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Cardiac MR

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https://www.readbyqxmd.com/read/29342431/comparison-of-access-type-on-perioperative-outcomes-after-endovascular-aortic-aneurysm-repair
#1
Jeffrey J Siracuse, Alik Farber, Jeffrey A Kalish, Douglas W Jones, Denis Rybin, Gheorghe Doros, Salvatore T Scali, Marc L Schermerhorn
OBJECTIVE: Endovascular aneurysm repair (EVAR) can be performed through percutaneous or surgical access. Our goal was to assess the difference in perioperative outcomes based on access type in a real-world setting. METHODS: The Vascular Quality Initiative (VQI) database was queried for EVAR. Univariable analysis and multivariable analysis were used to determine the independent effect of access type. RESULTS: There were 8340 (64%) and 4747 (36%) EVAR procedures performed through percutaneous and surgical access (3395 [72%] transverse and 1352 [28%] vertical incisions)...
January 13, 2018: Journal of Vascular Surgery
https://www.readbyqxmd.com/read/29341014/cardiac-mri-in-small-animals
#2
Min-Chi Ku, Till Huelnhagen, Thoralf Niendorf, Andreas Pohlmann
Cardiac magnetic resonance (MR) imaging of mice is a valuable tool for the precise in vivo diagnosis and prognosis of heart defects. This detailed protocol describes the method of cardiac MR imaging in mice step by step. A series of MR images captures the contractile function of the mouse heart and post-processing of the image data yields morphometric parameters (myocardial mass, myocardial wall thickness, ventricular end-systolic and end-diastolic volume) as well as functional parameters (stroke volume and ejection fraction)...
2018: Methods in Molecular Biology
https://www.readbyqxmd.com/read/29327374/dynamic-coronary-mr-angiography-in-a-pig-model-with-hyperpolarized-water
#3
Kasper Wigh Lipsø, Esben Søvsø Szocska Hansen, Rasmus Stilling Tougaard, Christoffer Laustsen, Jan Henrik Ardenkjaer-Larsen
PURPOSE: To investigate dynamic coronary MR angiography using hyperpolarized water as a positive contrast agent. Hyperpolarization can increase the signal by several orders of magnitude, and has recently been translated to human cardiac application. The aim was to achieve large 1 H signal enhancement to allow high-resolution imaging of the coronary arteries. METHODS: Protons in D2 O were hyperpolarized by dissolution dynamic nuclear polarization. A total of 18 mL of hyperpolarized water was injected into the coronary arteries of healthy pigs (N = 9; 3 injections in 3 animals)...
January 12, 2018: Magnetic Resonance in Medicine: Official Journal of the Society of Magnetic Resonance in Medicine
https://www.readbyqxmd.com/read/29320324/spectrum-of-coronary-artery-aneurysms-from-the-radiologic-pathology-archives
#4
Jean Jeudy, Charles S White, Seth J Kligerman, Jonathan L Killam, Allen P Burke, Jacob W Sechrist, Amar B Shah, Rydhwana Hossain, Aletta Ann Frazier
Advances in medical diagnosis reveal that coronary artery aneurysms (CAAs) may develop in several clinical scenarios and manifest variable symptoms, imaging appearances, and outcomes. Aneurysms are pathologically classified into three groups: atherosclerotic, inflammatory, and noninflammatory. The last category is associated with congenital, inherited, and connective tissue disorders. Overlap exists among the groups, because secondary atherosclerotic change may be present in an aneurysm of any cause. Atherosclerosis is the most common cause of CAAs in adults, and inflammation is considered the underlying mechanism...
