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https://www.readbyqxmd.com/read/28749256/echocardiographic-findings-of-bidimensional-mode-m-mode-and-doppler-of-clinically-normal-black-rumped-agouti-dasyprocta-prymnolopha-wagler-1831
#1
Anaemilia das Neves Diniz, Gerson Tavares Pessoa, Laecio da Silva Moura, André Braga de Sousa, Francisco das Chagas Araújo Sousa, Renan Paraguassu de Sá Rodrigues, Maria Angélica Parente da Silva Barbosa, Hatawa Melo de Almeida, Larisse Danielle Silva Freire, Marina Pinto Sanches, Antônio Augusto Nascimento Machado Júnior, Porfírio Candanedo Guerra, Willams Costa Neves, João Macedo de Sousa, Luiz Bolfer, Robson Fortes Giglio, Flávio Ribeiro Alves
The black-rumped agouti ( Dasyprocta prymnolopha , Wagler 1831) is currently under intense ecologic pressure, which has resulted in its disappearance from some regions of Brazil. Echocardiography is widely used in veterinary medicine but it is not yet part of the clinical routine for wild animals. The objective of the present study was to assess the applicability of the echocardiographic exam in nonanesthetized agouti and to establish normal reference values for echocardiographic measurements in bidimensional mode (2D), M-mode, and Doppler for this species, and a lead II electrocardiogram was simultaneously recorded...
June 2017: Journal of Zoo and Wildlife Medicine: Official Publication of the American Association of Zoo Veterinarians
https://www.readbyqxmd.com/read/28748877/vitamin-d-levels-and-other-biochemical-parameters-of-mineral-bone-disorders-and-their-association-with-diastolic-dysfunction-and-left-ventricular-mass-in-young-nondiabetic-adult-patients-with-chronic-kidney-disease
#2
Satyendra Kumar Sonkar, Mohit Bhutani, Gyanendra Kumar Sonkar, Sant Kumar Pandey, Sharad Chandra, Vivek Bhosale
Cardiovascular disease (CVD) is the leading cause of morbidity and mortality in patients with end-stage renal disease. Chronic kidney disease (CKD)-associated cardiovascular mortality is more prevalent in those with diastolic heart failure and is an early predictor, while increased left ventricular mass (LVM) is a strong independent risk factor. Hypovitaminosis D is extensively being studied as a nontraditional risk factor for CVD. The aim of the present study is to look at the association of Vitamin D and other parameters of mineral bone disorder (MBD) with diastolic dysfunction and LVM in nondiabetic young adult patients with CKD...
July 2017: Saudi Journal of Kidney Diseases and Transplantation
https://www.readbyqxmd.com/read/28737016/grade-i-diastolic-dysfunction-and-elevated-left-ventricular-end-diastolic-pressure-mitral-doppler-inflow-pulmonary-vein%C3%A2-atrial-reversal-and-the-m-mode-mitral-b-bump
#3
Edmund K Kerut, Elizabeth McIlwain, Rick A Nishimura
Grade I diastolic dysfunction (DD) is generally associated with a normal mean left atrial pressure (LAP) and normal left ventricular end-diastolic pressure (LVEDP). The first hemodynamic alteration seen in DD, however, is the development of an elevated LVEDP with a persistent normal LAP. This is manifested by echocardiography as a continued mitral pulsed wave (PW) E/A <0.8 (Grade I DD), but with evidence of an elevated LVEDP. Such findings include alterations in PV flow, mitral PW inflow response to Valsalva maneuver, and also the presence of a B-bump on the mitral M-mode tracing...
July 23, 2017: Echocardiography
https://www.readbyqxmd.com/read/28728613/echocardiographic-parameters-of-clinically-normal-geriatric-rhesus-macaques-macacamulatta
#4
Yu Ueda, Catherine T Gunther-Harrington, Christina L Cruzen, Jeffrey A Roberts, Joshua A Stern
The goal of this study was to generate reference intervals for echocardiographic variables in a population of clinically normal geriatric rhesus macaques (Macaca mulatta). To do this, we studied 51 animals (age, 18-29 y; weight, 5.24-17.04 kg). The normal values for cardiac indices, including geometry and systolic and diastolic function, were determined by 2D, M-mode, spectral Doppler, and tissue Doppler echocardiography under ketamine hydrochloride sedation. Statistical correlations between the echocardiographic parameters and age, body weight, sex, and heart rate were investigated...
