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https://www.readbyqxmd.com/read/28421305/the-utility-of-global-longitudinal-strain-in-the-identification-of-prior-myocardial-infarction-in-patients-with-preserved-left-ventricular-ejection-fraction
#1
Graham J Fent, Pankaj Garg, James R J Foley, Laura E Dobson, Tarique A Musa, Bara Erhayiem, John P Greenwood, Sven Plein, Peter P Swoboda
Prior myocardial infarction (MI) is associated with increased mortality and is prevalent in certain high risk patient groups. Electrocardiogram may be used in diagnosis, however, sensitivity is limited, thus non-invasive imaging techniques may improve diagnosis. We investigated whether global longitudinal strain (GLS) and longitudinal strain parameters are reduced in patients with prior MI but preserved left ventricular ejection fraction (LVEF). The study included 40 clinical patients with prior MI occurring >3 months previously (defined as subendocardial hyperenhancement on late Gadolinium enhancement imaging) with LVEF ≥ 55% and 40 controls matched for age and LVEF...
April 18, 2017: International Journal of Cardiovascular Imaging
https://www.readbyqxmd.com/read/28419023/interrelations-of-epicardial-fat-volume-left-ventricular-t1-relaxation-times-and-myocardial-strain-in-hypertensive-patients-a-cardiac-magnetic-resonance-study
#2
Rami Homsi, Daniel Kuetting, Alois Sprinkart, Nina Steinfeld, Michael Meier-Schroers, Julian Luetkens, Jennifer Nadal, Darius Dabir, Stefan Fischer, Juergen Gieseke, Hans Schild, Daniel Thomas
PURPOSE: This cardiac magnetic resonance study was performed to assess myocardial fibrosis by evaluating T1-relaxation time (T1), to measure left ventricular (LV) strain, and to determine epicardial fat volume (EFV) in hypertensive patients with no history of cardiovascular (CV) events and to relate the results to the presence of coronary atherosclerotic artery disease (CAD) in these patients. MATERIALS AND METHODS: A total of 123 subjects were examined at 1.5 T...
May 2017: Journal of Thoracic Imaging
https://www.readbyqxmd.com/read/28371774/a-novel-method-of-cone-beam-ct-projection-binning-based-on-image-registration
#3
Seonyeong Park, Siyong Kim, Byongyong Yi, Geoffrey Hugo, H Michael Gach, Yuichi Motai
Accurate sorting of beam projections is important in four-dimensional Cone Beam Computed Tomography (4D CBCT) to improve the quality of the reconstructed 4D CBCT image by removing motion-induced artifacts. We propose Image Registration-based Projection Binning (IRPB), a novel marker-less binning method for 4D CBCT projections, which combines Intensity-based Feature Point Detection (IFPD) and Trajectory Tracking using Random sample consensus (TTR). IRPB extracts breathing motion and phases by analyzing tissue feature point trajectories...
March 31, 2017: IEEE Transactions on Medical Imaging
https://www.readbyqxmd.com/read/28360259/influence-of-left-atrial-function-on-exercise-capacity-and-left-ventricular-function-in-patients-with-heart-failure-and-preserved-ejection-fraction
#4
Maximilian von Roeder, Karl-Philipp Rommel, Johannes Tammo Kowallick, Stephan Blazek, Christian Besler, Karl Fengler, Joachim Lotz, Gerd Hasenfuß, Christian Lücke, Matthias Gutberlet, Gerhard Schuler, Andreas Schuster, Philipp Lurz
BACKGROUND: Although left atrial (LA) dysfunction is common in heart failure with preserved ejection fraction (HFpEF), its functional implications beyond the reflection of left ventricular (LV) pathology are not well understood. The aim of this study was to further characterize LA function in HFpEF patients. METHODS AND RESULTS: We performed cardiac magnetic resonance myocardial feature tracking in 22 patients with HFpEF and 12 patients without HFpEF. LA reservoir strain, LA conduit strain, and LA booster pump strain were quantified...