January 2018: Radiographics: a Review Publication of the Radiological Society of North America, Inc
https://www.readbyqxmd.com/read/29319785/diagnostic-accuracy-and-prognostic-value-of-simultaneous-hybrid-18f-fluorodeoxyglucose-positron-emission-tomography-magnetic-resonance-imaging-in-cardiac-sarcoidosis
#5
Eleanor C Wicks, Leon J Menezes, Anna Barnes, Saidi A Mohiddin, Neha Sekhri, Joanna C Porter, Helen L Booth, Emily Garrett, Riyaz S Patel, Menelaos Pavlou, Ashley M Groves, Perry M Elliott
Aims: Cardiac death is the leading cause of mortality in patients with sarcoidosis, yet cardiac involvement often remains undetected. Cardiovascular magnetic resonance imaging (CMR) and 18F-fluorodeoxyglucose (FDG)-positron emission tomography (PET) have been used to diagnose cardiac sarcoidosis (CS) yet never simultaneously in a cohort. This study sought to assess the diagnostic and prognostic utility of simultaneous hybrid cardiac PET/MR. Methods and results: Fifty-one consecutive patients with suspected CS (age 50 ± 13 years, 31 males) underwent simultaneous PET/MR following a high-fat/low-carbohydrate diet and 12-h fast...
January 8, 2018: European Heart Journal Cardiovascular Imaging
https://www.readbyqxmd.com/read/29311562/imaging-4d-morphology-and-dynamics-of-mitral-annulus-in-humans-using-cardiac-cine-mr-feature-tracking
#6
Shuang Leng, Shuo Zhang, Meng Jiang, Xiaodan Zhao, Rui Wu, John Allen, Ben He, Ru San Tan, Liang Zhong
Feature tracking in cine cardiac magnetic resonance (CMR) is a quantitative technique to assess heart structure and function. We investigated 4-dimensional (4D) dynamics and morphology of the mitral annulus (MA) using a novel tracking system based on radially rotational long-axis cine CMR series. A total of 30 normal controls and patients with mitral regurgitation were enrolled. The spatiotemporal changes of the MA were characterized by an in-house developed program. Dynamic and morphological parameters extracted from all 18 radial slices were used as references and were compared with those from subsequently generated sub-datasets with different degrees of sparsity...
January 8, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29309426/gadolinium-enhanced-cardiac-mr-exams-of-human-subjects-are-associated-with-significant-increases-in-the-dna-repair-marker-53bp1-but-not-the-damage-marker-%C3%AE-h2ax
#7
Jennifer S McDonald, Robert J McDonald, Jacob B Ekins, Anthony S Tin, Sylvain Costes, Tamara M Hudson, Dana J Schroeder, Kevin Kallmes, Scott H Kaufmann, Philip M Young, Aiming Lu, Ramanathan Kadirvel, David F Kallmes
Magnetic resonance imaging is considered low risk, yet recent studies have raised a concern of potential damage to DNA in peripheral blood leukocytes. This prospective Institutional Review Board-approved study examined potential double-strand DNA damage by analyzing changes in the DNA damage and repair markers γH2AX and 53BP1 in patients who underwent a 1.5 T gadolinium-enhanced cardiac magnetic resonance (MR) exam. Sixty patients were enrolled (median age 55 years, 39 males). Patients with history of malignancy or who were receiving chemotherapy, radiation therapy, or steroids were excluded...
2018: PloS One
https://www.readbyqxmd.com/read/29301453/evaluation-and-selection-of-anatomic-sites-for-magnetic-resonance-imaging-guided-mild-hyperthermia-therapy-a-healthy-volunteer-study
#8
Satya V V N Kothapalli, Michael B Altman, Lifei Zhu, Ari Partanen, Galen Cheng, H Michael Gach, William Straube, Imran Zoberi, Dennis E Hallahan, Hong Chen
PURPOSE: Since mild hyperthermia therapy (MHT) requires maintaining the temperature within a narrow window (e.g. 40-43 °C) for an extended duration (up to 1 h), accurate and precise temperature measurements are essential for ensuring safe and effective treatment. This study evaluated the precision and accuracy of MR thermometry in healthy volunteers at different anatomical sites for long scan times. METHODS: A proton resonance frequency shift method was used for MR thermometry...
