Search | SciELO

Need help?

Add field +

Search history

No documents were found for your search

Results: 10

au:LEITE, MARINA M.

Filters

Collection

All
Brazil

10

Journal + Options

All
Anais da Academia Brasileira de Ciências

2
Arquivos Brasileiros de Cardiologia

1
Brazilian Journal of Anesthesiology

1
Brazilian Journal of Microbiology

1
Clinics

1
Journal of Applied Oral Science

1
Motriz: Revista de Educação Física

1
Polímeros

1
Revista Brasileira de Saúde Ocupacional

1

Language

All
Portuguese

3

Publication Year + Options

All
2017

2
2020

2
2005

1
2006

1
2010

1
2012

1
2021

1
2022

1

SciELO Thematic Areas + Options

All
Health Sciences

6
Multidisciplinary

2
Biological Sciences

1
Engineering

1

WoS Subject Categories + Options

All
Medicine

3
Sciences

3
General

2
Internal

2
Multidisciplinary

2
Anesthesiology

1
Cardiac

1
Cardiovascular

1
Dentistry

1
Environmental

1
Health

1
Microbiology

1
Occupational

1
Oral

1
Polymer

1

Show all...

WoS Citation Index + Options

All
Science Citation Index Expanded

7
Social Sciences Citation Index

2

Citables and non citables

All
Citable

10

Type of Literature

All
Article

10

Order by

Page of 1 Next

Select this page

Print | Send to email | Export |

Facebook
Twitter
Google+
LinkedIn
Reddit
StambleUpon
CiteULike
Mendeley
Other networks

0 Selected itens

List all
Erase all

Is Mallampati classification a good screening test? A prospective cohort evaluating the predictive values of Mallampati test at different thresholds
Facebook Twitter

Other social networks
Google+
LinkedIn
Reddit
StambleUpon
CiteULike
Mendeley
Other networks

Metrics
- SciELO Analytics
- Dimensions
- PlumX
- Altmetric

Carvalho, Clístenes C. de

; Silva, Danielle M. da

; Leite, Marina S.

; Orange, Flávia A. de

Brazilian Journal of Anesthesiology

Journal Metrics
- Sobre o periódico
- SciELO Analytics

dec 2022, Volume 72 N. 6 Pages 736 - 741

Abstract: En | Text: En | PDF: En

Abstract Background There is currently some discussion over the actual usefulness of performing preoperative upper airway assessment to predict difficult airways. In this field, modified Mallampati test (MMT) is a widespread tool used for prediction of difficult airways showing only a feeble predictive performance as a diagnostic test. We therefore aimed at evaluating if MMT test would perform better when used as a screening test rather than diagnostic. Methods An accuracy prospective study was conducted with 570 patients undergoing general anesthesia for surgical procedures. We collected preoperatively data on sex, age, weight, height, body mass index (BMI), ASA physical status, and MMT. The main outcome was difficult laryngoscopy defined as Cormack and Lahane classes 3 or 4. Bivariate analyses were performed to build three different predictive models with their ROC curves. Results Difficult laryngoscopy was reported in 36 patients (6.32%). Sex, ASA physical status, and MMT were associated with difficult laryngoscopy, while body mass index (BMI) was not. The MMT cut-off with the highest odds ratio was the class II, which also presented significantly higher sensitivity (94.44%). The balanced accuracy was 67.11% (95% CI: 62.78-71.44%) for the cut-off of class II and 71.68% (95% CI: 63.83-79.54) for the class III. Conclusion MMT seems to be more clinically useful when the class II is employed as the threshold for possible difficult laryngoscopies. At this cut-off, MMT shows the considerable highest sensitivity plus the highest odds ratio, prioritizing thus the anticipation of difficult laryngoscopies.

https://doi.org/10.1016/j.bjane.2021.09.008

COMVC-19: A Program to protect healthcare workers’ mental health during the COVID-19 Pandemic. What we have learned
Facebook Twitter

Other social networks
Google+
LinkedIn
Reddit
StambleUpon
CiteULike
Mendeley
Other networks

Metrics
- SciELO Analytics
- Dimensions
- PlumX
- Altmetric

Fukuti, Pedro

; Uchôa, Caroline Louise Mesquita

; Mazzoco, Marina Flaborea

; Cruz, Isabella D'Andrea Garcia da

; Echegaray, Mariana V.F.

