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"Cardiovascular magnetic resonance"

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https://www.readbyqxmd.com/read/29774406/reduced-global-myocardial-perfusion-reserve-in-dcm-and-hcm-patients-assessed-by-cmr-based-velocity-encoded-coronary-sinus-flow-measurements-and-first-pass-perfusion-imaging
#1
Michael Bietenbeck, Anca Florian, Zornitsa Shomanova, Claudia Meier, Ali Yilmaz
BACKGROUND: Coronary microvascular dysfunction (CMD) is an independent predictor of poor prognosis in patients suffering from dilative or hypertrophic cardiomyopathy (DCM/HCM). To assess CMD, quantitative myocardial first-pass perfusion (1P) cardiovascular magnetic resonance (CMR) can be performed. Coronary sinus flow (CSF) measurements at rest and during maximal vasodilatation are an alternative and well-validated approach for the quantification of global myocardial blood flow (MBF) in CMR...
May 17, 2018: Clinical Research in Cardiology: Official Journal of the German Cardiac Society
https://www.readbyqxmd.com/read/29774187/multimodality-imaging-for-the-quantitative-assessment-of-mitral-regurgitation
#2
REVIEW
Pei G Chew, Katrina Bounford, Sven Plein, Dominik Schlosshan, John P Greenwood
The natural history of mitral regurgitation (MR) results in significant morbidity and mortality. Innovations in non-invasive imaging have provided new insights into the pathophysiology and quantification of MR, in addition to early detection of left ventricular (LV) dysfunction and prognostic assessment in asymptomatic patients. Transthoracic (TTE) and transesophageal (TOE) echocardiography are the mainstay for diagnosis, assessment and serial surveillance. However, the advance from 2D to 3D imaging leads to improved assessment and characterization of mitral valve (MV) disease...
April 2018: Quantitative Imaging in Medicine and Surgery
https://www.readbyqxmd.com/read/29767292/short-axis-diastolic-ventricular-area-ratio-as-a-new-index-in-screening-patients-with-repaired-tetralogy-of-fallot
#3
Dala Zakaria, Sean Lang, Mallikarjuna Rettiganti, Jeffrey M Gossett, Elijah Bolin, R Thomas Collins
Right ventricular (RV) end-diastolic volume measured by cardiovascular magnetic resonance imaging (CMR) is a criterion for pulmonary valve replacement in patients with tetralogy of Fallot (TOF). We sought to determine if the ratio of echocardiographic, short-axis RV-to-left ventricular (LV) end-diastolic areas (EDA) could be used to predict RV volume on CMR. We retrospectively reviewed the echocardiograms of all patients with repaired TOF who underwent CMR at our institution from 2011 to 2015 and also had an echocardiogram within 6 months of the CMR...
May 16, 2018: Pediatric Cardiology
https://www.readbyqxmd.com/read/29766285/impact-of-left-ventricular-hypertrophy-on-myocardial-injury-in-patients-with-st-segment-elevation-myocardial-infarction
#4
Thomas Stiermaier, Janine Pöss, Charlotte Eitel, Suzanne de Waha, Georg Fuernau, Steffen Desch, Holger Thiele, Ingo Eitel
BACKGROUND: Left ventricular hypertrophy (LVH) has been suggested as a determinant of outcome in patients with ST-segment elevation myocardial infarction (STEMI). However, available data are inconclusive and the underlying mechanisms remain unclear. Therefore, the aim of this study was to evaluate the impact of LVH on myocardial injury and clinical outcome in a large multicenter STEMI population. METHODS: Cardiovascular magnetic resonance was performed in 795 patients within 10 days after STEMI to assess left ventricular (LV) mass and parameters of myocardial injury...
