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https://www.readbyqxmd.com/read/28230187/silencing-salusin-%C3%AE-attenuates-cardiovascular-remodeling-and-hypertension-in-spontaneously-hypertensive-rats
#1
Xing-Sheng Ren, Li Ling, Bing Zhou, Ying Han, Ye-Bo Zhou, Qi Chen, Yue-Hua Li, Yu-Ming Kang, Guo-Qing Zhu
Salusin-β is a bioactive peptide involved in vascular smooth muscle cell proliferation, vascular fibrosis and hypertension. The present study was designed to determine the effects of silencing salusin-β on hypertension and cardiovascular remodeling in spontaneously hypertensive rats (SHR). Thirteen-week-old male SHR and normotensive Wistar-Kyoto rats (WKY) were subjected to intravenous injection of PBS, adenoviral vectors encoding salusin-β shRNA (Ad-Sal-shRNA) or a scramble shRNA. Salusin-β levels in plasma, myocardium and mesenteric artery were increased in SHR...
February 23, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28229989/prenatal-diagnosis-of-right-dominant-heart-in-fetuses-a-tertiary-center-experience-over-a-7-year-period
#2
Juan Feng, Mei Zhu, Hao Liang, Qiao Li
BACKGROUND: Right dominant heart (RDH) in fetuses can occur with a number of cardiac as well as noncardiac anomalies. Analysis of the enlargement of the right cardiac chamber in the fetus remains a major challenge for sonographers and echocardiographers. The aim of this study was to report the experience with prenatal diagnosis of RDH in the fetuses over a 7-year period. METHODS: Fetuses with prenatal diagnosis of RDH from July 2009 to July 2016 were evaluated in two different categories: according to the gestational age, Group I (n = 154, second trimester) and Group II (n = 298, third trimester); and according to the fetal echocardiography diagnosis, Group A (n = 452, abnormal cardiac structure) and Group B (n = 90, normal cardiac structure)...
2017: Chinese Medical Journal
https://www.readbyqxmd.com/read/28229912/mid-diastolic-left-ventricular-volume-and-mass-normal-values-for-coronary-computed-tomography-angiography
#3
Daniel Juneau, Fernanda Erthal, Owen Clarkin, Atif Alzahrani, Ali Alenazy, Alomgir Hossain, Joao R Inacio, Girish Dwivedi, Alexander J Dick, Frank J Rybicki, Benjamin J W Chow
BACKGROUND: The adoption of prospectively ECG-triggered acquisition coronary computed tomography angiography (CTA) has resulted in the inability to measure left ventricle (LV) end-diastolic volume and LV ejection fraction. However other prognostic measures such as LV mass and LV mid-diastolic volume (LVMDV) can still be assessed. The objective of this study is to establish normal reference values for LVMDV and LV mass. METHODS: Left ventricular mid-diastolic volumes and LV mass were prospectively measured in 2647 consecutive 'normal' patients undergoing prospectively ECG-triggered coronary CTA...
February 10, 2017: Journal of Cardiovascular Computed Tomography
https://www.readbyqxmd.com/read/28229626/the-role-of-hydrogen-sulfide-in-homocysteine-induced-cardiodynamic-effects-and-oxidative-stress-markers-in-the-isolated-rat-heart
#4
M Stojanovic, V Zivkovic, I Srejovic, V Jakovljevic, N Jeremic, D Djuric
This study aimed to assess the role of H2S in homocysteine-induced cardiodynamic effects in the isolated rat heart. The hearts were retrogradely perfused according to the Langendorff technique. The maximum and minimum rates of pressure in the left ventricle (dp/dt max, dp/dt min), systolic and diastolic left ventricular pressures (SLVP, DLVP), heart rate (HR), and coronary flow (CF) were measured. A spectrophotometrical method was used to measure the following oxidative stress markers: index of lipid peroxidation (thiobarbituric acid reactive substances, TBARS), nitrite level (NO2(-)), superoxide anion radicals (O2(•-)), and hydrogen peroxide (H2O2) concentrations...
December 2016: Physiol Int
https://www.readbyqxmd.com/read/28228941/renal-ischemia-reperfusion-induced-cardiac-hypertrophy-in-mice-cardiac-morphological-and-morphometric-characterization
#5
Rogério Cirino-Silva, Fernanda V Kmit, Mayra Trentin-Sonoda, Karina K Nakama, Karine Panico, Juliana M Alvim, Thiago R Dreyer, Herculano Martinho-Silva, Marcela S Carneiro-Ramos
BACKGROUND: Tissue remodeling is usually dependent on the deposition of extracellular matrix that may result in tissue stiffness and impaired myocardium contraction. OBJECTIVES: We had previously demonstrated that renal ischemia/reperfusion (I/R) is able to induce development of cardiac hypertrophy in mice. Therefore, we aimed to characterize renal I/R-induced cardiac hypertrophy. DESIGN: C57BL/6 J mice were subjected to 60 minutes' unilateral renal pedicle occlusion, followed by reperfusion (I/R) for 5, 8, 12 or 15 days...
