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International Journal of Cardiovascular Imaging

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https://www.readbyqxmd.com/read/28074425/high-wall-shear-stress-and-high-risk-plaque-an-emerging-concept
#1
Parham Eshtehardi, Adam J Brown, Ankit Bhargava, Charis Costopoulos, Olivia Y Hung, Michel T Corban, Hossein Hosseini, Bill D Gogas, Don P Giddens, Habib Samady
In recent years, there has been a significant effort to identify high-risk plaques in vivo prior to acute events. While number of imaging modalities have been developed to identify morphologic characteristics of high-risk plaques, prospective natural-history observational studies suggest that vulnerability is not solely dependent on plaque morphology and likely involves additional contributing mechanisms. High wall shear stress (WSS) has recently been proposed as one possible causative factor, promoting the development of high-risk plaques...
January 10, 2017: International Journal of Cardiovascular Imaging
https://www.readbyqxmd.com/read/28070743/cardiac-ct-angiography-ccta-predicts-left-atrial-appendage-occluder-device-size-and-procedure-outcome
#2
Orly Goitein, Noam Fink, Ilan Hay, Elio Di Segni, Victor Guetta, David Goitein, Yafim Brodov, Eli Konen, Michael Glikson
AIM: To investigate the role of cardiac CT angiography (CCTA) in predicting optimal left atrial appendage (LAA) occluder size and procedure outcome. METHODS AND RESULTS: Thirty-six patients underwent pre-procedural CCTA. CCTA and TEE LAA orifice diameters and perimeters were compared with the implanted device size. CCTA 3D configuration was correlated with procedure outcome. Watchman™ device (N = 18): diameters were 21 ± 4, 26 ± 5 and 25 ± 3 mm for TEE, CCTA and inserted device, respectively...
January 9, 2017: International Journal of Cardiovascular Imaging
https://www.readbyqxmd.com/read/28066866/left-ventricular-filling-pressure-by-septal-and-lateral-e-e-equally-predict-cardiovascular-events-in-the-general-population
#3
Joanna Nan Wang, Tor Biering-Sørensen, Peter Godsk Jørgensen, Jan Skov Jensen, Rasmus Mogelvang
PURPOSE: There exists no consensus on the site of E/e' measurement. This study aimed to evaluate the predictive value of septal and lateral E/e' along with the importance of their intra-individual difference. METHODS: In 1775 persons from the general population, peak early diastolic velocity (e') was obtained by color tissue Doppler at the septal and lateral mitral annular sites. The endpoint was combined of cardiovascular death or admission due to heart failure or acute myocardial infarction...
January 9, 2017: International Journal of Cardiovascular Imaging
https://www.readbyqxmd.com/read/28063138/are-biventricular-systolic-functions-impaired-in-patient-with-coronoray-slow-flow-a-prospective-study-with-three-dimensional-speckle-tracking
#4
Tuğba Kemaloğlu Öz, Mehmet Eren, Işıl Atasoy, Tayfun Gürol, Özer Soylu, Bahadır Dağdeviren
The newly developed three dimensional speckle-tracking echocardiography (3D-STE) technology provides quick and comprehensive quantitative assessment of biventricular myocardial dynamics. The impact of coronary slow flow phenomenon (CSFP) on biventricular functions has not been comprehensively evaluated using this new technology. Therefore, the aim of this study was to evaluate the effects of CSFP on biventricular systolic functions using 3D-STE. Forty patients with CSFP and otherwise normal coronary arteries (NCAs) and 40 age- and sex-matched controls with normal coronary angiograms (CAGs) were prospectively enrolled...
January 6, 2017: International Journal of Cardiovascular Imaging
https://www.readbyqxmd.com/read/28063137/caseous-calcification-of-the-mitral-annulus-not-always-a-benign-condition
#5
Jerrold Spapen, Benjamin Scott
No abstract text is available yet for this article.
January 6, 2017: International Journal of Cardiovascular Imaging
https://www.readbyqxmd.com/read/28054157/pseudoaneurysm-of-the-left-ventricular-outflow-tract-after-cardiac-surgery
#6
Marco Gennari, Andrea Annoni, Gianluca Polvani
Pseudoaneurysms of the left ventricular outflow tract (LVOT) are rare entity. We present a case of false aneurysm caused by a chronic bacterial infection after mechanical aortic valve replacement in otherwise healthy and asymptomatic young man.