July 1, 2017: Journal of the American Association for Laboratory Animal Science: JAALAS
https://www.readbyqxmd.com/read/28724484/echocardiographic-parameters-of-clinically-normal-geriatric-rhesus-macaques-macacamulatta
#5
Yu Ueda, Catherine T Gunther-Harrington, Christina L Cruzen, Jeffrey A Roberts, Joshua A Stern
The goal of this study was to generate reference intervals for echocardiographic variables in a population of clinically normal geriatric rhesus macaques (Macaca mulatta). To do this, we studied 51 animals (age, 18-29 y; weight, 5.24-17.04 kg). The normal values for cardiac indices, including geometry and systolic and diastolic function, were determined by 2D, M-mode, spectral Doppler, and tissue Doppler echocardiography under ketamine hydrochloride sedation. Statistical correlations between the echocardiographic parameters and age, body weight, sex, and heart rate were investigated...
July 1, 2017: Journal of the American Association for Laboratory Animal Science: JAALAS
https://www.readbyqxmd.com/read/28713836/increased-serum-uric-acid-level-is-a-risk-factor-for-left-ventricular-hypertrophy-but-not-independent-of-egfr-in-patients-with-type-2-diabetic-kidney-disease
#6
Chuchu Zeng, Dongsheng Cheng, Xiaohua Sheng, Guihua Jian, Ying Fan, Yuqiang Chen, Junhui Li, Hongda Bao, Niansong Wang
BACKGROUND: Although the relation between serum uric acid (SUA) and left ventricular hypertrophy (LVH) has been studied for decades, however, their association remains debatable. METHODS: This is a retrospective study in which a total of 435 hospitalized Chinese patients with type 2 DKD were enrolled. The subjects were stratified into quartiles according to SUA level. LVH was assessed by two-dimensional guided M-mode echocardiography. RESULTS: There was a significant increase in the prevalence of LVH in patients with type 2 DKD across SUA quartiles (28...
2017: Journal of Diabetes Research
https://www.readbyqxmd.com/read/28711335/echocardiographic-reference-ranges-in-older-children-and-adolescents-in-sub-saharan-africa
#7
Edith D Majonga, Andrea M Rehman, Grace McHugh, Hilda A Mujuru, Kusum Nathoo, Mohammad S Patel, Shungu Munyati, Jon O Odland, Katharina Kranzer, Juan P Kaski, Rashida A Ferrand
BACKGROUND: Echocardiographic reference ranges are important to identify abnormalities of cardiac dimensions. Reference ranges for children in sub-Saharan Africa have not been established. The aim of this study was to establish echocardiographic z-score references for Black children in sub-Saharan Africa. METHODS: 282 healthy subjects aged 6-16years (143 [51%] males) with no known history of cardiac disease were enrolled in the study in Harare, Zimbabwe between 2014 and 2016...
June 30, 2017: International Journal of Cardiology
https://www.readbyqxmd.com/read/28709287/mode-locking-behavior-of-izhikevich-neurons-under-periodic-external-forcing
#8
AmirAli Farokhniaee, Edward W Large
Many neurons in the auditory system of the brain must encode periodic signals. These neurons under periodic stimulation display rich dynamical states including mode locking and chaotic responses. Periodic stimuli such as sinusoidal waves and amplitude modulated sounds can lead to various forms of n:m mode-locked states, in which a neuron fires n action potentials per m cycles of the stimulus. Here, we study mode-locking in the Izhikevich neurons, a reduced model of the Hodgkin-Huxley neurons. The Izhikevich model is much simpler in terms of the dimension of the coupled nonlinear differential equations compared with other existing models, but excellent for generating the complex spiking patterns observed in real neurons...