January 2017: JRSM Cardiovascular Disease
https://www.readbyqxmd.com/read/28228310/comparison-of-pesi-echocardiogram-ctpa-and-nt-probnp-as-risk-stratification-tools-in-patients-with-acute-pulmonary-embolism
#6
A Vamsidhar, D Rajasekhar, V Vanajakshamma, A Y Lakshmi, K Latheef, C Siva Sankara, G Obul Reddy
OBJECTIVE: The aim of this study is to prospectively assess the diagnostic accuracy of pulmonary embolism severity index, echocardiogram, computed tomography pulmonary angiogram (CTPA), and N-terminal pro b-type natriuretic peptide (NT-proBNP) for predicting adverse events in acute pulmonary embolism patients. METHODS: Thirty consecutive acute pulmonary embolism patients were included in this study. Combined adverse events consisted of in-hospital death or use of escalation of care including cardiopulmonary resuscitation, mechanical ventilation, vasopressor therapy, or secondary thrombolysis during hospital stay...
January 2017: Indian Heart Journal
https://www.readbyqxmd.com/read/28227467/a-simplified-state-space-model-of-biventricular-assist-device-cardiovascular-system-interaction
#7
Vivian C A Koh, Einly Lim, Boon Chiang Ng, Yong Kuen Ho, Nigel H Lovell, Vivian C A Koh, Einly Lim, Boon Chiang Ng, Yong Kuen Ho, Nigel H Lovell, Boon Chiang Ng, Einly Lim, Vivian C A Koh, Nigel H Lovell, Yong Kuen Ho
A simplified state-space model of biventricular assist device (BiVAD)-cardiovascular system (CVS) interaction is presented. The state-space equations includes a six-compartments CVS model incorporating the ventricles, the pulmonary and systemic circulations as well as the non-linear behavior of the valve flow, together with a left ventricular assist device (LVAD) and a right ventricular assist device (RVAD) component. The left and right pump speeds serve as the input variables for the state-space model. The model is simulated with three operational modes, i...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28227463/hemodynamic-effects-of-synchronizing-an-intra-aortic-vad-in-reverse-rotation-control-with-left-ventricle-a-mock-loop-study
#8
Yaxin Wang, P Alex Smith, Daniel L Timms, Po-Lin Hsu, Richard A McMahon, Yaxin Wang, P Alex Smith, Daniel L Timms, Po-Lin Hsu, Richard A McMahon, Richard A McMahon, Daniel L Timms, Po-Lin Hsu, Yaxin Wang, P Alex Smith
The IntraVAD is an intra-aortic left ventricular assist device (LVAD) to be located in the ascending aorta. In order to enhance unloading and promote coronary flow for the left ventricle (LV), an operating mechanism, reverse-rotation control (RRc) mode, has been developed for the IntraVAD and tested in vitro in a mock circulation loop (MCL). The RRc mode consists of forward rotation (FR) and reverse rotation (RR). The synchronization between the IntraVAD and the LV was studied to offload the ventricle more effectively and to improve myocardial perfusion...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28227376/electrocardiogram-reconstruction-from-high-resolution-voltage-optical-mapping
#9
Ilija Uzelac, Conner Herndon, James Farmer, Flavio Fenton, Ilija Uzelac, Conner Herndon, James Farmer, Flavio Fenton, Ilija Uzelac, Conner Herndon, James Farmer, Flavio Fenton
Electrocardiogram recordings during opucal mapping experiments in heart tissue are commonly used tu monitor the health of the preparation and to obtain dominant frequencies during arrhythmic and defibrillatory studies. However the use of ECG reconstructed from optical mapping is seldom used and to date it has not been strictly validated. In this manuscript we present the first detailed validation and comparison of Optical Mapping ECG, or OM-ECG, with standard ECG recordings by calculating the electrostatic potential in space as a function of the voltage measured optically and describe the different approximations that can be used to obtain unipolar or bipolar ECG recordings...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28227076/analysis-of-blood-pressure-signal-in-patients-with-different-ventricular-ejection-fraction-using-linear-and-non-linear-methods
#10
Andres Arcentales, Patricio Rivera, Pere Caminal, Andreas Voss, Antonio Bayes-Genis, Beatriz F Giraldo, Andres Arcentales, Patricio Rivera, Pere Caminal, Andreas Voss, Antonio Bayes-Genis, Beatriz F Giraldo, Pere Caminal, Antonio Bayes-Genis, Andres Arcentales, Patricio Rivera, Beatriz F Giraldo, Andreas Voss
Changes in the left ventricle function produce alternans in the hemodynamic and electric behavior of the cardiovascular system. A total of 49 cardiomyopathy patients have been studied based on the blood pressure signal (BP), and were classified according to the left ventricular ejection fraction (LVEF) in low risk (LR: LVEF>35%, 17 patients) and high risk (HR: LVEF≤35, 32 patients) groups. We propose to characterize these patients using a linear and a nonlinear methods, based on the spectral estimation and the recurrence plot, respectively...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28226688/mitral-valve-annulus-localization-in-3d-echocardiography