April 2017: Circulation. Cardiovascular Imaging
https://www.readbyqxmd.com/read/28349989/distribution-pattern-of-left-ventricular-myocardial-strain-analyzed-by-a-cine-mri-based-deformation-registration-algorithm-in-healthy-chinese-volunteers
#5
Hong Liu, Dan Yang, Ke Wan, Yong Luo, Jia-Yu Sun, Tian-Jing Zhang, Wei-Hao Li, Andreas Greiser, Marie-Pierre Jolly, Qing Zhang, Yu-Cheng Chen
The cine magnetic resonance imaging based technique feature tracking-cardiac magnetic resonance (FT-CMR) is emerging as a novel, simple and robust method to evaluate myocardial strain. We investigated the distribution characteristics of left-ventricular myocardial strain using a novel cine MRI based deformation registration algorithm (DRA) in a cohort of healthy Chinese subjects. A total of 130 healthy Chinese subjects were enrolled. Three components of orthogonal strain (radial, circumferential, longitudinal) of the left ventricle were analyzed using DRA on steady-state free precession cine sequence images...
March 28, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28335982/comparison-of-displacement-encoding-with-stimulated-echoes-to-magnetic-resonance-feature-tracking-for-the-assessment-of-myocardial-strain-in-patients-with-acute-myocardial-infarction
#6
Yoshitaka Goto, Masaki Ishida, Shinichi Takase, Andreas Sigfridsson, Mio Uno, Motonori Nagata, Yasutaka Ichikawa, Kakuya Kitagawa, Hajime Sakuma
The aim of this study was to compare myocardial strain by cardiovascular magnetic resonance feature tracking (CMR-FT) to those derived from displacement encoding with stimulated echoes (DENSE) in patients with acute myocardial infarction (AMI). Twenty patients (65 pa13 years) with AMI underwent cine, DENSE, black-blood T2-weighted and late gadolinium enhancement CMR at 1.5 T. Global and segmental strain was determined by CMR-FT analysis and DENSE on matched 3 short-axis planes. Global circumferential strain by CMR-FT showed a good agreement with that by DENSE (r = 0...
February 28, 2017: American Journal of Cardiology
https://www.readbyqxmd.com/read/28283244/left-atrial-mechanics-in-patients-with-acute-stemi-and-secondary-mitral-regurgitation-a-prospective-pilot-cmr-feature-tracking-study
#7
Tomas Lapinskas, Paulius Bučius, Laura Urbonaitė, Agnieta Stabinskaitė, Živilė Valuckienė, Lina Jankauskaitė, Rimantas Benetis, Remigijus Žaliūnas
BACKGROUND AND OBJECTIVE: Left atrium (LA) is an important biomarker of adverse cardiovascular outcomes and cerebrovascular events. This study aimed to evaluate LA myocardial deformation using cardiac magnetic resonance feature tracking (CMR-FT) in patients with acute ST-segment elevation myocardial infarction (STEMI) and secondary mitral regurgitation (MR). Additionally, to assess interobserver and intraobserver variability of the technique. MATERIALS AND METHODS: Twenty patients with STEMI underwent CMR with a 1...
March 1, 2017: Medicina
https://www.readbyqxmd.com/read/28275558/myocardial-strain-and-symptom-severity-in-severe-aortic-stenosis-insights-from-cardiovascular-magnetic-resonance
#8
Tarique Al Musa, Akhlaque Uddin, Peter P Swoboda, Pankaj Garg, Timothy A Fairbairn, Laura E Dobson, Christopher D Steadman, Anvesha Singh, Bara Erhayiem, Sven Plein, Gerald P McCann, John P Greenwood
BACKGROUND: Symptomatic severe aortic stenosis (AS) is a class I indication for replacement in patients when left ventricular ejection fraction (LVEF) is preserved. However, symptom reporting is often equivocal and decision making can be challenging. We aimed to quantify myocardial deformation using cardiovascular magnetic resonance (CMR) in patients classified by symptom severity. METHODS: Forty-two patients with severe AS referred to heart valve clinic were studied using tagged CMR imaging...