; Humes, Eduardo de Castro

; Silveira, Júlia Belizário

; Santi, Talita Di

; Miguel, Euripedes Constantino

; Corchs, Felipe

; Fatori, Daniel

; Campello, Guilherme

; Oliveira, Gabriel M. de

; Argolo, Felipe C.

; Ferreira, Felipe de M.

; Machado, Gustavo

; Argeu, Adriana

; Oliveira, Graça Maria Ramos de

; Serafim, Antônio de Pádua

; Siqueira, Luciana de Lima

; Rossi, Luciane de

; Rios, Izabel Cristina

; Oliveira, Talita Rodrigues de

; Antoniazzi, Leilane C. K.

; Gagliotti, Daniel Augusto Mori

; Abelama Neto, Emílio

; Oliveira Junior, Paulo Novais de

; Correia, Aline Villalobo

; Gonçalves, Luca Schilling

; Tortato, Liana Silva

; Busato, Wagner Machado Moraes

; Guimarães-Fernandes, Flávio

; Alves, Marcos

; Leite Netto, Oswaldo Ferreira

; Schoueri, Patrícia de Campos Lindenberg

; Roque, Márcio de Assis

; Merlin, Silvia Stahl

; Boer, Giovana Cardoso Machado

; Sallet, Paulo Clemente

; Malbergier, André

; Spedo, Mariana Abrahão

; Kamitsuji, Carla Satie

; Faria, Elizabeth de

; Moreira, Moacyr Vergara de Godoy

; Kaufman, Arthur

; Abdo, Carmita

; Scanavino, Marco de Tubino

; Lancman, Selma

; Tavares, Hermano

; Polanczyk, Guilherme

; Brunoni, André R.

; Forlenza, Orestes V.

; Barros-Filho, Tarcísio Eloy Pessoa de

Clinics

Journal Metrics
- Sobre o periódico
- SciELO Analytics

2021, Volume 76 elocation e2631

Abstract: En | Text: En | PDF: En

OBJECTIVE: In 2020, the COVID-19 pandemic brought a work and stress overload to healthcare workers, increasing their vulnerability to mental health impairments. In response, the authors created the COMVC-19 program. The program offered preventive actions and mental health treatment for the 22,000 workers of The Hospital das Clinicas da Faculdade de Medicina da Universidade de São Paulo (HCFMUSP). This paper aims to describe its implementation and share what we have learned from this experience. METHODS: Workers were able to easily access the program through a 24/7 hotline. Additionally, a mobile phone app that screened for signs and symptoms of emotional distress and offered psychoeducation and/or referral to treatment was made available. Data from both these sources as well as any subsequent psychiatric evaluations were collected. RESULTS: The first 20 weeks of our project revealed that most participants were female, and part of the nursing staff working directly with COVID-19 patients. The most frequently reported symptoms were: anxiety, depression and sleep disturbances. The most common diagnoses were Adjustment, Anxiety, and Mood disorders. CONCLUSIONS: Implementing a mental health program in a multimodal intervention was feasible in a major quaternary public hospital. Our data also suggests that preventive actions should primarily be aimed at anxiety and depression symptoms, with a particular focus on the nursing staff.

https://doi.org/10.6061/clinics/2021/e2631

An Overview on the Development of Electrochemical Capacitors and Batteries – Part I
Facebook Twitter

Other social networks
Google+
LinkedIn
Reddit
StambleUpon
CiteULike
Mendeley
Other networks

Metrics
- SciELO Analytics
- Dimensions
- PlumX
- Altmetric

MARTINS, VITOR L.

; NEVES, HERBERT R.

; MONJE, IVONNE E.

; LEITE, MARINA M.

; OLIVEIRA, PAULO F.M. DE

; ANTONIASSI, RODOLFO M.

; CHAUQUE, SUSANA

; MORAIS, WILLIAM G.

; MELO, EDUARDO C.

; OBANA, THIAGO T.

; SOUZA, BRENO L.

; TORRESI, ROBERTO M.

