sequences provide a T1 and T1* output. T1* does not use a look locker correction, and so it is theoretically a more accurate estimation of true T1 blood T1 because fresh spins are flowing into the imaging pla...

2015
Anca R Florian Anna Ludwig Sabine Rösch Elke Schaeffeler Matthias Schwab Udo Sechtem Ali Yilmaz

Background The T1-mapping MOLLI technique has already proved to be a robust and reproducible technique for myocardial extracellular volume fraction (ECV) estimation in both healthy individuals and patients with different cardiomyopathies. Monozygotic twins share the same DNA information and frequently grow up in a similar environment. However, epigenetic as well as environmental factors may lea...

Journal: :JACC. Cardiovascular imaging 2015
Sujith Kuruvilla Rajesh Janardhanan Patrick Antkowiak Ellen C Keeley Nebiyu Adenaw Jeremy Brooks Frederick H Epstein Christopher M Kramer Michael Salerno

OBJECTIVES The goal of this study was to assess the relationship among extracellular volume (ECV), native T1, and systolic strain in hypertensive patients with left ventricular hypertrophy (HTN LVH), hypertensive patients without LVH (HTN non-LVH), and normotensive controls. BACKGROUND Diffuse myocardial fibrosis in HTN LVH patients, as reflected by increased ECV and native T1, may be an unde...

Journal: :European Journal of Echocardiography 2023

Abstract Funding Acknowledgements Type of funding sources: None. Background Myocardial fibrosis (MF) is a common endpoint in the majority pathological mechanisms affecting cardiac muscle, ultimately resulting failure. Cardiovascular magnetic resonance (CMR) with gadolinium-based contrast agent and T1 mapping technique able to deliver non-invasive quantification extracellular volume (ECV) expans...

2015
Nadya Al-Wakeel Sanaz Rastin Frédéric H Münch Felix Berger Titus Kuehne Daniel Messroghli

Background Measurement of myocardial extracellular volume fraction (ECV) with T1 mapping cardiac magnetic resonance (CMR) before and after the application of a gadolinium-based extracellular contrast agent enables the assessment of diffuse myocardial fibrosis. The equilibrium between blood and myocardium contrast concentration required for ECV measurements can be achieved with a primed contrast...

2014
Sébastien Roujol Sebastian Weingartner Murilo Foppa Kelvin Chow Keigo Kawaji Kraig V Kissinger Beth Goddu Sophie Berg Peter Kellman Warren J Manning Richard B Thompson Reza Nezafat

Background Quantitative myocardial T1 mapping provides in-vivo tissue characterization for assessment of cardiomyopathies. Pre and post-contrast T1 maps can be used to calculate the extracellular volume fraction (ECV) to detect diffuse myocardial fibrosis. Several imaging approaches have recently been proposed for measuring T1 values [1-4], but no head-to-head comparison has been reported to cr...

2018
Lu Lin Xiao Li Jun Feng Kai-ni Shen Zhuang Tian Jian Sun Yue-ying Mao Jian Cao Zheng-yu Jin Jian Li Joseph B. Selvanayagam Yi-ning Wang

BACKGROUND Cardiac impairment is associated with high morbidity and mortality in immunoglobulin light chain (AL) type amyloidosis, for which early identification and risk stratification is vital. For myocardial tissue characterization, late gadolinium enhancement (LGE) is a classic and most commonly performed cardiovascular magnetic resonance (CMR) parameter. T1 mapping with native T1 and extra...

2014
Rocio Hinojar Benjamin P Goodman Adriana Villa Darius Dabir Eduardo Arroyo Ucar Thomas Jackson Tobias Schaeffter Eike Nagel Valentina Puntmann

Background Hypertrophic cardiomyopathy (HCM) is associated with significant associated morbidity and mortality. Increased maximal left ventricular wall thickness (LVWT) has been postulated as major risk factor of sudden death; however, relatives with normal LVWT are also at risk. Genetically driven interstitial collagenesis has been proposed as a possible mechanism of diffuse myocardial fibrosi...

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