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https://www.readbyqxmd.com/read/28090760/expression-patterns-of-cardiac-aging-in-drosophila
#1
Leah Cannon, Alexander C Zambon, Anthony Cammarato, Zhi Zhang, Georg Vogler, Matthew Munoz, Erika Taylor, Jérôme Cartry, Sanford I Bernstein, Simon Melov, Rolf Bodmer
Aging causes cardiac dysfunction, often leading to heart failure and death. The molecular basis of age-associated changes in cardiac structure and function is largely unknown. The fruit fly, Drosophila melanogaster, is well-suited to investigate the genetics of cardiac aging. Flies age rapidly over the course of weeks, benefit from many tools to easily manipulate their genome, and their heart has significant genetic and phenotypic similarities to the human heart. Here, we performed a cardiac-specific gene expression study on aging Drosophila and carried out a comparative meta-analysis with published rodent data...
February 2017: Aging Cell
https://www.readbyqxmd.com/read/28073806/functional-tricuspid-regurgitation-caused-by-chronic-atrial-fibrillation-a-real-time-3-dimensional-transesophageal-echocardiography-study
#2
Hiroto Utsunomiya, Yuji Itabashi, Hirotsugu Mihara, Javier Berdejo, Sayuki Kobayashi, Robert J Siegel, Takahiro Shiota
BACKGROUND: Functional tricuspid regurgitation (TR) with a structurally normal tricuspid valve (TV) may occur secondary to chronic atrial fibrillation (AF). However, the clinical and echocardiographic differences according to functional TR subtypes are unclear. Therefore, characterization of functional TR because of chronic AF (AF-TR) remains undetermined. METHODS AND RESULTS: To investigate the prevalence of AF-TR, 437 patients with moderate to severe TR underwent 3-dimensional (3D) transesophageal echocardiography...
January 2017: Circulation. Cardiovascular Imaging
https://www.readbyqxmd.com/read/28072727/association-between-arterial-stiffness-and-left-ventricular-diastolic-function-in-relation-to-gender-and-age
#3
Hack-Lyoung Kim, Woo-Hyun Lim, Jae-Bin Seo, Woo-Young Chung, Sang-Hyun Kim, Myung-A Kim, Joo-Hee Zo
Left ventricular (LV) diastolic dysfunction and subsequent overt heart failure are more prevalent in elderly women. Close interaction between arterial stiffness and LV morphology/function has been reported. The aim of this study was to investigate whether there is an age- and gender-dependent relationship between arterial stiffness and LV diastolic function. A total of 819 subjects (58.6 ± 13.3 years, 50.2% men) without structural heart disease (LV ejection fraction ≥50%) were retrospectively analyzed...
January 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28070903/myocardial-deformation-in-pediatric-patients-with-mucopolysaccharidoses-a-two-dimensional-speckle-tracking-echocardiography-study
#4
Francesco Borgia, Enrica Pezzullo, Vincenzo Schiano Lomoriello, Regina Sorrentino, Francesco Lo Iudice, Sara Cocozza, Roberto Della Casa, Giancarlo Parenti, Pietro Strisciuglio, Bruno Trimarco, Maurizio Galderisi
BACKGROUND: Mucopolysaccharidoses (MPS) are inherited lysosomal storage disorders caused by deficiency of required glycosaminoglycans breakdown enzymes, inducing cardiac involvement. Little is known about myocardial deformation involvement in MPS. Our aim was to assess biventricular structure and function in asymptomatic children with MPS using standard echo Doppler and 2D speckle tracking (STE). METHODS: Fifteen MPS children (one type I, six type II, three type III A, one III B, three IV A, one VI), asymptomatic for cardiac symptoms, and 15 age and sex-matched healthy controls underwent echo Doppler and STE...
January 10, 2017: Echocardiography
https://www.readbyqxmd.com/read/28062018/atrial-fibrillation-in-a-structurally-normal-heart-during-pregnancy-a-review-of-cases-from-a-registry-and-from-the-literature
#5
Nadine Sauvé, Évelyne Rey, Annabelle Cumyn
OBJECTIVES: Atrial fibrillation (AF) in a structurally normal heart is rare during pregnancy. We wished to use our experience to expand the literature on the causes and management of this condition. METHODS: All members of Groupe d'Étude en Médecine Obstétricale du Québec (GÉMOQ) were invited to record cases of AF in a structurally normal heart during pregnancy to the group's Registry. We searched Medline, PubMed, and Google Scholar (1946 to 15 April 2016) for relevant articles using the key words "atrial fibrillation" and "pregnancy...