January 4, 2017: International Journal of Cardiovascular Imaging
https://www.readbyqxmd.com/read/28050751/clinical-utility-of-18-f-fdg-positron-emission-tomography-computed-tomography-scan-vs-99m-tc-hmpao-white-blood-cell-single-photon-emission-computed-tomography-in-extra-cardiac-work-up-of-infective-endocarditis
#7
Trine K Lauridsen, Kasper K Iversen, Nikolaj Ihlemann, Philip Hasbak, Annika Loft, Anne K Berthelsen, Anders Dahl, Danijela Dejanovic, Elisabeth Albrecht-Beste, Jann Mortensen, Andreas Kjær, Henning Bundgaard, Niels Eske Bruun
The extra-cardiac work-up in infective endocarditis (IE) comprises a search for primary and secondary infective foci. Whether (18)FDG-PET/CT or WBC-SPECT/CT is superior in detection of clinically relevant extra-cardiac manifestations in IE is unexplored. The objectives of this study were to identify the numbers of positive findings detected by each imaging modality, to evaluate the clinical relevance of these findings and to define the reproducibility for extra-cardiac foci in patients with definite IE. Each modality was evaluated for numbers and location of positive extra-cardiac foci in patients with definite IE...
January 3, 2017: International Journal of Cardiovascular Imaging
https://www.readbyqxmd.com/read/28039591/visualizing-polymeric-bioresorbable-scaffolds-with-three-dimensional-image-reconstruction-using-contrast-enhanced-micro-computed-tomography
#8
Sheng Tu, Fudong Hu, Wei Cai, Liyan Xiao, Linlin Zhang, Hong Zheng, Qiong Jiang, Lianglong Chen
There are no previous studies showing how to visualize polymeric bioresorbable scaffolds (BRSs) by micro-computed tomography (mCT). There are no previous studies showing how to visualize polymeric bioresorbable scaffolds (BRSs) by micro-computed tomography (mCT). This study aimed to explore the feasibility of detecting polymeric BRS with 3-dimensional reconstruction of BRS images by contrast-enhanced mCT and to determine the optimal imaging settings. BRSs, made of poly-L-lactic acid (PLLA), were implanted in coronary bifurcation models...
December 30, 2016: International Journal of Cardiovascular Imaging
https://www.readbyqxmd.com/read/28025722/quantified-coronary-frequency-domain-optical-coherence-tomography-signal-analysis-for-the-evaluation-of-erythrocyte-rich-thrombus-ex-vivo-validation-study
#9
Yoshitaka Shiratori, Masato Watanabe, Nobuaki Suzuki, Toshio Fukusato, Ken Kozuma
Previous study has demonstrated that erythrocyte-rich thrombi contain more inflammatory cells and reflect high thrombus burden, leading to impaired myocardial reperfusion in myocardial infarction. The aim of this study is to investigate the utility of quantified frequency domain optical coherence tomography (FD-OCT) signal analysis in evaluating the erythrocyte-rich thrombus with ex-vivo materials. We evaluated 54 specimens of coronary artery thrombus obtained by thrombectomy catheter from 8 patients who underwent primary percutaneous coronary intervention...
December 26, 2016: International Journal of Cardiovascular Imaging
https://www.readbyqxmd.com/read/28013418/left-ventricular-reverse-remodeling-in-dilated-cardiomyopathy-maintained-subclinical-myocardial-systolic-and-diastolic-dysfunction
#10
Sandra Amorim, João Rodrigues, Manuel Campelo, Brenda Moura, Elisabete Martins, Filipe Macedo, J Silva-Cardoso, M Júlia Maciel
In idiopathic dilated cardiomyopathy (DCM), myocardial deformational parameters and their relationships remain incompletely characterized. We measured those parameters in patients with DCM, during left ventricular reverse remodeling (LVRR). Prospective study of 50 DCM patients (in sinus rhythm), with left ventricular ejection fraction (EF) <40%. LVRR was defined as an increase of ten units of EF and decrease of diastolic left ventricular diameter (LVDD) in the absence of resynchronization therapy. Performed morphological analysis, myocardial performance quantification (LV and RV Tei indexes) and LV averaged peak systolic longitudinal strain (SSR long) and circumferential strain (SSR circ)...