May 16, 2018: Clinical Research in Cardiology: Official Journal of the German Cardiac Society
https://www.readbyqxmd.com/read/29759739/aortic-valve-bypass-surgery-in-severe-aortic-valve-stenosis-insights-from-cardiac-and-brain-magnetic-resonance-imaging
#5
Cesare Mantini, Massimo Caulo, Daniele Marinelli, Piero Chiacchiaretta, Armando Tartaro, Antonio Raffaele Cotroneo, Gabriele Di Giammarco
OBJECTIVE: To investigate and describe the distribution of aortic and cerebral blood flow (CBF) in patients with severe valvular aortic stenosis (AS) before and after aortic valve bypass (AVB) surgery. METHODS: We enrolled 10 consecutive patients who underwent AVB surgery for severe AS. Cardiovascular magnetic resonance imaging (CMR) and brain magnetic resonance imaging were performed as baseline before surgery and twice after surgery. Quantitative flow measurements were obtained using 1...
April 13, 2018: Journal of Thoracic and Cardiovascular Surgery
https://www.readbyqxmd.com/read/29754182/assessment-of-aortic-stiffness-in-patients-with-ankylosing-spondylitis-using-cardiovascular-magnetic-resonance
#6
P Stefan Biesbroek, Sjoerd C Heslinga, Peter M van de Ven, Mike J L Peters, Raquel P Amier, Thelma C Konings, Christopher D Maroules, Colby Ayers, Parag H Joshi, Irene E van der Horst-Bruinsma, Vokko P van Halm, Albert C van Rossum, Michael T Nurmohamed, Robin Nijveldt
To evaluate aortic stiffness in patients with ankylosing spondylitis (AS) using cardiovascular magnetic resonance (CMR) and to assess its association with AS characteristics and left ventricular (LV) remodeling. In this prospective study, 14 consecutive AS patients were each matched to two controls without cardiovascular symptoms or known cardiovascular disease who underwent CMR imaging for the assessment of aortic arch pulse wave velocity (PWV) at 1.5 Tesla. To enhance comparability of the samples, matching was done with replacement resulting in 20 unique controls...
May 12, 2018: Clinical Rheumatology
https://www.readbyqxmd.com/read/29747849/imaging-needs-in-novel-transcatheter-tricuspid-valve-interventions
#7
REVIEW
Edgard A Prihadi, Victoria Delgado, Rebecca T Hahn, Jonathon Leipsic, James K Min, Jeroen J Bax
The advent of novel transcatheter therapies for severe tricuspid regurgitation (TR) has attracted much attention. Novel 3-dimensional imaging techniques have permitted analysis of the tricuspid valve (TV) anatomy from unparalleled views and better understanding of the underlying pathophysiology of TR. Grading TR and assessment of right ventricular function remain challenging, and although 2-dimensional echocardiography is the mainstay imaging technique to evaluate patients with severe TR the use of 3-dimensional echocardiography and cardiovascular magnetic resonance is increasing...
May 2018: JACC. Cardiovascular Imaging
https://www.readbyqxmd.com/read/29747847/quantitative-myocardial-perfusion-imaging-versus-visual-analysis-in-diagnosing-myocardial-ischemia-a-ce-marc-substudy
#8
John D Biglands, Montasir Ibraheem, Derek R Magee, Aleksandra Radjenovic, Sven Plein, John P Greenwood
OBJECTIVES: This study sought to compare the diagnostic accuracy of visual and quantitative analyses of myocardial perfusion cardiovascular magnetic resonance against a reference standard of quantitative coronary angiography. BACKGROUND: Visual analysis of perfusion cardiovascular magnetic resonance studies for assessing myocardial perfusion has been shown to have high diagnostic accuracy for coronary artery disease. However, only a few small studies have assessed the diagnostic accuracy of quantitative myocardial perfusion...
May 2018: JACC. Cardiovascular Imaging
https://www.readbyqxmd.com/read/29739967/using-all-cause-mortality-to-define-severe-rv-dilation-with-rv-lv-volume-ratio
#9
Stephan P L Altmayer, Q Joyce Han, Karima Addetia, Amit R Patel, Paul R Forfia, Yuchi Han
Right ventricular (RV) end-diastolic volume (EDV) to left ventricular (LV) EDV ratio using cardiovascular magnetic resonance imaging (CMR) is an important parameter for RV size evaluation in additional to indexed EDV. We explore the severity partition for RV dilation using mortality in a population of 62 patients with pulmonary hypertension (PH). Cine short-axis images were acquired with a 1.5 T MR scanner using a steady-state free precession sequence. The optimal cutoff to classify severe RV dilation was determined by a receiver-operating curve (ROC) analysis based on mortality...