January 4, 2018: International Journal of Hyperthermia
https://www.readbyqxmd.com/read/29300869/educational-needs-and-application-of-guidelines-in-the-management-of-patients-with-mitral-regurgitation-a-european-mixed-methods-study
#9
Bernard Iung, Victoria Delgado, Patrice Lazure, Suzanne Murray, Per Anton Sirnes, Raphael Rosenhek, Susanna Price, Marco Metra, Céline Carrera, Michele De Bonis, Michael Haude, Gerhard Hindricks, Jeroen Bax, Alec Vahanian
Aims: To assess the knowledge and application of European Society of Cardiology (ESC) Guidelines in the management of mitral regurgitation (MR). Methods and results: A mixed-methods educational needs assessment was performed. Following a qualitative phase (interviews), an online survey was undertaken using three case scenarios (asymptomatic severe primary MR, symptomatic severe primary MR in the elderly, and severe secondary MR) in 115 primary care physicians (PCPs), and 439 cardiologists or cardiac surgeons from seven European countries...
January 2, 2018: European Heart Journal
https://www.readbyqxmd.com/read/29297330/surface-structure-feature-matching-algorithm-for-cardiac-motion-estimation
#10
Zhengrui Zhang, Xuan Yang, Cong Tan, Wei Guo, Guoliang Chen
BACKGROUND: Cardiac diseases represent the leading cause of sudden death worldwide. During the development of cardiac diseases, the left ventricle (LV) changes obviously in structure and function. LV motion estimation plays an important role for diagnosis and treatment of cardiac diseases. To estimate LV motion accurately for cine magnetic resonance (MR) cardiac images, we develop an algorithm by combining point set matching with surface structure features of myocardium. METHODS: The structure features of myocardial wall are described by estimating the normal directions of points locating on the myocardium contours using an approximation approach...
December 20, 2017: BMC Medical Informatics and Decision Making
https://www.readbyqxmd.com/read/29291394/serotonin-receptor-2b-signaling-with-interstitial-cell-activation-and-leaflet-remodeling-in-degenerative-mitral-regurgitation
#11
Kathryn H Driesbaugh, Emanuela Branchetti, Juan B Grau, Samuel J Keeney, Kimberly Glass, Mark A Oyama, Nancy Rioux, Salma Ayoub, Michael S Sacks, John Quackenbush, Robert J Levy, Giovanni Ferrari
AIMS: Mitral valve interstitial cells (MVIC) play an important role in the pathogenesis of degenerative mitral regurgitation (MR) due to mitral valve prolapse (MVP). Numerous clinical studies have observed serotonin (5HT) dysregulation in cardiac valvulopathies; however, the impact of 5HT-mediated signaling on MVIC activation and leaflet remodeling in MVP have been investigated to a limited extent. Here we test the hypothesis that 5HT receptors (5HTRs) signaling contributes to MVP pathophysiology...
December 29, 2017: Journal of Molecular and Cellular Cardiology
https://www.readbyqxmd.com/read/29289651/neutrophil-gelatinase-associated-lipocalin-from-immune-cells-is-mandatory-for-aldosterone-induced-cardiac-remodeling-and-inflammation
#12
Mathieu Buonafine, Ernesto Martínez-Martínez, Cristian Amador, Basile Gravez, Jaime Ibarrola, Amaya Fernández-Celis, Soumaya El Moghrabi, Patrick Rossignol, Natalia López-Andrés, Frédéric Jaisser
Immune system activation is involved in cardiovascular (CV) inflammation and fibrosis, following activation of the mineralocorticoid receptor (MR). We previously showed that Neutrophil Gelatinase-Associated Lipocalin (NGAL) is a novel target of MR signaling in CV tissue and plays a critical role in aldosterone/MR-dependent hypertension and fibrosis. We hypothesized that the production of NGAL by immune cells may play an important part in the mediation of these deleterious mineralocorticoid-induced effects. We analyzed the effect of aldosterone on immune cell recruitment and NGAL expression in vivo...