#11
Abhishek Tiwari, Kedar A Patwardhan, Abhishek Tiwari, Kedar A Patwardhan, Kedar A Patwardhan, Abhishek Tiwari
The Mitral Valve is a structure on the left side of the human heart that regulates the flow of oxygenated blood into the Left Ventricle and also helps maintain the pressure within the Left Ventricle when the blood gets pumped to the rest of the body from the Left Ventricle. Pathology of the Mitral Valve often manifests through structural changes in the anatomy. Assessment of Mitral Valve pathology as well as determination of specific interventions require quantification of various structures of the Mitral Valve and one of these structures of interest is the Mitral Valve annulus...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28226476/ultrasound-characterization-of-interface-oscillation-as-a-proxy-for-ventriculoperitoneal-shunt-function
#12
April Joy C Aralar, Matthew D Bird, Robert D Graham, Beomseo Koo, Mahesh B Shenai, Parag V Chitnis, Siddhartha Sikdar, April Joy C Aralar, Matthew D Bird, Robert D Graham, Beomseo Koo, Mahesh B Shenai, Parag V Chitnis, Siddhartha Sikdar, Mahesh B Shenai, Beomseo Koo, Robert D Graham, Matthew D Bird, Siddhartha Sikdar, Parag V Chitnis, April Joy C Aralar
Hydrocephalus, where cerebrospinal fluid (CSF) production rate is greater than reabsorption rate, leads to impaired neurological function if left untreated. Ventriculoperitoneal shunts (VPS) are implanted in the brain ventricles to route CSF. VPS systems have a high failure rate, and failure symptoms resemble symptoms of common maladies. The current gold standard for shunt diagnosis, surgical intervention, poses high risk and requires an expensive procedure for patients. Current non-invasive methods lack proper insight to assist physicians...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28225891/soy-milk-versus-simvastatin-for-preventing-atherosclerosis-and-left-ventricle-remodeling-in-ldl-receptor-knockout-mice
#13
L Santos, A P Davel, T I R Almeida, M R Almeida, E A Soares, G J M Fernandes, S F Magalhães, V G Barauna, J A D Garcia
Functional food intake has been highlighted as a strategy for the prevention of cardiovascular diseases by reducing risk factors. In this study, we compared the effects of oral treatment with soy milk and simvastatin on dyslipidemia, left ventricle remodeling and atherosclerotic lesion of LDL receptor knockout mice (LDLr-/-) fed a hyperlipidic diet. Forty 3-month old male LDLr-/- mice were distributed into four groups: control group (C), in which animals received standard diet; HL group, in which animals were fed a hyperlipidic diet; HL+SM or HL+S groups, in which animals were submitted to a hyperlipidic diet plus soy milk or simvastatin, respectively...
February 20, 2017: Brazilian Journal of Medical and Biological Research, Revista Brasileira de Pesquisas Médicas e Biológicas
https://www.readbyqxmd.com/read/28225018/choline-ameliorates-cardiovascular-damage-by-improving-vagal-activity-and-inhibiting-the-inflammatory-response-in-spontaneously-hypertensive-rats
#14
Longzhu Liu, Yi Lu, Xueyuan Bi, Man Xu, Xiaojiang Yu, Runqing Xue, Xi He, Weijin Zang
Autonomic dysfunction and abnormal immunity lead to systemic inflammatory responses, which result in cardiovascular damage in hypertension. The aim of this report was to investigate the effects of choline on cardiovascular damage in hypertension. Eight-week-old male spontaneously hypertensive rats (SHRs) and Wistar-Kyoto rats were intraperitoneally injected with choline or vehicle (8 mg/kg/day). After 8 weeks, choline restored the cardiac function of the SHRs, as evidenced by decreased heart rate, systolic blood pressure, left ventricle systolic pressure, and ±dp/dtmax and increased ejection fraction and fractional shortening...
February 22, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28224319/fine-morphological-evaluation-of-hypothalamus-in-patients-with-hyperphagia
#15
Yoshikazu Ogawa, Kuniyasu Niizuma, Teiji Tominaga
BACKGROUND: Various metabolic diseases induced by eating disorders are some of the most serious and difficult problems for modern public healthcare. However, little is known about hyperphagia, partly because of the lack of a clear definition. Several basic studies have analyzed eating habits using endocrinological or neurophysiological approaches, which have suggested a controlled balance between the hunger and satiety centers in the central nervous system. However, more detailed neuro-radiologic evaluations have not been achieved for the hypothalamus, and evaluations were limited only to the floor of the third ventricles...