January 2017: Journal of Obstetrics and Gynaecology Canada: JOGC, Journal D'obstétrique et Gynécologie du Canada: JOGC
https://www.readbyqxmd.com/read/28060289/high-resolution-optical-mapping-of-the-mouse-sino-atrial-node
#6
Di Lang, Alexey V Glukhov
Sino-atrial node (SAN) dysfunctions and associated complications constitute important causes of morbidity in patients with cardiac diseases. The development of novel pharmacological therapies to cure these patients relies on the thorough understanding of both normal physiology and pathophysiology of the SAN. Among the studies of cardiac pacemaking, the mouse SAN is widely used due to its feasibility for modifications in the expression of different genes that encode SAN ion channels or calcium handling proteins...
December 2, 2016: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/28050606/long-term-exposure-to-space-s-microgravity-alters-the-time-structure-of-heart-rate-variability-of-astronauts
#7
Kuniaki Otsuka, Germaine Cornelissen, Satoshi Furukawa, Yutaka Kubo, Mitsutoshi Hayashi, Koichi Shibata, Koh Mizuno, Tatsuya Aiba, Hiroshi Ohshima, Chiaki Mukai
BACKGROUND: Spaceflight alters human cardiovascular dynamics. The less negative slope of the fractal scaling of heart rate variability (HRV) of astronauts exposed long-term to microgravity reflects cardiovascular deconditioning. We here focus on specific frequency regions of HRV. METHODS: Ten healthy astronauts (8 men, 49.1 ± 4.2 years) provided five 24-hour electrocardiographic (ECG) records: before launch, 20.8 ± 2.9 (ISS01), 72.5 ± 3.9 (ISS02) and 152.8 ± 16...
December 2016: Heliyon
https://www.readbyqxmd.com/read/28048860/su-f-p-54-guidelines-to-check-image-registration-qa-of-a-clinical-deformation-registration-software-a-single-institution-preliminary-study
#8
G Gill, S Souri, A Rea, Y Chen, J Antone, X Qian, A Riegel, P Taylor, M Marrero, F Diaz, Y Cao, A Jamshidi, S Barley, V Sorell, G Karangelis, T Button, E Klein
PURPOSE: The objective of this study is to verify and analyze the accuracy of a clinical deformable image registration (DIR) software. METHODS: To test clinical DIR software qualitatively and quantitatively, we focused on lung radiotherapy and analyzed a single (Lung) patient CT scan. Artificial anatomical changes were applied to account for daily variations during the course of treatment including the planning target volume (PTV) and organs at risk (OAR). The primary CT (pCT) and the structure set (pST) was deformed with commercial tool (ImSimQA-Oncology Systems Limited) and after artificial deformation (dCT and dST) sent to another commercial tool (VelocityAI-Varian Medical Systems)...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28048396/su-f-t-455-is-contouring-the-whole-breast-necessary-for-two-field-3d-breast-planning
#9
A Desai, Eric Ku, D Fang, C Lawrence, C Iannuzzi, C Shi
PURPOSE: To investigate the effect of contouring the whole breast on reducing the radiation dose to the heart and affected lung in tangential field-in-field 3D breast planning. We hypothesize that contouring the whole breast will simplify the plan normalization process, reduce dose to critical structures, while maintaining treatment plan quality and consistency. METHODS: Twenty previously treated breast cancer patients using tangential field-in-field 3D planning technique were randomly selected...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28046628/su-f-t-187-quantifying-normal-tissue-sparing-with-4d-robust-optimization-of-intensity-modulated-proton-therapy
#10
M Newpower, S Ge, R Mohan
PURPOSE: To report an approach to quantify the normal tissue sparing for 4D robustly-optimized versus PTV-optimized IMPT plans. METHODS: We generated two sets of 90 DVHs from a patient's 10-phase 4D CT set; one by conventional PTV-based optimization done in the Eclipse treatment planning system, and the other by an in-house robust optimization algorithm. The 90 DVHs were created for the following scenarios in each of the ten phases of the 4DCT: ± 5mm shift along x, y, z; ± 3...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28032672/hippocampal-damage-and-memory-impairment-in-congenital-cyanotic-heart-disease
#11
Mónica Muñoz-López, Aparna Hoskote, Martin J Chadwick, Anna M Dzieciol, David G Gadian, Kling Chong, Tina Banks, Michelle de Haan, Torsten Baldeweg, Mortimer Mishkin, Faraneh Vargha-Khadem
Neonatal hypoxia can lead to hippocampal atrophy, which can lead, in turn, to memory impairment. To test the generalisability of this causal sequence, we examined a cohort of 41 children aged 8-16, who, having received the arterial switch operation to correct for transposition of the great arteries, had sustained significant neonatal cyanosis but were otherwise neurodevelopmentally normal. As predicted, the cohort had significant bilateral reduction of hippocampal volumes relative to the volumes of 64 normal controls...