February 2017: Quantitative Imaging in Medicine and Surgery
https://www.readbyqxmd.com/read/28267556/intra-and-inter-observer-reproducibility-of-global-and-regional-magnetic-resonance-feature-tracking-derived-strain-parameters-of-the-left-and-right-ventricle
#9
Björn Schmidt, Anastasia Dick, Melanie Treutlein, Petra Schiller, Alexander C Bunck, David Maintz, Bettina Baeßler
OBJECTIVES: To investigate the reproducibility of regional and global strain and strain rate (SR) parameters of both ventricles and to determine sample sizes for all investigated strain and SR parameters in order to generate a practical reference for future studies. MATERIALS AND METHODS: The study population consisted of 20 healthy individuals and 20 patients with acute myocarditis. Cine sequences in three horizontal long axis views and a stack of short axis views covering the entire left and right ventricle (LV, RV) were retrospectively analysed using a dedicated feature tracking (FT) software algorithm (TOMTEC)...
April 2017: European Journal of Radiology
https://www.readbyqxmd.com/read/28267553/left-and-right-atrial-feature-tracking-in-acute-myocarditis-a-feasibility-study
#10
Anastasia Dick, Björn Schmidt, Guido Michels, Alexander C Bunck, David Maintz, Bettina Baeßler
PURPOSE: The present study aims at evaluating the feasibility and reproducibility of cardiac magnetic resonance (CMR) feature tracking (FT) derived strain and strain rate (SR) parameters of the left and right atrium (LA, RA) in patients with acute myocarditis as well as their potential to detect diastolic dysfunction. In addition, the diagnostic value of LA and RA strain parameters in the setting of acute myocarditis is investigated. METHODS: CMR cine data of 30 patients with CMR-positive acute myocarditis were retrospectively analyzed...
April 2017: European Journal of Radiology
https://www.readbyqxmd.com/read/28263147/the-improvement-of-torsion-assessed-by-cardiovascular-magnetic-resonance-feature-tracking-after-coronary-artery-bypass-grafting-a-sensitive-index-of-cardiac-function
#11
Nan Cheng, Liuquan Cheng, Rong Wang, Lin Zhang, Changqing Gao
OBJECTIVE: The aim of this study was to quantify left ventricular torsion by newly applied cardiovascular magnetic resonance feature tracking (CMR-FT), and to evaluate the clinical value of the ventricular torsion as a sensitive indicator of cardiac function by comparison of preoperative and postoperative torsion. METHODS: A total of 54 volunteers and 36 patients with previous myocardial infarction (MI) and LV ejection fraction (EF) between 30%-50% were screened preoperatively or postoperatively by MRI...
February 28, 2017: Heart Surgery Forum
https://www.readbyqxmd.com/read/28222749/the-impact-of-trans-catheter-aortic-valve-replacement-induced-left-bundle-branch-block-on-cardiac-reverse-remodeling
#12
Laura E Dobson, Tarique A Musa, Akhlaque Uddin, Timothy A Fairbairn, Owen J Bebb, Peter P Swoboda, Philip Haaf, James Foley, Pankaj Garg, Graham J Fent, Christopher J Malkin, Daniel J Blackman, Sven Plein, John P Greenwood
BACKGROUND: Left bundle branch block (LBBB) is common following trans-catheter aortic valve replacement (TAVR) and has been linked to increased mortality, although whether this is related to less favourable cardiac reverse remodeling is unclear. The aim of the study was to investigate the impact of TAVR induced LBBB on cardiac reverse remodeling. METHODS: 48 patients undergoing TAVR for severe aortic stenosis were evaluated. 24 patients with new LBBB (LBBB-T) following TAVR were matched with 24 patients with a narrow post-procedure QRS (nQRS)...