February 21, 2017: Acta Neurochirurgica
https://www.readbyqxmd.com/read/28223437/long-term-administration-of-eicosapentaenoic-acid-improves-post-myocardial-infarction-cardiac-remodeling-in-mice-by-regulating-macrophage-polarization
#16
Masayuki Takamura, Keisuke Kurokawa, Hiroshi Ootsuji, Oto Inoue, Hikari Okada, Ayano Nomura, Shuichi Kaneko, Soichiro Usui
BACKGROUND: Consumption of n-3 fatty acids reduces the incidence of cardiovascular mortality in populations that consume diets rich in fish oil. Eicosapentaenoic acid (EPA) is an n-3 fatty acid known to reduce the frequency of nonfatal coronary events; however, the frequency of mortality after myocardial infarction (MI) is not reduced. The aims of this study were to determine whether long-term administration of EPA regulated cardiac remodeling after MI and to elucidate the underlying therapeutic mechanisms of EPA...
February 21, 2017: Journal of the American Heart Association
https://www.readbyqxmd.com/read/28222393/caffeine-prevents-changes-in-muscle-caused-by-high-intensity-interval-training
#17
Juliano M Vieira, Jessié M Gutierres, Fabiano B Carvalho, Luciane B Pereira, Liziele S Oliveira, Vera Maria Morsch, Maria Rosa C Schetinger, Marília V Rodrigues, Jossiele Leitemperger, Vânia Loro, Cristina C Krewer, Marina S Vencato, Roselia M Spanevello
The use of ergogenic substances such as caffeine has become a strategy to enhance sports performance. In the present study we evaluated the effects of high-intensity interval training (HIIT) associated with caffeine intake on acetylcholinesterase (AChE) and Ca(2+)ATPase activity and glycogen levels in the muscles of rats were evaluated. The animals were divided in groups: control, caffeine 4 or 8mg/kg, HIIT, HIIT plus caffeine 4 or caffeine 8mg/kg. Our results showed a decrease in glycogen levels in muscle in all trained groups after acute session exercise, while that an increase in glycogen levels was observed in all groups in relation to control in chronic exercise protocol...
February 17, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28220274/cystic-mass-in-the-left-ventricle-suspected-thrombus-with-inhomogeneous-appearance
#18
Cristina Ruisanchez, Beatriz Carballo, Piedad Lerena
No abstract text is available yet for this article.
February 20, 2017: International Journal of Cardiovascular Imaging
https://www.readbyqxmd.com/read/28220144/results-of-late-gadolinium-enhancement-in-children-affected-by-dilated-cardiomyopathy
#19
Giuseppe Muscogiuri, Paolo Ciliberti, Domenico Mastrodicasa, Marcello Chinali, Gabriele Rinelli, Teresa Pia Santangelo, Carmela Napolitano, Benedetta Leonardi, Aurelio Secinaro
BACKGROUND: Little is known about the clinical value of late gadolinium enhancement (LGE), in children affected by dilated cardiomyopathy (DCM). MATERIALS AND METHODS: We retrospectively evaluated 15 patients (8 ± 6 years, 6 males) with diagnosis of DCM who underwent cardiac magnetic resonance since 2014. All scans were performed with a 1.5 T system (Aera, Siemens). Study protocol included cine steady-state free precession sequences, followed by administration of 0...
2017: Frontiers in Pediatrics
https://www.readbyqxmd.com/read/28219755/a-congenital-diverticulum-of-the-left-ventricular-apex-manifested-by-stroke-and-recurrent-ventricular-tachycardia
#20
Gabriela Dostálová, Tomáš Paleček, Petr Kuchynka, Štěpán Havránek, Martin Mašek, Zuzana Hlubocká, Debora Karetová, Dan Wichterle, Jaroslava Dušková, Jaroslav Lindner, Aleš Linhart
Ventricular outpouchings include acquired abnormalities (aneurysms and pseudoaneurysms) and congenital ventricular diverticula (CVD). CVD represent rare cardiac pathologies. Although CVD is often associated with other cardiac and extracardiac congenital anomalies, it can also be incidentally observed in otherwise healthy subjects. CVD may lead to significant morbidity and even have lethal consequences. We describe a case of arrhythmogenic left ventricle (LV) apical CVD revealed by cardiac magnetic resonance imaging (CMRI) after being initially overlooked by echocardiography...
February 4, 2017: Cardiovascular Pathology: the Official Journal of the Society for Cardiovascular Pathology
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