May 8, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29736853/is-mri-equivalent-to-ct-in-the-guidance-of-tavr-a-pilot-study
#10
Agnes Mayr, Gert Klug, Sebastian J Reinstadler, Hans-Josef Feistritzer, Martin Reindl, Christian Kremser, Christof Kranewitter, Nikolaos Bonaros, Guy Friedrich, Gudrun Feuchtner, Bernhard Metzler
OBJECTIVES: To compare a comprehensive cardiovascular magnetic resonance imaging (MRI) protocol with contrast-enhanced computed tomography angiography (CTA) for guidance in transcatheter aortic valve replacement (TAVR) evaluation. METHODS AND RESULTS: Non-contrast three-dimensional (3D) 'whole heart' MRI imaging for aortic annulus sizing and measurements of coronary ostia heights, contrast-enhanced MRI angiography (MRA) for evaluation of transfemoral routes as well as aortoiliofemoral-CTA were performed in 16 patients referred for evaluation of TAVR...
May 7, 2018: European Radiology
https://www.readbyqxmd.com/read/29734491/oxygenation-sensitive-cardiovascular-magnetic-resonance-in-hypertensive-heart-disease-with-left-ventricular-myocardial-hypertrophy-and-non-left-ventricular-myocardial-hypertrophy-insight-from-altered-mechanics-and-cardiac-bold-imaging
#11
Bing-Hua Chen, Rui Wu, Dong-Aolei An, Ruo-Yang Shi, Qiu-Ying Yao, Qing Lu, Jiani Hu, Meng Jiang, James Deen, Ankush Chandra, Jian-Rong Xu, Lian-Ming Wu
BACKGROUND: BOLD (blood oxygen level dependent) MRI can detect regional condition of myocardial oxygen supply and demand by means of paramagnetic properties. PURPOSE: Noninvasive assessment of myocardial oxygenation by BOLD MRI in hypertensive patients with hypertension (HTN) left ventricular myocardial hypertrophy (LVMH) and HTN non-LVMH and its correlation with myocardial mechanics were performed. STUDY TYPE: Prospective. POPULATION: Twenty patients with HTN LVMH, 21 patients with HTN non-LVMH, and 23 normotensive controls were enrolled...
May 7, 2018: Journal of Magnetic Resonance Imaging: JMRI
https://www.readbyqxmd.com/read/29730991/feasibility-of-cardiovascular-magnetic-resonance-to-detect-oxygenation-deficits-in-patients-with-multi-vessel-coronary-artery-disease-triggered-by-breathing-maneuvers
#12
Kady Fischer, Kyohei Yamaji, Silvia Luescher, Yasushi Ueki, Bernd Jung, Hendrik von Tengg-Kobligk, Stephan Windecker, Matthias G Friedrich, Balthasar Eberle, Dominik P Guensch
BACKGROUND: Hyperventilation with a subsequent breath-hold has been successfully used as a non-pharmacological vasoactive stimulus to induce changes in myocardial oxygenation. The purpose of this pilot study was to assess if this maneuver is feasible in patients with multi-vessel coronary artery disease (CAD), and if it is effective at detecting coronary artery stenosis > 50% determined by quantitative coronary angiography (QCA). METHODS: Twenty-six patients with coronary artery stenosis (QCA > 50% diameter stenosis) underwent a contrast-free cardiovascular magnetic resonance (CMR) exam in the time interval between their primary coronary angiography and a subsequent percutaneous coronary intervention (PCI, n = 24) or coronary artery bypass (CABG, n = 2) revascularization procedure...
