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Cardiac MR

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https://www.readbyqxmd.com/read/28228942/effects-of-renal-denervation-on-vascular-remodelling-in-patients-with-heart-failure-and-preserved-ejection-fraction-a-randomised-control-trial
#1
Hitesh C Patel, Carl Hayward, Jennifer Keegan, Peter D Gatehouse, Ronak Rajani, Rajdeep S Khattar, Raad H Mohiaddin, Stuart D Rosen, Alexander R Lyon, Carlo di Mario
OBJECTIVE: To assess the effect of renal denervation (RDT) on micro- and macro-vascular function in patients with heart failure with preserved ejection fraction (HFpEF). DESIGN: A prospective, randomised, open-controlled trial with blinded end-point analysis. SETTING: A single-centre London teaching hospital. PARTICIPANTS: Twenty-five patients with HFpEF who were recruited into the RDT-PEF trial. MAIN OUTCOME MEASURES: Macro-vascular: 24-h ambulatory pulse pressure, aorta distensibilty (from cardiac magnetic resonance imaging (CMR), aorta pulse wave velocity (CMR), augmentation index (peripheral tonometry) and renal artery blood flow indices (renal MR)...
January 2017: JRSM Cardiovascular Disease
https://www.readbyqxmd.com/read/28227423/dynamic-mapping-of-ventricular-function-from-cardiovascular-magnetic-resonance-imaging
#2
Maria Panayiotou, Peter Mountney, Alexander Brost, Daniel Toth, Tom Jackson, Jonathan M Behar, Christopher A Rinaldi, R James Housden, Kawal S Rhode, Maria Panayiotou, Peter Mountney, Alexander Brost, Daniel Toth, Tom Jackson, Jonathan M Behar, Christopher A Rinaldi, R James Housden, Kawal S Rhode, Alexander Brost, Tom Jackson, Maria Panayiotou, Christopher A Rinaldi, Jonathan M Behar, R James Housden, Kawal S Rhode, Daniel Toth, Peter Mountney
Heart failure is associated with substantial mortality and morbidity and remains the most common diagnosis in older patients. Based on experimental electrophysiologic studies, cardiac resynchronization therapy (CRT) for heart failure results in a maximum resynchronization effect when applied to the most delayed left ventricular (LV) site. Current clinical practice is to identify the optimal site using separate visualisation of scar and activation information. These must be mentally mapped into 3D, which is challenging and time-consuming for the electrophysiologist...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28220266/interpretation-of-cardiac-wall-motion-from-cine-mri-combined-with-parametric-imaging-based-on-the-hilbert-transform
#3
Narjes Benameur, Enrico Gianluca Caiani, Younes Arous, Nejmeddine Ben Abdallah, Tarek Kraiem
OBJECT: The aim of this study was to test and validate the clinical impact of parametric amplitude images obtained using the Hilbert transform on the regional interpretation of cardiac wall motion abnormalities from cine-MR images by non-expert radiologists compared with expert consensus. MATERIALS AND METHODS: Cine-MRI short-axis images obtained in 20 patients (10 with myocardial infarction, 5 with myocarditis and 5 with normal function) were processed to compute a parametric amplitude image for each using the Hilbert transform...
February 20, 2017: Magma
https://www.readbyqxmd.com/read/28218885/faster-diffusion-weighted-mr-imaging-of-cardiac-microstructure
#4
Leon Axel
No abstract text is available yet for this article.
March 2017: Radiology
https://www.readbyqxmd.com/read/28218210/optimal-timing-of-surgical-revascularization-for-myocardial-infarction-and-left-ventricular-dysfunction
#5
Rong Wang, Nan Cheng, Cang-Song Xiao, Yang Wu, Xiao-Yong Sai, Zhi-Yun Gong, Yao Wang, Chang-Qing Gao
BACKGROUND: The optimal timing of surgical revascularization for patients presenting with ST-segment elevation myocardial infarction (STEMI) and impaired left ventricular function is not well established. This study aimed to examine the timing of surgical revascularization after STEMI in patients with ischemic heart disease and left ventricular dysfunction (LVD) by comparing early and late results. METHODS: From January 2003 to December 2013, there were 2276 patients undergoing isolated coronary artery bypass grafting (CABG) in our institution...
