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https://www.readbyqxmd.com/read/28527317/fully-automatic-segmentation-of-left-ventricular-anatomy-in-3-d-lge-mri
#1
Tanja Kurzendorfer, Christoph Forman, Michaela Schmidt, Christoph Tillmanns, Andreas Maier, Alexander Brost
The current challenge for electrophysiology procedures, targeting the left ventricle, is the localization and qualification of myocardial scar. Late gadolinium enhanced magnetic resonance imaging (LGE-MRI) is the current gold standard to visualize regions of myocardial infarction. Commonly, a stack of 2-D images is acquired of the left ventricle in short-axis orientation. Recently, 3-D LGE-MRI methods were proposed that continuously cover the whole heart with a high resolution within a single acquisition. The acquisition promises an accurate quantification of the myocardium to the extent of myocardial scarring...
May 8, 2017: Computerized Medical Imaging and Graphics: the Official Journal of the Computerized Medical Imaging Society
https://www.readbyqxmd.com/read/28526910/expression-and-regulation-of-type-2a-protein-phosphatases-and-alpha4-signalling-in-cardiac-health-and-hypertrophy
#2
Olga Eleftheriadou, Andrii Boguslavskyi, Michael R Longman, Jonathan Cowan, Asvi Francois, Richard J Heads, Brian E Wadzinski, Ali Ryan, Michael J Shattock, Andrew K Snabaitis
Cardiac physiology and hypertrophy are regulated by the phosphorylation status of many proteins, which is partly controlled by a poorly defined type 2A protein phosphatase-alpha4 intracellular signalling axis. Quantitative PCR analysis revealed that mRNA levels of the type 2A catalytic subunits were differentially expressed in H9c2 cardiomyocytes (PP2ACβ > PP2ACα > PP4C > PP6C), NRVM (PP2ACβ > PP2ACα = PP4C = PP6C), and adult rat ventricular myocytes (PP2ACα > PP2ACβ > PP6C > PP4C)...
July 2017: Basic Research in Cardiology
https://www.readbyqxmd.com/read/28526806/the-relationship-among-cardiac-structure-dietary-salt-and-aldosterone-in-patients-with-primary-aldosteronism
#3
Chi-Sheng Hung, Xue-Ming Wu, Ching-Way Chen, Ying-Hsien Chen, Vin-Cent Wu, Che-Wei Liao, Yi-Yao Chang, Ruh-Fang Yen, Ching-Chu Lu, Mao-Yuan M Su, Kao-Lang Liu, Chin-Chen Chang, Li-Yu Daisy Liu, Kwan-Dun Wu, Yen-Hung Lin
Salt intake is highly associated with cardiac structure in patients with primary aldosteronism (PA). We investigated the association among dietary salt intake, aldosterone and left ventricular mass in patients with PA. We enrolled 158 patients with PA and 158 patients with essential hypertension. We measured 24-hour urinary sodium (UNa) and aldosterone (UAldo) level and echocardiography parameters. In patients with PA, the UAldo level was positively correlated with left ventricular mass index (LVMI; r=0.231, p=0...
April 28, 2017: Oncotarget
https://www.readbyqxmd.com/read/28526702/t-wave-morphology-restitution-predicts-sudden-cardiac-death-in-patients-with-chronic-heart-failure
#4
Julia Ramírez, Michele Orini, Ana Mincholé, Violeta Monasterio, Iwona Cygankiewicz, Antonio Bayés de Luna, Juan Pablo Martínez, Esther Pueyo, Pablo Laguna
BACKGROUND: Patients with chronic heart failure are at high risk of sudden cardiac death (SCD). Increased dispersion of repolarization restitution has been associated with SCD, and we hypothesize that this should be reflected in the morphology of the T-wave and its variations with heart rate. The aim of this study is to propose an electrocardiogram (ECG)-based index characterizing T-wave morphology restitution (TMR), and to assess its association with SCD risk in a population of chronic heart failure patients...
May 19, 2017: Journal of the American Heart Association
https://www.readbyqxmd.com/read/28526653/genetic-variants-of-interleukin-18-are-associated-with-reduced-risk-of-atrial-fibrillation-in-a-population-from-northeast-china
#5
Ying-Hui Wang, Lin Fu, Bo Wang, Shu-Feng Li, Zhao Sun, Ying Luan
Atrial fibrillation (AF) affects approximately 1-2% of general population. Chronic inflammation plays an important role in AF development and interleukin-18 (IL-18) is a pro-inflammatory cytokine. This study aimed to assess the association of single nucleotide polymorphisms (SNPs) of IL-18 for with AF risk. Blood samples were taken from 243 AF patients and 160 non-AF individuals from a Chinese population and subjected to genotyping for six IL-18 SNPs using the MassArray system. Association of individual SNPs with AF risk was analyzed using SAS version 9...