Anais da Academia Brasileira de Ciências

Journal Metrics
- Sobre o periódico
- SciELO Analytics

2020, Volume 92 N. 2 elocation e20200796

Abstract: En | Text: En | PDF: En

Abstract The Nobel Prize in Chemistry 2019 recognized the importance of Li-ion batteries and the revolution they allowed to happen during the past three decades. They are part of a broader class of electrochemical energy storage devices, which are employed where electrical energy is needed on demand and so, the electrochemical energy is converted into electrical energy as required by the application. This opens a variety of possibilities on the utilization of energy storage devices, beyond the well-known mobile applications, assisting on the decarbonization of energy production and distribution. In this series of reviews in two parts, two main types of energy storage devices will be explored: electrochemical capacitors (part I) and rechargeable batteries (part II). More specifically, we will discuss about the materials used in each type of device, their main role in the energy storage process, their advantages and drawbacks and, especially, strategies to improve their performance. In the present part, electrochemical capacitors will be addressed. Their fundamental difference to batteries is explained considering the process at the electrode/electrolyte surface and the impact in performance. Materials used in electrochemical capacitors, including double layer capacitors and pseudocapacitive materials will be reviewed, highlighting the importance of electrolytes. As an important part of these strategies, synthetic routes for the production of nanoparticles will also be approached (part I).

https://doi.org/10.1590/0001-3765202020200796 1490 downloads

An Overview on the Development of Electrochemical Capacitors and Batteries – part II
Facebook Twitter

Other social networks
Google+
LinkedIn
Reddit
StambleUpon
CiteULike
Mendeley
Other networks

Metrics
- SciELO Analytics
- Dimensions
- PlumX
- Altmetric

MARTINS, VITOR L.

; NEVES, HERBERT R.

; MONJE, IVONNE E.

; LEITE, MARINA M.

; OLIVEIRA, PAULO F.M. DE

; ANTONIASSI, RODOLFO M.

; CHAUQUE, SUSANA

; MORAIS, WILLIAM G.

; MELO, EDUARDO C.

; OBANA, THIAGO T.

; SOUZA, BRENO L.

; TORRESI, ROBERTO M.

Anais da Academia Brasileira de Ciências

Journal Metrics
- Sobre o periódico
- SciELO Analytics

2020, Volume 92 N. 2 elocation e20200800

Abstract: En | Text: En | PDF: En

Abstract In the second part of the review on electrochemical energy storage, the devolvement of batteries is explored. First, fundamental aspects of battery operation will be given, then, different materials and chemistry of rechargeable batteries will be explored, including each component of the cell. In negative electrodes, metallic, intercalation and transformation materials will be addressed. Examples are Li or Na metal batteries, graphite and other carbonaceous materials (such as graphene) for intercalation of metal-ions and transition metal oxides and silicon for transformation. In the positive electrode section, materials for intercalation and transformation will be reviewed. The state-of-the-art on intercalation as lithium cobalt oxide and nickel containing oxides will be approached for intercalation materials, whereas sulfur and metal-air will also be explored for transformation. Alongside, the role of electrolyte will be discussed concerning performance and safety, with examples for the next generation devices. Finally, a general future perspective will address both electrochemical capacitors and batteries.

https://doi.org/10.1590/0001-3765202020200800 1498 downloads

Comparative study of Mycobacterium bovis primary isolation methods
Facebook Twitter

Other social networks
Google+
LinkedIn
Reddit
StambleUpon
CiteULike
Mendeley
Other networks