December 28, 2017: Journal of Molecular and Cellular Cardiology
https://www.readbyqxmd.com/read/29281062/cardiac-mr-imaging-genotoxicity
#13
Mark A Hill
No abstract text is available yet for this article.
December 20, 2017: European Heart Journal
https://www.readbyqxmd.com/read/29260346/assessment-of-mitral-regurgitation-by-3-dimensional-proximal-flow-convergence-using-magnetic-resonance-imaging-comparison-with-echo-doppler
#14
Lior Gorodisky, Yoram Agmon, Moshe Porat, Sobhi Abadi, Jonathan Lessick
To test the feasibility of assessing mitral regurgitation (MR) severity using cardiac magnetic resonance (CMR) 4D velocity vectors to quantify regurgitant volume (RVol) by analysis of the proximal flow convergence, compared to Doppler based proximal isovelocity surface area (PISA) and CMR volume-based methods. In a prospectively designed study, 27 patients with various grades of MR underwent CMR and echo-Doppler on the same day. By CMR, multiple slices were obtained parallel to the mitral valve by phase-contrast imaging, using 3D velocity vectors, as well as short-axis cine images for left and right ventricular volume measurements...
December 19, 2017: International Journal of Cardiovascular Imaging
https://www.readbyqxmd.com/read/29259787/renin-angiotensin-system-inhibitors-in-patients-with-or-without-ischaemic-mitral-regurgitation-after-acute-myocardial-infarction
#15
Kitae Kim, Shuichiro Kaji, Manabu Kasamoto, Ryosuke Murai, Yasuhiro Sasaki, Takeshi Kitai, Takafumi Yamane, Natsuhiko Ehara, Atsushi Kobori, Makoto Kinoshita, Yutaka Furukawa
Objective: Little is known about the long-term effects of renin-angiotensin system inhibitors (RASI) on cardiovascular events in patients after acute myocardial infarction (AMI) with ischaemic mitral regurgitation (IMR). The purpose of this study was to investigate the association of RASI with the incidence of adverse cardiac events in patients with or without IMR after AMI. Methods: We reviewed charts of 1208 consecutive patients admitted with AMI who underwent emergency coronary angiography between 2000 and 2012...
2017: Open Heart
https://www.readbyqxmd.com/read/29251818/acutely-decompensated-heart-failure-with-preserved-and-reduced-ejection-fraction-present-with-comparable-haemodynamic-congestion
#16
Lucas N L Van Aelst, Mattia Arrigo, Rui Placido, Eiichi Akiyama, Nicolas Girerd, Faiez Zannad, Philippe Manivet, Patrick Rossignol, Marc Badoz, Malha Sadoune, Jean-Marie Launay, Etienne Gayat, Carolyn S P Lam, Alain Cohen-Solal, Alexandre Mebazaa, Marie-France Seronde
AIMS: Congestion is a central feature of acute heart failure (HF) and its assessment is important for clinical decisions (e.g. tailoring decongestive treatments). It remains uncertain whether patients with acute HF with preserved ejection fraction (HFpEF) are comparably congested as in acute HF with reduced EF (HFrEF). This study assessed congestion, right ventricular (RV) and renal dysfunction in acute HFpEF, HFrEF and non-cardiac dyspnoea. METHODS AND RESULTS: We compared echocardiographic and circulating biomarkers of congestion in 146 patients from the MEDIA-DHF study: 101 with acute HF (38 HFpEF, 41 HFrEF, 22 HF with mid-range ejection fraction) and 45 with non-cardiac dyspnoea...