December 24, 2016: International Journal of Cardiovascular Imaging
https://www.readbyqxmd.com/read/28013417/left-atrial-mechanics-strongly-predict-functional-capacity-assessed-by-cardiopulmonary-exercise-testing-in-subjects-without-structural-heart-disease
#11
Luís Leite, Sofia Lázaro Mendes, Rui Baptista, Rogério Teixeira, Manuel Oliveira-Santos, Nelson Ribeiro, Rosa Coutinho, Victor Monteiro, Rui Martins, Graça Castro, Maria João Ferreira, Mariano Pego
Left atrium function is essential for cardiovascular performance and is evaluable by two-dimensional speckle-tracking echocardiography (2D-STE). Our aim was to determine how echocardiographic parameters interrelate with exercise capacity and ventilatory efficiency in subjects with no structural heart disease. Asymptomatic volunteers, in sinus rhythm and with normal biventricular size and function, were recruited from a community-based population. Individuals with moderate-to-severe valvular disease, pulmonary hypertension, and history of cardiac disease were excluded...
December 24, 2016: International Journal of Cardiovascular Imaging
https://www.readbyqxmd.com/read/28012051/assessment-of-the-left-atrial-appendage-structure-and-morphology-comparison-of-real-time-three-dimensional-transesophageal-echocardiography-and-computed-tomography
#12
Wenjuan Bai, Zhongxiu Chen, Hong Tang, Hui Wang, Wei Cheng, Li Rao
In this study, the left atrial appendage (LAA) structure and morphology were assessed using real-time three-dimensional transesophageal echocardiography (RT3D-TEE) and enhanced cardiac computed tomography (CT) scanning, and the two measurements obtained using these different techniques were compared. Two hundred nonvalvular atrial fibrillation (NVAF) patients who were prepared to undergo radiofrequency ablation were enrolled, and 62 controls were enrolled prospectively. RT3D-TEE and CT were performed, and the following parameters were measured: LAA orifice diameter, area, depth, maximum volume, and emptying velocity...
December 23, 2016: International Journal of Cardiovascular Imaging
https://www.readbyqxmd.com/read/28012050/comparative-assessment-of-plaque-media-change-on-three-modalities-of-ivus-immediately-after-implantation-of-either-everolimus-eluting-bioresorbable-vascular-scaffold-or-everolimus-eluting-metallic-stent-in-absorb-ii-study
#13
Yaping Zeng, Rafael Cavalcante, Erhan Tenekecioglu, Pannipa Suwannasom, Yohei Sotomi, Carlos Collet, Mahammad Abdelghani, Hans Jonker, Franck Digne, Dieter Horstkotte, Manfred Zehender, Ciro Indolfi, Francesco Saia, Rosario Fiorilli, Bernard Chevalier, Leonardo Bolognese, Javier Goicolea, Shaoping Nie, Yoshinobu Onuma, Patrick W Serruys
The purpose of the study to assess the comparability of immediate changes in plaque/media volume (PV) on three modalities of intravascular ultrasound (IVUS) after implantation of either bioresorbable vascular scaffold (BVS) or everolimus-eluting metallic stent (EES) in Absorb II Study. The two devices have different device volume and ultrasound backscattering that may interfere with the "plaque/media" assessed by three modalities on IVUS: grayscale, backscattering of radiofrequency and brightness function. In a multicenter randomized controlled trial, 501 patients with stable or unstable angina underwent documentary IVUS pre- and post- implantation...
December 23, 2016: International Journal of Cardiovascular Imaging
https://www.readbyqxmd.com/read/28005218/impact-of-surgical-pulmonary-valve-replacement-on-ventricular-mechanics-in-children-with-repaired-tetralogy-of-fallot
#14
D Yim, L Mertens, C T Morgan, M K Friedberg, L Grosse-Wortmann, A Dragulescu
Impaired ventricular myocardial mechanics are observed in patients with repaired tetralogy of Fallot (rTOF). Effects of pulmonary valve replacement (PVR) on ventricular remodeling are controversial. The objective was to assess the impact of surgical PVR on ventricular mechanics in pediatric patients after rTOF. Speckle-tracking analysis was performed in 50 rTOF children, aged 12.6 ± 3.3 years, pre-operatively and 14.5 ± 2.2 months post-PVR. Early post-operative studies 2.2 ± 0.6 months post-PVR were performed in 28 patients...
December 22, 2016: International Journal of Cardiovascular Imaging
https://www.readbyqxmd.com/read/28004210/exuberant-mitral-annular-calcification
#15
Melissa A Lyle, David F Snipelisky, Niti R Aggarwal, Fletcher A Miller, Nandan S Anavekar
Mitral annular calcification (MAC) is a chronic, progressive process characterized by calcium deposition on the mitral valve annulus. There is no current grading system to relay the severity of MAC. The primary purpose of this study was to investigate the extreme end of the severity spectrum in order to describe "exuberant mitral annular calcification", and a retrospective chart review of all patients with exuberant mitral annulus calcification evaluated at Mayo Clinic Rochester between January 1996 and December 2014 was performed...