Metrics
- SciELO Analytics
- Dimensions
- PlumX
- Altmetric

Issa, Marina de Azevedo

; Soares Filho, Paulo Martins

; Fonseca Júnior, Antônio Augusto

; Hodon, Mikael Arrais

; Santos, Lílian Cristian dos

; Reis, Jenner Karlisson Pimenta dos

; Cerqueira Leite, Rômulo

Brazilian Journal of Microbiology

Journal Metrics
- Sobre o periódico
- SciELO Analytics

mar 2017, Volume 48 N. 1 Pages 139 - 144

Abstract: En | Text: En | PDF: En

Abstract For the definitive diagnosis of bovine tuberculosis, isolation of the etiologic agent is required. However, there is no consensus on the best methodology for isolation of Mycobacterium bovis in Brazil. This study evaluated the most used decontaminants and culture media in the country, in order to identify the best combination for the Brazilian samples. Three decontaminants - 2% sodium hydroxide (w/v), 0.75% hexadecylpiridinium chloride (w/v) and 5% sulphuric acid (v/v) and four culture media - 7H11 Middlebrook with additives and OADC supplement “A” (7H11 A), the same media with another supplement trademark (7H11 B), tuberculosis blood agar (B83) and Stonebrink's medium were compared. Regarding the isolation, there were no significant differences between the decontaminants and media combinations, except 7H11A combined to any decontaminant. However, the mean colonies score was significantly greater when the samples were decontaminated with 5% sulphuric acid and inoculated in 7H11 B or SB, without significant difference between them, although colonies appeared earlier on 7H11B than on SB. The trademark of OADC supplement influenced the isolation rate and the number of isolated colonies in Middlebrook 7H11. An incubation time of four weeks was required to detect all positive samples in 7H11 B after decontamination with 5% sulphuric acid but there was an increase in the number of colonies until the sixth week of incubation. Overall, the best strategy for the primary isolation of M. bovis from Brazilian samples was the decontamination with 5% sulphuric acid (final concentration) and inoculation in Middlebrook 7H11 medium formulated with OADC supplement “B”.

https://doi.org/10.1016/j.bjm.2016.07.026 1002 downloads

Resistance training and hormone replacement increase MMP-2 activity, quality and quantity of bone in ovariectomized rats
Facebook Twitter

Other social networks
Google+
LinkedIn
Reddit
StambleUpon
CiteULike
Mendeley
Other networks

Metrics
- SciELO Analytics
- Dimensions
- PlumX
- Altmetric

Souza, Markus V.C

; Lino, Anderson D. S

; Ruffoni, Leandro G. D

; Domingos, Mateus M.

; Barbosa, Marina R.

; Rodrigues, Maria F C.

; Ferreira, Fabiano C.

; Tomaz, Luciane M.

; Canevazzi, Gustavo H. R.

; Silva, Natália S.

; Teixeira, Jeferson A. A.

; Leite, Richard D.

; Shiguemoto, Gilberto E.

; Perez, Sérgio E. A.

Motriz: Revista de Educação Física

Journal Metrics
- Sobre o periódico
- SciELO Analytics

2017, Volume 23 N. 4 elocation e1017107

Abstract: En | Text: En | PDF: En

Abstract AIMS The aim of the present study was to investigate the influence of resistance training (RT) and hormone replacement (HR) on MMP-2 activity, biomechanical and physical properties bone of ovariectomized (OVX) rats. METHODS Sprague-Dawley female rats were grouped into six experimental groups (n = 11 per group): sham-operated sedentary (SHAM Sed), ovariectomized sedentary (OVX Sed), sham-operated resistance training (SHAM RT), ovariectomized resistance training (OVX RT), ovariectomized sedentary hormone replacement (OVX Sed-HR), and ovariectomized resistance training hormone replacement (OVX RT-HR). HR groups received implanted silastic capsules with a 5% solution of 17β-estradiol (50 mg 17β-estradiol/ml of sunflower oil). In a 12-week RT period (27 sessions; 4-9 climbs) the animals climbed a 1.1 m vertical ladder with weights attached to their tails. Biomechanical and physical bone analyses were performed using a universal testing machine, and MMP-2 activity analysis was done by zymography. RESULTS Bone density and bone mineral content was higher in the RT and HR groups. The MMP-2 activity was higher in the RT and HR groups. The biomechanical analysis (stiffness, fracture load and maximum load) demonstrated better bone tissue quality in the RT associated with HR. CONCLUSION The RT alone as well as when it is associated with HR was efficient in increasing MMP-2 activity, biomechanical and biophysical properties bone of ovariectomized rats.

https://doi.org/10.1590/s1980-6574201700040003 751 downloads

Mapeamento de vulnerabilidades socioambientais e de contextos de promoção da saúde ambiental na comunidade rural do Lamarão, Distrito Federal, 2011
Facebook Twitter

Other social networks
Google+
LinkedIn
Reddit
StambleUpon
CiteULike
Mendeley
Other networks

Metrics
- SciELO Analytics

Carneiro, Fernando Ferreira

; Hoefel, Maria da Graça

; Silva, Marina Aparecida Malheiros

; Nepomuceno, Alcebíades Renato

; Vilela, Cleidiane

; Amaral, Fernanda Rocha

; Carvalho, Graciele Pollyanna M.