May 7, 2018: Journal of Cardiovascular Magnetic Resonance
https://www.readbyqxmd.com/read/29728952/myocardial-perfusion-reserve-and-global-longitudinal-strain-as-potential-markers-of-coronary-allograft-vasculopathy-in-late-stage-orthotopic-heart-transplantation
#13
Akhil Narang, John E Blair, Mita B Patel, Victor Mor-Avi, Savitri E Fedson, Nir Uriel, Roberto M Lang, Amit R Patel
Coronary allograft vasculopathy (CAV) is a major cause of mortality in late-stage orthotopic heart transplantation (OHT) patients. Recent evidence has shown that myocardial perfusion reserve (MPR) derived from vasodilator cardiovascular magnetic resonance imaging (vCMR) and global longitudinal strain (GLS) from transthoracic echocardiography (TTE) are useful to detect CAV. However, previous studies have not comprehensively addressed whether these parameters are confounded by allograft rejection, myocardial scar/fibrosis, or allograft dysfunction...
May 4, 2018: International Journal of Cardiovascular Imaging
https://www.readbyqxmd.com/read/29720202/optimization-of-late-gadolinium-enhancement-cardiovascular-magnetic-resonance-imaging-of-post-ablation-atrial-scar-a-cross-over-study
#14
Henry Chubb, Shadman Aziz, Rashed Karim, Christian Sohns, Orod Razeghi, Steven E Williams, John Whitaker, James Harrison, Amedeo Chiribiri, Tobias Schaeffter, Matthew Wright, Mark O'Neill, Reza Razavi
BACKGROUND: Cardiovascular magnetic resonance (CMR) imaging may be used to visualize post-ablation atrial scar (PAAS), and three-dimensional late gadolinium enhancement (3D LGE) is the most widely employed technique for imaging of chronic scar. Detection of PAAS provides a unique non-invasive insight into the effects of the ablation and may help guide further ablation procedures. However, there is evidence that PAAS is often not detected by CMR, implying a significant sensitivity problem, and imaging parameters vary between leading centres...
May 3, 2018: Journal of Cardiovascular Magnetic Resonance
https://www.readbyqxmd.com/read/29712696/cardiovascular-magnetic-resonance-in-acute-st-segment-elevation-myocardial-infarction-recent-advances-controversies-and-future-directions
#15
REVIEW
Heerajnarain Bulluck, Rohan Dharmakumar, Andrew E Arai, Colin Berry, Derek J Hausenloy
Although mortality after ST-segment elevation myocardial infarction (MI) is on the decline, the number of patients developing heart failure as a result of MI is on the rise. Apart from timely reperfusion by primary percutaneous coronary intervention, there is currently no established therapy for reducing MI size. Thus, new cardioprotective therapies are required to improve clinical outcomes after ST-segment-elevation MI. Cardiovascular magnetic resonance has emerged as an important imaging modality for assessing the efficacy of novel therapies for reducing MI size and preventing subsequent adverse left ventricular remodeling...
May 1, 2018: Circulation
https://www.readbyqxmd.com/read/29706134/additive-value-of-3t-cardiovascular-magnetic-resonance-coronary-angiography-for-detecting-coronary-artery-disease
#16
Lijun Zhang, Xiantao Song, Li Dong, Jianan Li, Ruiyu Dou, Zhanming Fan, Jing An, Debiao Li
BACKGROUND: The purpose of the work was to evaluate the incremental diagnostic value of free-breathing, contrast-enhanced, whole-heart, 3 T cardiovascular magnetic resonance coronary angiography (CE-MRCA) to stress/rest myocardial perfusion imaging (MPI) and late gadolinium enhancement (LGE) imaging for detecting coronary artery disease (CAD). METHODS: Fifty-one patients with suspected CAD underwent a comprehensive cardiovascular magnetic resonance (CMR) examination (CE-MRCA, MPI, and LGE)...