May 16, 2017: Gene
https://www.readbyqxmd.com/read/28526546/acute-coronary-syndromes-in-the-very-elderly-short-term-prognostic-performance-of-the-syntax-score
#6
Laurent Faroux, Sophie Tassan-Mangina, Benoit Herce, Pierre Nazeyrollas, Karine Bauley, Damien Metz
Acute coronary syndromes (ACS) frequently occur in elderly subjects. The high mortality associated with ACS in this population justifies the identification of factors related to poor prognosis. We aimed to evaluate the short-term prognostic performance of the SYNTAX score in a population of patients aged 85years or more presenting ACS and undergoing coronary angiography. Secondary objectives were to identify factors related to length of stay and potential markers of in-hospital death. We performed a retrospective, single-centre prognostic study including patients aged 85years or more who underwent coronary angiography for ACS over a 4year period...
May 12, 2017: International Journal of Cardiology
https://www.readbyqxmd.com/read/28526544/interleukin-18-gene-deletion-protects-against-sepsis-induced-cardiac-dysfunction-by-inhibiting-pp2a-activity
#7
Yoshitaka Okuhara, Shunichi Yokoe, Toshihiro Iwasaku, Akiyo Eguchi, Koichi Nishimura, Wen Li, Makiko Oboshi, Yoshiro Naito, Toshiaki Mano, Michio Asahi, Haruki Okamura, Tohru Masuyama, Shinichi Hirotani
BACKGROUND: Interleukin-18 (IL-18) neutralization protects against lipopolysaccharide (LPS)-induced injuries, including myocardial dysfunction. However, the mechanism is yet to be fully elucidated. The aim of the present study was to determine whether IL-18 gene deletion prevents sepsis-induced cardiac dysfunction and to elucidate the potential mechanisms underlying IL-18-mediated cardiotoxicity by LPS. METHODS AND RESULTS: Ten-week-old male wild-type (WT) and IL-18 knockout (IL-18 KO) mice were intraperitoneally administered LPS...
May 4, 2017: International Journal of Cardiology
https://www.readbyqxmd.com/read/28526543/thyroid-hormone-biosynthesis-machinery-is-altered-in-the-ischemic-myocardium-an-epigenomic-study
#8
Carolina Gil-Cayuela, Esther Roselló-LLetí, Estefanía Tarazón, Ana Ortega, Juan Sandoval, Luis Martínez-Dolz, Juan Cinca, Esther Jorge, José Ramón González-Juanatey, Francisca Lago, Miguel Rivera, Manuel Portolés
BACKGROUND: Abnormal thyroid hormone (TH) metabolism is significantly associated with impaired left ventricular (LV) function and death. Although TH was traditionally thought to be produced exclusively by the thyroid gland, an increasing number of studies report TH production in other tissues. Based on these findings, we evaluated whether the genes required for TH biosynthesis are expressed in the human heart, and whether their expression is altered in patients with ischemic cardiomyopathy (ICM) and is related to epigenetic variations...
May 11, 2017: International Journal of Cardiology
https://www.readbyqxmd.com/read/28526542/two-year-outcome-and-risk-factors-for-mortality-in-patients-with-coronary-artery-disease-and-renal-failure-the-prospective-observational-cad-ref-registry
#9
Christiane Engelbertz, Holger Reinecke, Günter Breithardt, Roland E Schmieder, Manfred Fobker, Dieter Fischer, Boris Schmitz, Hans O Pinnschmidt, Karl Wegscheider, Hermann Pavenstädt, Eva Brand
BACKGROUND: Chronic kidney disease (CKD) and coronary artery disease (CAD) are strongly associated. CAD is the most frequent cause of cardiovascular death in patients with CKD. METHODS: The prospective observational nationwide multicenter Coronary Artery Disease and REnal Failure (CAD-REF) Registry enrolled 3352 patients with angiographically documented CAD classified according to their baseline estimated glomerular filtration rate (eGFR) into 5 groups according to the K/DOQI-guidelines...