; Batista, Jaqueline Leite

; Lopes, Patrícia Abreu

Revista Brasileira de Saúde Ocupacional

Journal Metrics
- Sobre o periódico
- SciELO Analytics

jun 2012, Volume 37 N. 125 Pages 143 - 148

Abstract: Pt En | Text: Pt En | PDF: Pt | PDF: En

OBJETIVO: realizar atividade de ensino e extensão com alunos de graduação para construção de diagnóstico participativo sobre as condições de vida, ambiente e trabalho em núcleo populacional rural, visando subsidiar ações de promoção da saúde pela equipe de agentes comunitários da Estratégia Saúde da Família. MÉTODOS: trabalho realizado no Núcleo Rural do Lamarão, no Distrito Federal, de outubro/2010 a janeiro/2011. Alunos, conjuntamente com agentes comunitários de saúde, por meio de entrevistas, visitas e oficinas, aplicaram instrumentos de Estimativa Participativa Rápida e de construção de mapa de vulnerabilidade socioambiental e de contextos de promoção da saúde ambiental. RESULTADOS: identificaram-se como promotores da vida na comunidade: diversidade de produção de alimentos, liberdade e segurança, união e organização da comunidade, geração de empregos e natureza. Foram considerados ameaçadores à vida: cultura alimentar, uso inadequado de agrotóxicos, uso incorreto de equipamentos de proteção individual, pulverização aérea, falta de lazer, falta de transporte, uso de drogas lícitas e ilícitas. CONCLUSÃO: a partir do diagnóstico, será construído um projeto de intervenção participativo que incorporará características de ensino, pesquisa e extensão na relação Saúde, Trabalho, Ambiente e Nutrição.

OBJECTIVE: To involve undergraduate students in an extension activity aimed at conducting a participatory diagnosis on life, environment, and work conditions in a rural settlement, with the purpose of raising goals for future health promotion actions performed by community health agents of the Family Health Strategy. METHODS: The study was held between October 2010 and January 2011 in the rural community of Lamarão, located in the Federal District in Brazil. By means of interviews, visits, and workshops, students and community health agents used Participatory Rapid Appraisal instruments as well as tools for mapping socio-environmental vulnerability and health promotion related issues. RESULTS: The following were identified as life promotion factors in the community: food production diversity, freedom and safety, unity and community organization, job generation, and nature. Considered as threatening to life were: food culture, improper use of pesticides, inadequate use of personal protective equipment, aerial spraying, lack of leisure, lack of transportation, use of licit and illicit drugs. CONCLUSION: A participatory intervention project will be developed, which will incorporate teaching, research and extension activities regarding Health, Work, Environment, and Nutrition.

6750 downloads Cited 4 times in SciELO

Effect of ageing and immersion in different beverages on properties of denture lining materials
Facebook Twitter

Other social networks
Google+
LinkedIn
Reddit
StambleUpon
CiteULike
Mendeley
Other networks

Metrics
- SciELO Analytics

Leite, Vanessa M. F.

; Pisani, Marina X.

; Paranhos, Helena F. O.

; Souza, Raphael F.

; Silva-Lovato, Cláudia H.