December 29, 2016: Hippocampus
https://www.readbyqxmd.com/read/28031851/a-good-excuse-for-skipping-the-test-electrical-storm-in-a-teenager
#12
Patrícia Rodrigues, António Pinheiro-Vieira, Marília Loureiro, Sílvia Álvares, Diana Anjo, Carla Roque, Maria João Sousa, Severo Torres
We describe the case of a teenager with a structurally normal heart that presented with torsades de pointes and cardiac arrest. He had a history of epilepsy in childhood, mild cognitive impairment and cognitive visual dysfunction. The baseline electrocardiogram had prominent J waves and a marked early repolarization pattern in all the leads, with normal QT interval. We discuss the differential diagnosis for this interesting case, as well as the patient's management.
December 2016: Oxford Medical Case Reports
https://www.readbyqxmd.com/read/28029075/connexin43-and-myocardial-ischemia-reperfusion-injury
#13
Lingyun Zu, Ningxin Wen, Changjie Liu, Mingming Zhao, Lemin Zheng
The treatment and prevention of ischemic cardiomyopathy is one of the most concerned research points in cardiovascular field recently. Gap junction is the basic structure of cardiac electrophysiology, connexin is the basic unit of gap junctions, Connexin43(Cx43) is the most abundant member of Cx family in heart ,the normal expression of Cx43 is crucial for heart development,electrically coupled cardiomyocytes activities and the regulation of myocardial function. The connection between Cx43 and myocardial ischemia/reperfusion or reperfusion injury has become the current research focus...
December 27, 2016: Cardiovascular & Hematological Disorders Drug Targets
https://www.readbyqxmd.com/read/28027560/structural-and-functional-state-of-heart-left-ventricle-depending-on-polymorphism-rs966221-phosphodiesterase-4d-gene-in-emergency-workers-of-the-chornobyl-npp-suffering-from-coronary-heart-disease
#14
O Nastina, G Pleskach, N Kursina, O Bazyka, O Makarevich, I Abramenko, A Chumak, D Belyi
OBJECTIVE: This study consisted in examination the features of structural and functional state of the cardiovascular system in emergency workers (EW) of the Chernobyl nuclear power plant (ChNPP) who suffered from coronary heart disease (CHD) and having different genotypes due to polymorphism rs966221 phosphodiesterase 4D (PDE4D) gene. MATERIALS AND METHODS: The study involved 121 EW and 63 non irradiated patients with CHD. Standardized survey included echo doppler cardiography (EchoCG) that was done by Diagnostic Ultrasound System DS N3 (Mindray)...
December 2016: Problemy Radiat︠s︡iĭnoï Medyt︠s︡yny Ta Radiobiolohiï
https://www.readbyqxmd.com/read/28013417/left-atrial-mechanics-strongly-predict-functional-capacity-assessed-by-cardiopulmonary-exercise-testing-in-subjects-without-structural-heart-disease
#15
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/28006998/supraventricular-tachycardia-during-the-first-year-of-life-is-subclinical-inflammation-the-trigger
#16
P P Bassareo, V Fanos, M Pala, L Antonucci, P Neroni, R Antonucci, G Mercuro
BACKGROUND: Neutrophil/lymphocyte ratio (NLR) and red cell distribution width (RDW) may be associated with the onset of arrhythmias in adults, thus underlining a possible inflammatory etiology. Paroxysmal supraventricular tachycardia (SVT) is the most frequent pathological tachycardia in childhood. AIMS: To verify NLR and RDW levels in a group of children (<1 year) affected by SVT with a structurally normal heart and without fever nor inflammatory diseases; to compare NLR and RDW before and after SVT resolution, to verify whether the latter was related with the reduction in inflammatory state; to identify -in SVT subtypes caused by a re-entry mechanism- an NLR and RDW cut-off point beyond which adenosine was ineffective in preventing SVT recurrence...