2017: Chinese Medical Journal
https://www.readbyqxmd.com/read/28217313/ghrelin-and-hormonal-markers-under-exercise-training-in-patients-with-heart-failure-with-preserved-ejection-fraction-results-from-the-ex-dhf-pilot-study
#6
Tobias Daniel Trippel, Volker Holzendorf, Martin Halle, Götz Gelbrich, Kathleen Nolte, Andre Duvinage, Silja Schwarz, Tinka Rutscher, Julian Wiora, Rolf Wachter, Christoph Herrmann-Lingen, Hans-Dirk Duengen, Gerd Hasenfuß, Burkert Pieske, Frank Edelmann
BACKGROUND: Over 50% of patients with symptomatic heart failure (HF) experience HF with preserved ejection fraction (HFpEF). Exercise training (ET) is effective in improving cardiorespiratory fitness and dimensions of quality of life in patients with HFpEF. A systemic pro-inflammatory state induced by comorbidities as the cause of myocardial structural and functional alterations has been proposed in HFpEF. ET modifies myocardial structure and has been related to inflammatory state. We investigated Ghrelin, related adipokines, markers of inflammation, and neuro-hormonal activation in patients undergoing a structured ET vs...
February 2017: ESC Heart Failure
https://www.readbyqxmd.com/read/28217310/the-impact-of-gender-mismatching-on-early-and-late-outcomes-following-heart-transplantation
#7
Yael Peled, Jacob Lavee, Michael Arad, Yedida Shemesh, Moshe Katz, Yigal Kassif, Elad Asher, Dan Elian, Yedael Har-Zahav, Ilan Goldenberg, Dov Freimark
AIMS: The role of donor/recipient gender matching on the long-term rejection process and clinical outcomes following heart transplantation (HT) outcomes is still controversial. We aim to investigate the impact of gender matching on early and long-term outcome HT. METHODS AND RESULTS: The study population comprised 166 patients who underwent HT between 1991 and 2013 and were prospectively followed up in a tertiary referral centre. Early and late outcomes were assessed by the type of donor-recipient gender match (primary analysis: female donor-male recipient [FD-MR, n = 36] vs...
February 2017: ESC Heart Failure
https://www.readbyqxmd.com/read/28212715/novel-biomarkers-of-heart-failure
#8
A Savic-Radojevic, M Pljesa-Ercegovac, M Matic, D Simic, S Radovanovic, T Simic
Although substantial improvements have been made in majority of cardiac disorders, heart failure (HF) remains a major health problem, with both increasing incidence and prevalence over the past decades. For that reason, the number of potential biomarkers that could contribute to diagnosis and treatment of HF patients is, almost exponentially, increasing over the recent years. The biomarkers that are, at the moment, more or less ready for use in everyday clinical practice, reflect different pathophysiological processes present in HF...
2017: Advances in Clinical Chemistry
https://www.readbyqxmd.com/read/28212053/transthoracic-echocardiography-pitfalls-and-limitations-as-delineated-at-cardiac-ct-and-mr-imaging
#9
Sachin B Malik, Natalie Chen, Rex A Parker, Joe Y Hsu
Transthoracic echocardiography ( TTE transthoracic echocardiography ) is a critical tool in the field of clinical cardiology. It often serves as one of the first-line imaging modalities in the evaluation of cardiac disease owing to its low cost, portability, widespread availability, lack of ionizing radiation, and ability to evaluate both anatomy and function of the heart. Consequently, a large majority of patients undergoing a cardiac computed tomography (CT) or magnetic resonance (MR) imaging examination will have a TTE transthoracic echocardiography available for review...
February 17, 2017: Radiographics: a Review Publication of the Radiological Society of North America, Inc
https://www.readbyqxmd.com/read/28205347/robust-universal-nonrigid-motion-correction-framework-for-first-pass-cardiac-mr-perfusion-imaging
#10
Mitchel Benovoy, Matthew Jacobs, Farida Cheriet, Nagib Dahdah, Andrew E Arai, Li-Yueh Hsu
PURPOSE: To present and assess an automatic nonrigid image registration framework that compensates motion in cardiac magnetic resonance imaging (MRI) perfusion series and auxiliary images acquired under a wide range of conditions to facilitate myocardial perfusion quantification. MATERIALS AND METHODS: Our framework combines discrete feature matching for large displacement estimation with a dense variational optical flow formulation in a multithreaded architecture...
February 15, 2017: Journal of Magnetic Resonance Imaging: JMRI
https://www.readbyqxmd.com/read/28202854/three-dimensional-cardiac-mr-imaging-related-techniques-and-clinical-applications
#11
Yasuo Amano, Fumi Yanagisawa, Masaki Tachi, Kuniya Asai, Yasuyuki Suzuki, Hidenobu Hashimoto, Kiyohisa Ishihara, Shinichiro Kumita
Three-dimensional (3D) cardiac magnetic resonance (MR) imaging has several advantages, including the easy coverage of the entire heart without misregistration, reduction of breath-holding times, and availability for postprocessing reconstruction. These advantages are associated with some techniques such as breath-hold or navigator gating and parallel imaging. However, the image quality of 3D cardiac MR images is compromised by the use of a shorter repetition time and parallel imaging. Thus, a steady-state free precession sequence, contrast agent administration, and presaturation pulses are used to maintain the image quality...