June 2017: Physical Review. E
https://www.readbyqxmd.com/read/28707910/amplitude-sensing-below-the-zero-point-fluctuations-with-a-two-dimensional-trapped-ion-mechanical-oscillator
#9
K A Gilmore, J G Bohnet, B C Sawyer, J W Britton, J J Bollinger
We present a technique to measure the amplitude of a center-of-mass (c.m.) motion of a two-dimensional ion crystal of ∼100 ions. By sensing motion at frequencies far from the c.m. resonance frequency, we experimentally determine the technique's measurement imprecision. We resolve amplitudes as small as 50 pm, 40 times smaller than the c.m. mode zero-point fluctuations. The technique employs a spin-dependent, optical-dipole force to couple the mechanical oscillation to the electron spins of the trapped ions, enabling a measurement of one quadrature of the c...
June 30, 2017: Physical Review Letters
https://www.readbyqxmd.com/read/28704174/evaluation-of-pulmonary-artery-pressure-in-patients-with-juvenile-systemic-lupus-erythematosus-sle
#10
Amra Adrovic, Reyhan Dedeoglu, Sezgin Sahin, Kenan Barut, Aida Koka, Dicle Cengiz, Funda Oztunc, Ozgur Kasapcopur
Juvenile systemic lupus erythematosus (jSLE) is a chronic multisystemic autoimmune disease. Previous studies among adults have shown impaired right ventricular (RV) function in patients with SLE. Also, these patients may develop pulmonary artery hypertension (PAH), which is one of the most threatening complications of SLE. Nevertheless, studies on PAH among jSLE patients are still rare. The aim of this study was to assess the RV function in jSLE patients by Doppler echocardiography (Echo Doppler). We also estimated pulmonary artery systolic pressure (PASP) and mean pulmonary artery pressure (MPAP) in these patients...
July 13, 2017: Bosnian Journal of Basic Medical Sciences
https://www.readbyqxmd.com/read/28700119/k-distribution-three-dimensional-mapping-of-biological-tissues-in-optical-coherence-tomography
#11
Mitsuro Sugita, Robert A Brown, Ivan Popov, Alex Vitkin
Probability density function (PDF) analysis with K-distribution model of optical coherence tomography (OCT) intensity signals has previously yielded a good representation of the average number of scatterers in a coherence volume for microspheres-in-water systems, and has shown initial promise for biological tissue characterization. In this work, we extend these previous findings, based on single point M-mode or 2D slice analysis, to full 3D imaging maps of the shape parameter α of the K-distribution PDF. After selecting a suitably-sized 3D evaluation window, and verifying methodology in phantoms the resultant parametric α images obtained in different animal tissues (rat liver and brain) show new contrasting ability not seen in conventional OCT intensity images...
July 12, 2017: Journal of Biophotonics
https://www.readbyqxmd.com/read/28683514/endocardial-fibroelastosis-of-the-left-ventricle-affects-right-ventricular-performance-in-fetuses-with-hypoplastic-left-heart-syndrome-a-prospective-study-using-m-mode-pw-and-tissue-doppler-techniques
#12
Oliver Graupner, Christian Enzensberger, Larissa Wieg, Jan Degenhardt, Aline Wolter, Markus Khalil, Dietmar Schranz, Can Yerebakan, Astrid Doelle, Johannes Herrmann, Roland Axt-Fliedner
Purpose Myocardial function (MF) of the systemic right ventricle (RV) influences the postnatal course of neonates with hypoplastic left heart syndrome (HLHS). Our study examines whether the presence of endocardial fibroelastosis of the left ventricle (LV EFE) influences MF of the RV in HLHS fetuses. Materials and Methods A prospective study was conducted including 10 controls (group 1), 10 HLHS fetuses with (group 2) and 10 without LV EFE (group 3) - all matched for gestational age. M-mode was used to assess tricuspid plane systolic excursion (TAPSE) and the shortening fraction (SF)...