December 18, 2017: European Journal of Heart Failure
https://www.readbyqxmd.com/read/29242240/persistence-of-infarct-zone-t2-hyperintensity-at-6-months-after-acute-st-segment-elevation-myocardial-infarction-incidence-pathophysiology-and-prognostic-implications
#17
Jaclyn Carberry, David Carrick, Caroline Haig, Nadeem Ahmed, Ify Mordi, Margaret McEntegart, Mark C Petrie, Hany Eteiba, Stuart Hood, Stuart Watkins, Mitchell Lindsay, Andrew Davie, Ahmed Mahrous, Ian Ford, Naveed Sattar, Paul Welsh, Aleksandra Radjenovic, Keith G Oldroyd, Colin Berry
BACKGROUND: The incidence and clinical significance of persistent T2 hyperintensity after acute ST-segment-elevation myocardial infarction (STEMI) is uncertain. METHODS AND RESULTS: Patients who sustained an acute STEMI were enrolled in a cohort study (BHF MR-MI: NCT02072850). Two hundred eighty-three STEMI patients (mean age, 59±12 years; 75% male) had cardiac magnetic resonance with T2 mapping performed at 2 days and 6 months post-STEMI. Persisting T2 hyperintensity was defined as infarct T2 >2 SDs from remote T2 at 6 months...
December 2017: Circulation. Cardiovascular Imaging
https://www.readbyqxmd.com/read/29238923/endoscopic-therapy-and-curative-effect-in-pituitary-adenoma-patients-complicated-by-acromegalic-cardiomyopathy
#18
Heping Zhou, Zhengjiang Zha, Xiangdong Li, Xinsheng Chen, Jing Wang, Zhongzhou Su
The study aimed to retrospectively analyze the clinical characteristics of patients with pituitary adenomas complicated by acromegalic cardiomyopathy and to evaluate the effect of endoscopic surgery. Eighty-six pituitary adenoma patients complicated by acromegalic cardiomyopathy who were treated with endoscopic surgery in the First Affiliated Hospital of Soochow University from January 2010 to December 2016 were enrolled. We noted patient clinical characteristics and explored the relationships with surgical treatment...
December 13, 2017: Neurosurgical Review
https://www.readbyqxmd.com/read/29237677/genome-wide-association-study-implicates-atrial-natriuretic-peptide-rather-than-b-type-natriuretic-peptide-in-the-regulation-of-blood-pressure-in-the-general-population
#19
Perttu P Salo, Aki S Havulinna, Taru Tukiainen, Olli Raitakari, Terho Lehtimäki, Mika Kähönen, Johannes Kettunen, Minna Männikkö, Johan G Eriksson, Antti Jula, Stefan Blankenberg, Tanja Zeller, Veikko Salomaa, Kati Kristiansson, Markus Perola
BACKGROUND: Cardiomyocytes secrete atrial natriuretic peptide (ANP) and B-type natriuretic peptide (BNP) in response to mechanical stretching, making them useful clinical biomarkers of cardiac stress. Both human and animal studies indicate a role for ANP as a regulator of blood pressure with conflicting results for BNP. METHODS AND RESULTS: We used genome-wide association analysis (n=6296) to study the effects of genetic variants on circulating natriuretic peptide concentrations and compared the impact of natriuretic peptide-associated genetic variants on blood pressure (n=27 059)...
December 2017: Circulation. Cardiovascular Genetics
https://www.readbyqxmd.com/read/29237455/molecular-and-histological-effects-of-mr-guided-pulsed-focused-ultrasound-to-the-rat-heart
#20
Kee W Jang, Tsang-Wei Tu, Matthew E Nagle, Bobbi K Lewis, Scott R Burks, Joseph A Frank
BACKGROUND: Image-guided high intensity focused ultrasound has been used as an extracorporeal cardiac pacing tool and to enhance homing of stem cells to targeted tissues. However, molecular changes in the myocardium after sonication have not been widely investigated. Magnetic-resonance (MR)-guided pulsed focused ultrasound (pFUS) was targeted to the rat myocardium over a range of pressures and the microenvironmental and histological effects were evaluated over time. METHODS: Eight-to-ten-week-old Sprague-Dawley rats received T2-weighted MR images to target pFUS to the left ventricular and septum without cardiac or respiratory gating...
December 13, 2017: Journal of Translational Medicine
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