February 16, 2017: Magnetic Resonance in Medical Sciences: MRMS
https://www.readbyqxmd.com/read/28201839/mr-imaging-in-patients-with-cardiac-pacemakers-and-implantable-cardioverter-defibrillators
#12
Torsten Sommer, Wolfgang Bauer, Katharina Fischbach, Christof Kolb, Roger Luechinger, Uwe Wiegand, Joachim Lotz, Ingo Eitel, Matthias Gutberlet, Holger Thiele, Hans H Schild, Malte Kelm, Harald H Quick, Jeanette Schulz-Menger, Jörg Barkhausen, Dietmar Bänsch
This joint consensus paper of the German Roentgen Society and the German Cardiac Society provides physical and electrophysiological background information and specific recommendations for the procedural management of patients with cardiac pacemakers (PM) and implantable cardioverter defibrillators (ICD) undergoing magnetic resonance (MR) imaging. The paper outlines the responsibilities of radiologists and cardiologists regarding patient education, indications, and monitoring with modification of MR sequences and PM/ICD reprogramming strategies being discussed in particular...
February 15, 2017: RöFo: Fortschritte Auf Dem Gebiete der Röntgenstrahlen und der Nuklearmedizin
https://www.readbyqxmd.com/read/28188427/the-prognostic-value-of-right-ventricular-long-axis-strain-in-non-ischaemic-dilated-cardiomyopathies-using-standard-cardiac-magnetic-resonance-imaging
#13
Nisha Arenja, Johannes H Riffel, Manuel Halder, Charly N Djiokou, Thomas Fritz, Florian Andre, Fabian Aus dem Siepen, Thomas Zelniker, Benjamin Meder, Elham Kayvanpour, Grigorios Korosoglou, Hugo A Katus, Sebastian J Buss
OBJECTIVE: To investigate the association of right ventricular long axis strain (RV-LAS), a parameter of longitudinal function, with outcome in patients with non-ischaemic dilated cardiomyopathy (NIDCM). METHODS: In 441 patients with NIDCM, RV-LAS was analysed retrospectively by measuring the length between the epicardial border of the left ventricular apex and the middle of a line connecting the origins of the tricuspidal valve leaflets in end-diastole and end-systole on non-contrast standard cine sequences...
February 10, 2017: European Radiology
https://www.readbyqxmd.com/read/28185701/immediate-increase-of-cardiac-output-after-percutaneous-mitral-valve-repair-pmvr-determined-by-echocardiographic-and-invasive-parameters-patzelt-increase-of-cardiac-output-after-pmvr
#14
Johannes Patzelt, Yingying Zhang, Harry Magunia, Rezo Jorbenadze, Michal Droppa, Miriam Ulrich, Shanglang Cai, Henning Lausberg, Tobias Walker, Tobias Wengenmayer, Peter Rosenberger, Juergen Schreieck, Peter Seizer, Meinrad Gawaz, Harald F Langer
BACKGROUND: Successful percutaneous mitral valve repair (PMVR) in patients with severe mitral regurgitation (MR) causes changes in hemodynamics. Echocardiographic calculation of cardiac output (CO) has not been evaluated in the setting of PMVR, so far. Here we evaluated hemodynamics before and after PMVR with the MitraClip system using pulmonary artery catheterization, transthoracic (TTE) and transesophageal (TEE) echocardiography. METHODS: 101 patients with severe MR not eligible for conventional surgery underwent PMVR...
January 26, 2017: International Journal of Cardiology
https://www.readbyqxmd.com/read/28185680/recurrent-pericarditis
#15
M Imazio, A Battaglia, L Gaido, F Gaita
Recurrent pericarditis is the most troublesome complication of pericarditis occurring in 15 to 30% of cases. The pathogenesis is often presumed to be immune-mediated although a specific rheumatologic diagnosis is commonly difficult to find. The clinical diagnosis is based on recurrent pericarditis chest pain and additional objective evidence of disease activity (e.g. pericardial rub, ECG changes, pericardial effusion, elevation of markers of inflammation, and/or imaging evidence of pericardial inflammation by CT or cardiac MR)...