July 6, 2017: Ultraschall in der Medizin
https://www.readbyqxmd.com/read/28682423/assessments-of-m-mode-color-echocardiography-on-fetal-right-ventricular-diastolic-function-with-umbilical-cord-around-neck
#13
W Shi, H-X Liu, Z-D Xuan, L Zhao, J-Z Li, Y-H Wang
OBJECTIVE: To investigate the fetal right ventricular diastolic function under the condition of umbilical cord around neck (UCAN), and analyze the changes of the right ventricular propagation velocity (Vp), then discuss the clinical value of the color M-mode echocardiography in the evaluation of fetal ventricular diastolic function quantitatively. PATIENTS AND METHODS: All patients enrolled were with singleton pregnancy from Cangzhou Central Hospital from December 2013 to December 2015 as the experimental group...
June 2017: European Review for Medical and Pharmacological Sciences
https://www.readbyqxmd.com/read/28663927/detection-of-local-tissue-alteration-during-retinal-laser-photocoagulation-of-ex-vivo-porcine-eyes-using-phase-resolved-optical-coherence-tomography
#14
Shuichi Makita, Yoshiaki Yasuno
Retinal laser photocoagulation is used to treat several ophthalmic diseases. However, it is associated with damage to surrounding healthy tissue. Local tissue alteration during coagulation laser illumination was measured using phase-resolved optical coherence tomography (OCT) M-mode scan as a change in the local optical path length (LOPL). A metric that represents global net tissue alteration was defined using the LOPL change. The visibility of a laser lesion was assessed by three-dimensional OCT volume measurement...
June 1, 2017: Biomedical Optics Express
https://www.readbyqxmd.com/read/28662937/a-history-of-asthma-from-childhood-and%C3%A2-left-ventricular-mass-in-asymptomatic%C3%A2-young-adults-the-bogalusa-heart-study
#15
Dianjianyi Sun, Tiange Wang, Yoriko Heianza, Jun Lv, Liyuan Han, Felicia Rabito, Tanika Kelly, Shengxu Li, Jiang He, Lydia Bazzano, Wei Chen, Lu Qi
OBJECTIVES: This study aimed to examine whether a history of asthma from childhood is associated with left ventricular (LV) mass in adulthood. BACKGROUND: Asthma has been related to various cardiovascular risk factors affecting LV hypertrophy. The authors saw a need for a prospective study to analyze the relationship between a history of asthma from childhood and markers of LV mass among asymptomatic young adults. METHODS: Prospective analyses were performed among 1,118 Bogalusa Heart Study participants (average age at follow-up 36...
July 2017: JACC. Heart Failure
https://www.readbyqxmd.com/read/28652671/aortic-velocity-propagation-a-novel-echocardiographic-method-in-predicting-atherosclerotic-coronary-artery-disease-burden
#16
Pakala Vasudeva Chetty, Durgaprasad Rajasekhar, Velam Vanajakshamma, Kummaraganti P Ranganayakulu, Dommara Kranthi Chaithanya
BACKGROUND: The major burden of cardiovascular disease mortality around the globe is due to atherosclerosis and its complications. Hence its early detection and management with easily accessible and noninvasive methods are valuable. Aortic velocity propagation (AVP) through color M-mode of the proximal descending aorta determines aortic stiffness, reflecting atherosclerosis. The aim of this study was to find the utility of AVP in predicting coronary artery disease (CAD) burden assessed through SYNTAX (SYNergy between percutaneous coronary intervention with TAXus and cardiac surgery) score and compared with carotid intima-media thickness (CIMT), which is an established surrogate marker of atherosclerosis...