April 30, 2018: Journal of Cardiovascular Magnetic Resonance
https://www.readbyqxmd.com/read/29701310/longitudinal-left-ventricular-function-is-globally-depressed-within-a-week-of-stemi
#17
Ulrika Pahlm, Felicia Seemann, Henrik Engblom, Tom Gyllenhammar, Sigrun Halvorsen, Henrik Steen Hansen, David Erlinge, Dan Atar, Einar Heiberg, Håkan Arheden, Marcus Carlsson
Sixty percent of stroke volume (SV) is generated by atrioventricular plane displacement (AVPD) in a healthy left ventricle (LV). The aims were to determine the effect of ST-elevation myocardial infarction (STEMI) on AVPD and contribution of AVPD to SV and to study the relationship between AVPD and infarct size (IS) and location. Patients from CHILL-MI and MITOCARE studies with cardiovascular magnetic resonance within a week of STEMI (n = 177, 59 ± 11 years) and healthy controls (n = 20, 62 ± 11 years) were included...
April 27, 2018: Clinical Physiology and Functional Imaging
https://www.readbyqxmd.com/read/29696693/cardiovascular-magnetic-resonance-assessment-of-1st-generation-corevalve-and-2nd-generation-lotus-valves
#18
Tarique Al Musa, Akhlaque Uddin, Laura E Dobson, Peter P Swoboda, Pankaj Garg, James R J Foley, Christopher Malkin, Sven Plein, Daniel J Blackman, John P Greenwood
OBJECTIVES: We sought to compare using serial CMR, the quantity of AR and associated valve hemodynamics, following the first-generation CoreValve (Medtronic, Minneapolis, MN) and the second-generation Lotus valve (Boston Scientific, Natick, MA). BACKGROUND: Aortic regurgitation (AR) following Transcatheter Aortic Valve Replacement (TAVR) confers a worse prognosis and can be accurately quantified using cardiovascular magnetic resonance (CMR). Second generation valves have been specifically designed to reduce paravalvular AR and improve clinical outcomes...
April 25, 2018: Journal of Interventional Cardiology
https://www.readbyqxmd.com/read/29695254/atherosclerosis-t1-weighted-characterization-catch-evaluation-of-the-accuracy-for-identifying-intraplaque-hemorrhage-with-histological-validation-in-carotid-and-coronary-artery-specimens
#19
Wen Liu, Yibin Xie, Chuan Wang, Yanni Du, Christopher Nguyen, Zhenjia Wang, Zhaoyang Fan, Li Dong, Yi Liu, Xiaoming Bi, Jing An, Chengxiong Gu, Wei Yu, Debiao Li
BACKGROUND: Coronary high intensity plaques (CHIPs) detected using cardiovascular magnetic resonance (CMR) coronary atherosclerosis T1-weighted characterization with integrated anatomical reference (CATCH) have been shown to be positively associated with high-risk morphology observed on intracoronary optical coherence tomography (OCT). This study sought to validate whether CHIPs detected on CATCH indicate the presence of intraplaque hemorrhage (IPH) through ex vivo imaging of carotid and coronary plaque specimens, with histopathology as the standard reference...
April 26, 2018: Journal of Cardiovascular Magnetic Resonance
https://www.readbyqxmd.com/read/29695249/aortic-flow-patterns-and-wall-shear-stress-maps-by-4d-flow-cardiovascular-magnetic-resonance-in-the-assessment-of-aortic-dilatation-in-bicuspid-aortic-valve-disease
#20
José Fernando Rodríguez-Palomares, Lydia Dux-Santoy, Andrea Guala, Raquel Kale, Giuliana Maldonado, Gisela Teixidó-Turà, Laura Galian, Marina Huguet, Filipa Valente, Laura Gutiérrez, Teresa González-Alujas, Kevin M Johnson, Oliver Wieben, David García-Dorado, Arturo Evangelista
BACKGROUND: In patients with bicuspid valve (BAV), ascending aorta (AAo) dilatation may be caused by altered flow patterns and wall shear stress (WSS). These differences may explain different aortic dilatation morphotypes. Using 4D-flow cardiovascular magnetic resonance (CMR), we aimed to analyze differences in flow patterns and regional axial and circumferential WSS maps between BAV phenotypes and their correlation with ascending aorta dilatation morphotype. METHODS: One hundred and one BAV patients (aortic diameter ≤ 45 mm, no severe valvular disease) and 20 healthy subjects were studied by 4D-flow CMR...
April 26, 2018: Journal of Cardiovascular Magnetic Resonance
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