February 6, 2017: La Revue de Médecine Interne
https://www.readbyqxmd.com/read/28183991/cardiac-and-respiratory-motion-correction-for-simultaneous-cardiac-pet-mr
#16
Christoph Kolbitsch, Mark A Ahlman, Cynthia Davies-Venn, Robert Evers, Michael Hansen, Devis Peressutti, Paul Marsden, Peter Kellman, David A Bluemke, Tobias Schaeffter
Cardiac Positron Emission Tomography (PET) is a versatile imaging technique providing important diagnostic information about ischemic heart diseases. Respiratory and cardiac motion of the heart can strongly impair image quality and therefore diagnostic accuracy of cardiac PET scans. The aim of this study is to investigate a new cardiac PET-Magnetic Resonance (MR) approach providing respiratory and cardiac motion-compensated MR and PET images in less than five minutes. Methods: Free-breathing 3D MR data was acquired and retrospectively binned into multiple respiratory and cardiac motion states...
February 9, 2017: Journal of Nuclear Medicine: Official Publication, Society of Nuclear Medicine
https://www.readbyqxmd.com/read/28167746/randomised-controlled-trial-examining-the-effect-of-an-outpatient-exercise-training-programme-on-haemodynamics-and-cardiac-mr-parameters-of-right-ventricular-function-in-patients-with-pulmonary-arterial-hypertension-the-expah-study-protocol
#17
Karen S W Chia, Steven G Faux, Peter K K Wong, Cameron Holloway, Hassan Assareh, Craig S McLachlan, Eugene Kotlyar
INTRODUCTION: Pulmonary hypertension (PH) is a potentially life-threatening condition characterised by elevated pulmonary artery pressure. Early stage PH patients are often asymptomatic. Disease progression is associated with impairment of right ventricular function and progressive dyspnoea. Current guidelines recommend exercise training (grade IIa, level B). However, many questions remain regarding the mechanisms of improvement, intensity of supervision and optimal frequency, duration and intensity of exercise...
February 6, 2017: BMJ Open
https://www.readbyqxmd.com/read/28153348/cardiac-magnetic-resonance-imaging-versus-transthoracic-echocardiography-for-prediction-of-outcomes-in-chronic-aortic-or-mitral-regurgitation
#18
Andrew W Harris, Eric V Krieger, Minkyu Kim, Peter J Cawley, David S Owens, Christian Hamilton-Craig, Jeffrey Maki, Catherine M Otto
In subjects with aortic regurgitation (AR) or mitral regurgitation (MR), transthoracic echocardiography (TTE) is recommended for surveillance. Few prospective studies have directly compared the ability of TTE and cardiac magnetic resonance (CMR) to predict clinical outcomes in AR and MR. We hypothesized that, given its higher reproducibility, CMR would predict the need for valve surgery or heart failure (HF) hospitalization better than TTE. Quantitative TTE and CMR were performed on the same day for 51 subjects: 29 with chronic AR and 22 with chronic, primary MR for quantification of valve regurgitation...
January 5, 2017: American Journal of Cardiology
https://www.readbyqxmd.com/read/28152238/assessment-of-segmental-myocardial-blood-flow-and-myocardial-perfusion-reserve-by-adenosine-stress-myocardial-arterial-spin-labeling-perfusion-imaging
#19
Andrew J Yoon, Hung Phi Do, Steven Cen, Michael W Fong, Farhood Saremi, Mark L Barr, Krishna S Nayak
PURPOSE: To determine the feasibility of measuring increases in myocardial blood flow (MBF) and myocardial perfusion reserve (MPR) on a per-segment basis using arterial spin labeled (ASL) magnetic resonance imaging (MRI) with adenosine vasodilator stress in normal human myocardium. MATERIALS AND METHODS: Myocardial ASL scans at rest and during adenosine infusion were incorporated into a routine 3T MR adenosine-induced vasodilator stress protocol and were performed in 10 healthy human volunteers...
February 2, 2017: Journal of Magnetic Resonance Imaging: JMRI
https://www.readbyqxmd.com/read/28152237/native-t1-value-in-the-remote-myocardium-is-independently-associated-with-left-ventricular-dysfunction-in-patients-with-prior-myocardial-infarction
#20
Shiro Nakamori, Javid Alakbarli, Steven Bellm, Shweta R Motiwala, Gifty Addae, Warren J Manning, Reza Nezafat
PURPOSE: To compare remote myocardium native T1 in patients with chronic myocardial infarction (MI) and controls without MI and to elucidate the relationship of infarct size and native T1 in the remote myocardium for the prediction of left ventricular (LV) systolic dysfunction after MI. MATERIALS AND METHODS: A total of 41 chronic MI (18 anterior MI) patients and 15 age-matched volunteers with normal LV systolic function and no history of MI underwent cardiac magnetic resonance imaging (MRI) at 1...
February 2, 2017: Journal of Magnetic Resonance Imaging: JMRI
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