December 23, 2016: Journal of Maternal-fetal & Neonatal Medicine
https://www.readbyqxmd.com/read/28003648/cardiac-structural-remodeling-in-hypertensive-cardiomyopathy
#17
Si-Jia Sun, Jia-Lu Yao, Lang-Biao Xu, Qing Rui, Nan-Nan Zhang, Min Chen, Yu-Feng Jiang, Hua-Jia Yang, Ya-Feng Zhou
Heart failure with preserved ejection fraction (HFpEF), which is a primary driver of morbidity and mortality, accounts for approximately half of all heart failure cases. Therefore, it is essential to develop preclinical animal models for HFpEF pharmacological treatment strategies. We created a porcine model of severe hypertension and hyperlipidemia by using a combination of deoxycorticosterone acetate (DOCA, 100 mg kg(-1)), Western diet (WD) and angiotensin II infusion. Systolic blood pressure, echocardiography and invasive pressure-volume loop were assessed at baseline, 12 weeks and 18 weeks...
December 22, 2016: Hypertension Research: Official Journal of the Japanese Society of Hypertension
https://www.readbyqxmd.com/read/28000227/variants-of-brugada-syndrome-and-early-repolarization-syndrome-an-expanded-concept-of-j-wave-syndrome
#18
Sung-Hwan Kim, Gi-Byoung Nam, Sung-Cheol Yun, Hyung Oh Choi, Kee-Joon Choi, Boyoung Joung, Hui-Nam Pak, Moon-Hyoung Lee, Sung Soon Kim, Seung-Jung Park, Young Keun On, June Soo Kim, Il-Young Oh, Eue-Keun Choi, Seil Oh, Yun-Shik Choi, Jong Il Choi, Sang Weon Park, Young-Hoon Kim, Yong-Seog Oh, Man Young Lee, Hong Euy Lim, Young-Soo Lee, Yongkeun Cho, Jun Kim, Kyoung-Suk Rhee, Dong-Il Lee, Dae Kyoung Cho, You-Ho Kim
BACKGROUND: The role of J-waves in the pathogenesis of ventricular fibrillation (VF) occurring in structurally normal hearts is important. METHODS: We evaluated 127 patients who received an implantable cardioverter-defibrillator (ICD) for Brugada syndrome (BS, n = 53), early repolarization syndrome (ERS, n = 24), and patients with unknown or deferred diagnosis (n = 50). ECG, clinical characteristics, and ICD data were analyzed. RESULTS: J-waves were found in 27/50 patients with VF of unknown/deferred diagnosis...
December 20, 2016: Pacing and Clinical Electrophysiology: PACE
https://www.readbyqxmd.com/read/27989374/functional-quality-of-life-and-neurodevelopmental-outcomes-after-congenital-cardiac-surgery
#19
REVIEW
Megan L Ringle, Gil Wernovsky
Throughout the past few decades, advances in cardiology, neonatal intensive care, and surgical techniques have resulted in a growing cohort of thriving school-aged children with previously lethal complex congenital heart diseases. While survival has increased, there remains significant morbidity following repair including neurodevelopmental sequelae. Compared to children with a structurally normal heart, these infants and children have a higher frequency of abnormalities in tone, feeding, and delayed developmental milestones, as well as challenges with speech and learning disabilities, while a higher proportion of adolescents suffer from problems with processing speed, executive function, and a unique set of medical hardships related to exercise intolerance and obesity, medication burden, and mental health comorbidities...
December 2016: Seminars in Perinatology
https://www.readbyqxmd.com/read/27989075/maldi-imaging-mass-spectrometry-as-a-lipidomic-approach-to-heart-valve-research
#20
Peggi M Angel, Ahmed S Bayoumi, Robert B Hinton, Yan Ru Su, David Bichell, John E Mayer, H Scott Baldwin, Richard M Caprioli
BACKGROUND: Valvular disease is characterized in part by lipid deposition, but systematic analysis of the patterns of global lipid expression in healthy and diseased valve tissues are unknown. This is due in part to tissue limitations for lipidomic preparations and technologies for evaluating lipid distribution in tissues. The study aim was to examine the application of matrixassisted laser desorption ionization imaging mass spectrometry (MALDI IMS) to the aortic valve during development and disease, as an approach to detect and map lipids and ultimately better understand valve structure and function...
March 2016: Journal of Heart Valve Disease
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