December 22, 2016: International Journal of Cardiovascular Imaging
https://www.readbyqxmd.com/read/28004209/sealing-of-calcified-plaques-after-bioresorbable-scaffold-implantations-a-five-year-follow-up
#16
Erhan Tenekecioglu, Christos V Bourantas, Yoshinobu Onuma, Patrick W Serruys
No abstract text is available yet for this article.
December 21, 2016: International Journal of Cardiovascular Imaging
https://www.readbyqxmd.com/read/28000002/stress-perfusion-magnetic-resonance-imaging-to-detect-coronary-artery-lesions-in-children
#17
Chodchanok Vijarnsorn, Michelle Noga, Daryl Schantz, Dion Pepelassis, Edythe B Tham
BACKGROUND: Stress perfusion cardiovascular magnetic resonance (CMR) is used widely in adult ischemic heart disease, but data in children is limited. We sought to evaluate feasibility, accuracy and prognostic value of stress CMR in children with suspected coronary artery disease (CAD). METHODS: Stress CMR was reviewed from two pediatric centers over 5 years using a standard pharmacologic protocol. Wall motion abnormalities, perfusion deficits and late enhancement were correlated with coronary angiogram (CAG) when available, and clinical status at 1 year follow-up for major adverse cardiovascular events (MACE; coronary revascularization, non-fatal myocardial infarction and death due to CAD) was recorded...
December 20, 2016: International Journal of Cardiovascular Imaging
https://www.readbyqxmd.com/read/27995343/pre-procedural-renal-resistive-index-accurately-predicts-contrast-induced-acute-kidney-injury-in-patients-with-preserved-renal-function-submitted-to-coronary-angiography
#18
Maciej T Wybraniec, Maria Bożentowicz-Wikarek, Jerzy Chudek, Katarzyna Mizia-Stec
The study aimed to evaluate the clinical utility of ultrasonographic intra-renal blood flow parameters, together with the wide range of different risk factors, for the prediction of contrast-induced acute kidney injury (CI-AKI) in patients with preserved renal function, referred for coronary angiography or percutaneous coronary interventions (CA/PCI). This prospective study covered 95 consecutive patients (69.5% men; median age 65 years) subject to elective or urgent CA/PCI. Data regarding 128 peri-procedural variables were collected...
December 19, 2016: International Journal of Cardiovascular Imaging
https://www.readbyqxmd.com/read/27987040/lipid-lowering-therapy-stabilizes-the-complexity-of-non-culprit-plaques-in-human-coronary-artery-a-quantitative-assessment-using-oct-bright-spot-algorithm
#19
Yoshiyasu Minami, Taylor Hoyt, Jennifer E Phipps, Thomas E Milner, Lei Xing, Hang Lee, Bo Yu, Marc D Feldman, Ik-Kyung Jang
To quantitatively evaluate the change of plaque complexity with cholesterol lowering therapy. A total of 44 non-culprit plaques from 30 patients who had serial image acquisition at baseline, 6-months, and 12-months by both optical coherence tomography (OCT) and intravascular ultrasound (IVUS) were included. Patients were treated with atorvastatin 60 mg (AT60, n = 16) or 20 mg (AT20, n = 14). We applied an OCT bright spot algorithm, which identifies a variety of plaque components including macrophages...
December 16, 2016: International Journal of Cardiovascular Imaging
https://www.readbyqxmd.com/read/27943062/longitudinal-function-and-ventricular-dyssynchrony-are-restored-in-children-with-pulmonary-stenosis-after-percutaneous-balloon-pulmonary-valvuloplasty
#20
Ragab A Mahfouz, Tamer M Moustafa, Mohammad Gouda, Marwa Gad
The aim of this study was to evaluate the impact of balloon pulmonary valvuloplasty on longitudinal ventricular dysfunction and cardiac dyssynchrony in children with congenital moderately severe pulmonary stenosis (PS). Forty-eight children with congenital moderately severe valvular pulmonary stenosis and 36 age-matched normal children were included. Successful percutaneous balloon pulmonary valvuloplasty was performed for children with PS. Longitudinal Cardiac function and myocardial synchrony was assessed by echocardiography with tissue Doppler imaging (TDI)...
December 10, 2016: International Journal of Cardiovascular Imaging
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