May 7, 2017: International Journal of Cardiology
https://www.readbyqxmd.com/read/28526538/trastuzumab-emtansine-versus-treatment-of-physician-s-choice-in-patients-with-previously-treated-her2-positive-metastatic-breast-cancer-th3resa-final-overall-survival-results-from-a-randomised-open-label-phase-3-trial
#10
Ian E Krop, Sung-Bae Kim, Antonio Gonzalez Martin, Patricia M LoRusso, Jean-Marc Ferrero, Tanja Badovinac-Crnjevic, Silke Hoersch, Melanie Smitt, Hans Wildiers
BACKGROUND: In the randomised, parallel assignment, open-label, phase 3 TH3RESA study, progression-free survival was significantly longer with trastuzumab emtansine versus treatment of physician's choice in previously treated patients with HER2-positive advanced breast cancer. We report results from the final overall survival analysis of the TH3RESA trial. METHODS: Eligible patients for the TH3RESA trial were men and women (aged ≥18 years) with centrally confirmed HER2-positive advanced breast cancer previously treated with both trastuzumab and lapatinib (advanced setting) and a taxane (any setting) and with progression on two or more HER2-directed regimens in the advanced setting...
May 16, 2017: Lancet Oncology
https://www.readbyqxmd.com/read/28526505/new-anticoagulant-coatings-and-hemostasis-assessment-tools-to-avoid-complications-with-pediatric-left-ventricular-assist-devices
#11
EDITORIAL
Daniel C Leslie, Anna Waterhouse, Donald E Ingber
No abstract text is available yet for this article.
April 24, 2017: Journal of Thoracic and Cardiovascular Surgery
https://www.readbyqxmd.com/read/28526502/hemodynamic-parameters-predict-adverse-outcomes-following-biventricular-conversion-with-single-ventricle-palliation-takedown
#12
Melissa A Herrin, David Zurakowski, Christopher W Baird, Puja Banka, Jesse J Esch, Pedro J Del Nido, Sitaram M Emani
OBJECTIVE: Patients with a borderline left ventricular hypoplasia in the hypoplastic left heart syndrome variant or an unbalanced atrioventricular canal who undergo initial single-ventricle palliation may be candidates for biventricular (BiV) conversion following left ventricle (LV) recruitment procedures. We investigated associations among preoperative parameters and postoperative outcomes in patients undergoing BiV conversion. METHODS: We performed a retrospective review of patients who underwent BiV conversion to determine variables associated with clinical outcomes...
April 11, 2017: Journal of Thoracic and Cardiovascular Surgery
https://www.readbyqxmd.com/read/28526500/pulmonary-function-tests-do-not-predict-mortality-in-patients-undergoing-continuous-flow-left-ventricular-assist-device-implantation
#13
Edo K S Bedzra, Todd F Dardas, Richard K Cheng, Jay D Pal, Claudius Mahr, Jason W Smith, Kent Shively, S Carolina Masri, Wayne C Levy, Nahush A Mokadam
OBJECTIVES: To investigate the effect of pulmonary function testing on outcomes after continuous flow left ventricular assist device implantation. METHODS: A total of 263 and 239 patients, respectively, had tests of forced expiratory volume in 1 second and diffusing capacity of the lungs for carbon monoxide preoperatively for left ventricular assist device implantations between July 2005 and September 2015. Kaplan-Meier analysis and multivariable Cox regressions were performed to evaluate mortality...
April 11, 2017: Journal of Thoracic and Cardiovascular Surgery
https://www.readbyqxmd.com/read/28526353/stretch-activated-two-pore-domain-k2p-potassium-channels-in-the-heart-focus-on-atrial-fibrillation-and-heart-failure
#14
REVIEW
Constanze Schmidt, Felix Wiedmann, Stefan M Kallenberger, Antonius Ratte, Jan S Schulte, Beatrix Scholz, Frank Ulrich Müller, Niels Voigt, Maria-Patapia Zafeiriou, Joachim R Ehrlich, Ursula Tochtermann, Gábor Veres, Arjang Ruhparwar, Matthias Karck, Hugo A Katus, Dierk Thomas
Two-pore-domain potassium (K2P) channels modulate cellular excitability. The significance of stretch-activated cardiac K2P channels (K2P2.1, TREK-1, KCNK2; K2P4.1, TRAAK, KCNK4; K2P10.1, TREK-2, KCNK10) in heart disease has not been elucidated in detail. The aim of this work was to assess expression and remodeling of mechanosensitive K2P channels in atrial fibrillation (AF) and heart failure (HF) patients in comparison to murine models. Cardiac K2P channel levels were quantified in atrial (A) and ventricular (V) tissue obtained from patients undergoing open heart surgery...
May 16, 2017: Progress in Biophysics and Molecular Biology
https://www.readbyqxmd.com/read/28526037/off-pump-sutureless-repair-for-ischemic-left-ventricular-free-wall-rupture-a-systematic-review
#15
REVIEW
Yoshio Misawa
BACKGROUND: Clinical results of ischemic left ventricular free-wall rupture show high mortality rates. METHODS: We reviewed studies published after 1993 on PubMed. RESULTS: A sutureless technique using fibrin glue sheets or patches with/without fibrin glue might contribute to improved clinical results. However, some technique limitations remain for blowout-type ruptures, and the possibility of a pseudoaneurysm formation at the repair site after surgery should be considered...