July 2017: Journal of the Saudi Heart Association
https://www.readbyqxmd.com/read/28634695/assessment-of-early-diastolic-intraventricular-pressure-gradient-in-the-left-ventricle-among-patients-with-repaired-tetralogy-of-fallot
#17
Maki Kobayashi, Ken Takahashi, Mariko Yamada, Kana Yazaki, Kotoko Matsui, Noboru Tanaka, Sachie Shigemitsu, Katsumi Akimoto, Masahiko Kishiro, Keisuke Nakanishi, Shiori Kawasaki, Masaki Nii, Keiichi Itatani, Toshiaki Shimizu
Assessment of left ventricular (LV) dysfunction is vital in patients with repaired tetralogy of Fallot (rTOF). The early diastolic intraventricular pressure gradient (IVPG) in the LV plays an important role in diastolic function. IVPG is calculated as the intraventricular pressure difference divided by the LV length, which allows to account for differences in LV size and therefore calculate IVPG in children. We aimed to investigate the mechanisms of LV diastolic dysfunction by measuring mid-to-apical IVPG as an indicator of the active suction force sucking blood from the left atrium into the LV...
June 20, 2017: Heart and Vessels
https://www.readbyqxmd.com/read/28623658/echocardiographic-parameters-of-clinically-normal-geriatric-rhesus-macaques-macaca-mulatta
#18
Yu Ueda, Catherine T Gunther-Harrington, Christina L Cruzen, Jeffrey A Roberts, Joshua A Stern
The goal of this study was to generate reference intervals for echocardiographic variables in a population of clinically normalgeriatric rhesus macaques (Macaca mulatta). To do this, we studied 51 animals (age, 18-29 y; weight, 5.24-17.04 kg). Thenormal values for cardiac indices, including geometry and systolic and diastolic function, were determined by 2D, M-mode,spectral Doppler, and tissue Doppler echocardiography under ketamine hydrochloride sedation. Statistical correlations betweenthe echocardiographic parameters and age, body weight, sex, and heart rate were investigated...
June 16, 2017: Journal of the American Association for Laboratory Animal Science: JAALAS
https://www.readbyqxmd.com/read/28613097/dynamic-muscle-ultrasound-identifies-upper-motor-neuron-involvement-in-amyotrophic-lateral-sclerosis
#19
Yu-Ichi Noto, Neil Simon, Kazumoto Shibuya, José M Matamala, Thanuja Dharmadasa, Matthew C Kiernan
OBJECTIVE: The aim of the present study was to elucidate the pattern of change in bulbar muscles using ultrasound in patients diagnosed with amyotrophic lateral sclerosis (ALS). METHODS: Changes in the mylohyoid and geniohyoid muscle complex (mylohyoid-geniohyoid-muscle-complex) thickness were recorded while swallowing 5 ml of water using M-mode ultrasound in 30 ALS patients compared to 20 healthy controls. The ratio of mylohyoid-geniohyoid-muscle-complex thickness as determined by the maximum thickness of mylohyoid-geniohyoid-muscle-complex during swallowing divided by thickness at rest, was compared between ALS patients and controls, with the correlation between thickness ratio, echogenicity and clinical parameters assessed...
February 10, 2017: Amyotrophic Lateral Sclerosis and Frontotemporal Degeneration
https://www.readbyqxmd.com/read/28599830/normative-left-ventricular-m-mode-echocardiographic-values-in-preterm-infants-up-to-2-kg
#20
Swati Choudhry, Amber Salter, Tyler W Cunningham, Philip T Levy, Hoang H Nguyen, Michael Wallendorf, Gautam K Singh, Mark C Johnson
BACKGROUND: There is a paucity of normative echocardiographic data in preterm infants. The objectives of this study were to (1) derive left ventricular (LV) M-mode reference values and (2) compare the performance of alternative methods of indexing LV dimensions and LV mass (LVM) in preterm infants. The authors propose that indexing LV measures to weight in preterm infants is a practical approach given the variability associated with tape-measure length measurement in infants. METHODS: In this retrospective study, LV M-mode echocardiographic measurements of end-diastolic interventricular septal thickness, end-diastolic LV posterior wall thickness, LV end-diastolic and end-systolic dimensions, LVM, and relative wall thickness were remeasured in 503 hospitalized preterm infants ≤2 kg (372 from a retrospective sample and 131 prospectively enrolled)...
June 6, 2017: Journal of the American Society of Echocardiography
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