February 22, 2017: Journal of Cardiovascular Magnetic Resonance
https://www.readbyqxmd.com/read/28215181/effect-of-cellular-and-extracellular-pathology-assessed-by-t1-mapping-on-regional-contractile-function-in-hypertrophic-cardiomyopathy
#13
Peter P Swoboda, Adam K McDiarmid, Bara Erhayiem, Graham R Law, Pankaj Garg, David A Broadbent, David P Ripley, Tarique A Musa, Laura E Dobson, James R Foley, Graham J Fent, Stephen P Page, John P Greenwood, Sven Plein
BACKGROUND: Regional contractile dysfunction is a frequent finding in hypertrophic cardiomyopathy (HCM). We aimed to investigate the contribution of different tissue characteristics in HCM to regional contractile dysfunction. METHODS: We prospectively recruited 50 patients with HCM who underwent cardiovascular magnetic resonance (CMR) studies at 3.0 T including cine imaging, T1 mapping and late gadolinium enhancement (LGE) imaging. For each segment of the American Heart Association model segment thickness, native T1, extracellular volume (ECV), presence of LGE and regional strain (by feature tracking and tissue tagging) were assessed...
February 20, 2017: Journal of Cardiovascular Magnetic Resonance
https://www.readbyqxmd.com/read/28209163/cardiovascular-magnetic-resonance-myocardial-feature-tracking-using-a-non-rigid-elastic-image-registration-algorithm-assessment-of-variability-in-a-real-life-clinical-setting
#14
Pedro Morais, Alberto Marchi, Julie A Bogaert, Tom Dresselaers, Brecht Heyde, Jan D'hooge, Jan Bogaert
BACKGROUND: Cardiovascular magnetic resonance myocardial feature tracking (CMR-FT) is a promising technique for quantification of myocardial strain from steady-state free precession (SSFP) cine images. We sought to determine the variability of CMR-FT using a non-rigid elastic registration algorithm recently available in a commercial software package (Segment, Medviso) in a real-life clinical setting. METHODS: Firstly, we studied the variability in a healthy volunteer who underwent 10 CMR studies over five consecutive days...
February 17, 2017: Journal of Cardiovascular Magnetic Resonance
https://www.readbyqxmd.com/read/28163424/cardiac-magnetic-resonance-feature-tracking-in-kawasaki-disease-convalescence
#15
Konstantinos Bratis, Pauline Hachmann, Nicholas Child, Thomas Krasemann, Tarique Hussain, Sophie Mavrogeni, Rene Botnar, Reza Razavi, Gerald Greil
OBJECTIVE: The objective of this study was to determine whether left ventricular (LV) myocardial deformation indices can detect subclinical abnormalities in Kawasaki disease convalescence. We hypothesized that subclinical myocardial abnormalities due to inflammation represent an early manifestation of the disease that persists in convalescence. BACKGROUND: Myocardial inflammation has been described as a global finding in the acute phase of Kawasaki disease. Despite normal systolic function by routine functional measurements, reduced longitudinal strain and strain rate have been detected by echocardiography in the acute phase...
January 2017: Annals of Pediatric Cardiology
https://www.readbyqxmd.com/read/28159822/beta-blocker-use-is-associated-with-impaired-left-atrial-function-in-hypertension
#16
Mayank Sardana, Amer Ahmed Syed, Zeba Hashmath, Timothy S Phan, Maheswara R Koppula, Uzma Kewan, Zoubair Ahmed, Ravikantha Chandamuri, Swapna Varakantam, Ejaz Shah, Ryan Gorz, Scott R Akers, Julio A Chirinos
BACKGROUND: Impaired left atrial (LA) mechanical function is present in hypertension and likely contributes to various complications, including atrial arrhythmias, stroke, and heart failure. Various antihypertensive drug classes exert differential effects on central hemodynamics and left ventricular function. However, little is known about their effects on LA function. METHODS AND RESULTS: We studied 212 subjects with hypertension and without heart failure or atrial fibrillation...