May 19, 2017: Journal of Cardiothoracic Surgery
https://www.readbyqxmd.com/read/28526033/effects-of-exenatide-on-cardiac-function-perfusion-and-energetics-in-type-2-diabetic-patients-with-cardiomyopathy-a-randomized-controlled-trial-against-insulin-glargine
#16
Weena J Y Chen, Michaela Diamant, Karin de Boer, Hendrik J Harms, Lourens F H J Robbers, Albert C van Rossum, Mark H H Kramer, Adriaan A Lammertsma, Paul Knaapen
BACKGROUND: Multiple bloodglucose-lowering agents have been linked to cardiovascular events. Preliminary studies showed improvement in left ventricular (LV) function during glucagon-like peptide-1 receptor agonist administration. Underlying mechanisms, however, are unclear. The purpose of this study was to investigate myocardial perfusion and oxidative metabolism in type 2 diabetic (T2DM) patients with LV systolic dysfunction as compared to healthy controls. Furthermore, effects of 26-weeks of exenatide versus insulin glargine administration on cardiac function, perfusion and oxidative metabolism in T2DM patients with LV dysfunction were explored...
May 19, 2017: Cardiovascular Diabetology
https://www.readbyqxmd.com/read/28525971/left-ventricular-mural-thrombus-and-dual-coronary-embolization-associated-with-hyperthyroid-cardiomyopathy-and-atrial-fibrillation-a-case-report
#17
Guohui Liu, Ping Yang, Yuquan He
BACKGROUND: The majority of acute myocardial infarction (AMI) events are caused by thrombotic occlusion of the coronary artery, secondary to atherosclerotic plaque erosion or rupture. However, coronary embolism (CE), while rare, is being increasingly recognized as an important cause of AMI. We present the case of a patient with multi-site coronary artery embolization associated with hyperthyroid-related cardiomyopathy and atrial fibrillation. CASE PRESENTATION: A 49-year-old female with a history of hyperthyroidism and atrial fibrillation (AF) was admitted to our hospital presenting with right upper limb pain and swelling...
May 19, 2017: BMC Cardiovascular Disorders
https://www.readbyqxmd.com/read/28525921/a-new-electrogram-based-diagnostic-algorithm-to-improve-the-left-ventricular-effective-pacing-detection-corrected-a-non-response-to-cardiac-resynchronization-therapy-pacing
#18
Roberto Matía, Antonio Hernández-Madrid, Ruth Nicholson Klepfer, Subham Ghosh, Gonzalo Sánchez-Huete, Javier Moreno
No abstract text is available yet for this article.
May 1, 2017: Europace: European Pacing, Arrhythmias, and Cardiac Electrophysiology
https://www.readbyqxmd.com/read/28525920/torsade-de-pointes-arrhythmias-arise-at-the-site-of-maximal-heterogeneity-of-repolarization-in-the-chronic-complete-atrioventricular-block-dog
#19
Albert Dunnink, Thom R G Stams, Alexandre Bossu, Veronique M F Meijborg, Jet D M Beekman, Sofieke C Wijers, Jacques M T De Bakker, Marc A Vos
Aims: The chronic complete atrioventricular block (CAVB) dog is highly sensitive for drug-induced torsade de pointes (TdP) arrhythmias. Focal mechanisms have been suggested as trigger for TdP onset; however, its exact mechanism remains unclear. In this study, detailed mapping of the ventricles was performed to assess intraventricular heterogeneity of repolarization in relation to the initiation of TdP. Methods and results: In 8 CAVB animals, 56 needles, each containing 4 electrodes, were inserted in the ventricles...
May 1, 2017: Europace: European Pacing, Arrhythmias, and Cardiac Electrophysiology
https://www.readbyqxmd.com/read/28525856/oleuropein-prevents-the-development-of-experimental-autoimmune-myocarditis-in-rats
#20
Jia-Ying Zhang, Zheng Yang, Kun Fang, Zhan-Li Shi, Dan-Hong Ren, Jing Sun
Oleuropein (OLE) is a natural secoiridoid that is derived from Olea europaea. OLE possesses cardioprotective effects in experimental models of hypertension, myocardial infarction, atherosclerosis and hyperlipidaemia. In the present study, the effects of OLE on experimental autoimmune myocarditis (EAM) were evaluated. EAM in rats were induced by subcutaneous injections of porcine cardiac myosin. Cardiac function parameters, myocardial pathology, myocardial inflammatory cell infiltration and nuclear factor kappa-B (NF-κB) expression were measured...
May 16, 2017: International Immunopharmacology
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