February 3, 2017: Journal of the American Heart Association
https://www.readbyqxmd.com/read/28153537/quantitative-assessment-of-systolic-and-diastolic-function-in-patients-with-lge-negative-systemic-amyloidosis-using-cmr
#17
Daniel L R Kuetting, Rami Homsi, Alois M Sprinkart, Julian Luetkens, Daniel K Thomas, Hans H Schild, Darius Dabir
OBJECTIVES: In clinical routine myocardial affection in amyloidosis is assessed by qualitative late gadolinium enhancement (LGE). Recent studies suggest that early cardiac involvement in amyloidosis may be overlooked by qualitative LGE assessment. The aim of this study was to assess possible early cardiac involvement in LGE negative AL patients by means of systolic and diastolic strain assessment and quantitative enhancement. METHODS: 51 individuals (17 Patients with LGE positive light-chain amyloidosis (AL) (Group A), 17 Patients with LGE negative systemic AL (Group B), and 17 healthy controls (Group C)) were investigated...
December 22, 2016: International Journal of Cardiology
https://www.readbyqxmd.com/read/28144689/the-impact-of-the-right-ventricular-outflow-tract-patch-on-right-ventricular-strain-in-tetralogy-of-fallot-a-comparison-with-valvar-pulmonary-stenosis-utilizing-cardiac-magnetic-resonance
#18
COMPARATIVE STUDY
Shafkat Anwar, Matthew A Harris, Kevin K Whitehead, Marc S Keller, Elizabeth Goldmuntz, Mark A Fogel, Laura Mercer-Rosa
A non-contractile transannular patch (TAP) in the right ventricular outflow tract (RVOT) contributes to ventricular dysfunction after tetralogy of Fallot (TOF) repair. We compared regional right ventricular (RV) strain in repaired TOF with valvar pulmonary stenosis (VPS) after balloon valvuloplasty to investigate the effects of TAP. Retrospective review of 26 cardiac magnetic resonance studies of TOF (n = 13) and VPS (n = 13) subjects matched by degree and duration of pulmonary regurgitation (PR). Feature tracking strain analysis was performed...
March 2017: Pediatric Cardiology
https://www.readbyqxmd.com/read/28103933/quantification-of-myocardial-deformation-in-children-by-cardiovascular-magnetic-resonance-feature-tracking-determination-of-reference-values-for-left-ventricular-strain-and-strain-rate
#19
Florian André, Daniëlle Robbers-Visser, Astrid Helling-Bakki, Angela Föll, Andreas Voss, Hugo A Katus, Willem A Helbing, Sebastian J Buss, Joachim G Eichhorn
BACKGROUND: The objective assessment of global and regional cardiac function in children has shown to be clinically relevant but is challenging to conduct. Cardiovascular magnetic resonance (CMR) has emerged as a valuable diagnostic modality especially in patients with cardiomyopathy or congenital heart disease. However, data on the normal cardiac deformation in children assessed by CMR is lacking at present. Thus, the aim of this study was to provide reference values for cardiac strain and strain rate in children and adolescents derived from CMR feature tracking (FT) measurements...
December 5, 2016: Journal of Cardiovascular Magnetic Resonance
https://www.readbyqxmd.com/read/28063633/evaluation-of-myocardial-strain-in-patients-with-amyloidosis-using-cardiac-magnetic-resonance-feature-tracking
#20
Tarun Pandey, Sindhura Alapati, Vibhor Wadhwa, Mohan M Edupuganti, Pooja Gurram, Shelly Lensing, Kedar Jambhekar
PURPOSE: To study the use of cardiac magnetic resonance (CMR) feature tracking technique in evaluation of myocardial amyloidosis. MATERIALS AND METHODS: CMR scans of 28 patients with biopsy proven myocardial amyloidosis and 35 controls were reviewed. Conventional short axis, vertical long axis, and 4-chamber cine steady-state free precession images from CMR scans were used to generate radial, circumferential, and longitudinal myocardial strain maps using feature tracking software...
November 10, 2016: Current Problems in Diagnostic Radiology
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