Journal of Applied Oral Science

Journal Metrics
- Sobre o periódico
- SciELO Analytics

aug 2010, Volume 18 N. 4 Pages 372 - 378

Abstract: En | Text: En | PDF: En

OBJECTIVES: To evaluate the color stability and hardness of two denture liners obtained by direct and indirect techniques, after thermal cycling and immersion in beverages that can cause staining of teeth. MATERIAL AND METHODS: Seventy disc-shaped specimens (18 x 3 mm) processed by direct (DT) and indirect techniques (IT) were made from Elite soft (n=35) and Kooliner (n=35) denture liners. For each material and technique, 10 specimens were subjected to thermal cycling (3,000 cycles) and 25 specimens were stored in water, coffee, tea, soda and red wine for 36 days. The values of color change, Shore A hardness (Elite soft) and Knoop hardness (Kooliner) were obtained. The data were subjected to ANOVA, Tukey's multiple-comparison test, and Kruskal-Wallis test (P<0.05). RESULTS: The thermal cycling promoted a decrease on hardness of Kooliner regardless of the technique used (Initial: 9.09± 1.61; Thermal cycling: 7.77± 1.47) and promoted an increase in the hardness in the DT for Elite Soft (Initial: 40.63± 1.07; Thermal cycling: 43.53± 1.03); hardness of Kooliner (DT: 8.76± 0.95; IT: 7.70± 1.62) and Elite Soft (DT: 42.75± 1.54; IT=39.30± 2.31) from the DT suffered an increase after the immersion in the beverages. The thermal cycling promoted color change only for Kooliner in the IT. Immersion in the beverages did not promote color change for Elite in both techniques. The control group of the DT of Kooliner showed a significant color change. Wine and coffee produced the greatest color change in the DT only for Elite Soft when compared to the other beverages. CONCLUSION: The three variation factors promoted alteration on hardness and color of the tested denture lining materials.

4100 downloads

Caracterização mecânica e morfológica de compósitos de polipropileno e fibras de coco verde: influência do teor de fibra e das condições de mistura
Facebook Twitter

Other social networks
Google+
LinkedIn
Reddit
StambleUpon
CiteULike
Mendeley
Other networks

Metrics
- SciELO Analytics

Ishizaki, Marina H.

; Visconte, Leila L. Y.

; Furtado, Cristina R. G.

; Leite, Márcia C. A. M.

; Leblanc, Jean L.

Polímeros

Journal Metrics
- Sobre o periódico
- SciELO Analytics

2006, Volume 16 N. 3 Pages 182 - 186

Abstract: Pt En | Text: Pt En | PDF: Pt | PDF: En

Compósitos de polipropileno com 10, 20 e 30% em volume de fibra de coco verde foram obtidos em câmara de mistura Haake, tendo como variáveis a temperatura de processamento e a velocidade de cisalhamento. O módulo de flexão e as características morfológicas dos diferentes compósitos obtidos foram avaliados e comparados com o polipropileno puro. Foi observado que a temperatura de 170 °C, a velocidade do rotor de 60rpm e o teor de fibra de coco verde de 30% forneceram o melhor desempenho quanto à flexão. Essas observações foram comprovadas pela análise da morfologia.

Polypropylene composites containing 10, 20 and 30% in volume of green coconut fiber were prepared in a Haake chamber at various processing temperatures and shear rates. The flexural modulus and morphological characteristics of the composites were evaluated and compared with pure polypropylene. Optimization experiments indicated that a temperature of 170 °C, shear rate of 60rpm and green coconut fiber content of 30% showed the best properties by flexural modulus. These observations were confirmed by a morphology analysis.

9386 downloads

10.

A administração precoce de hormônio de crescimento resulta em efeitos deletérios na remodelação ventricular após o infarto agudo do miocárdio
Facebook Twitter

Other social networks
Google+
LinkedIn
Reddit
StambleUpon
CiteULike
Mendeley
Other networks

Metrics
- SciELO Analytics

Mill, José G.

; Zornoff, Leonardo A. M.

; Okoshi, Marina P.

; Okoshi, Katashi

; Padovani, Carlos R.

; Sugisaki, Mário

; Leite, Cláudia M.

; Cicogna, Antônio C.

Arquivos Brasileiros de Cardiologia

Journal Metrics
- Sobre o periódico
- SciELO Analytics

feb 2005, Volume 84 N. 2 Pages 115 - 121

Abstract: Pt En | Text: Pt En | PDF: Pt | PDF: En

OBJETIVO: Verificar a ação do hormônio de crescimento (GH) sobre a remodelação miocárdica em ratos infartados. MÉTODOS: Ratos Wistar foram submetidos ao infarto e tratados com GH (IAM-GH; n=8), ou com o veículo (IAM; n=8). Ratos controles foram submetidos ao infarto simulado (C; n=8). Após 30 dias, os animais foram submetidos ao estudo funcional por meio de ecocardiograma e as alterações da contratilidade miocárdica estudadas no músculo papilar isolado do ventrículo esquerdo (VE). RESULTADOS: O ecocardiograma identificou aumento nos diâmetros (mm) diastólico (C=7,32±0,49; IAM=8,50±0,73; IAM-GH= 9,34± 0,73; P<0,05) e sistólico (C=3,38±0,47, IAM= 5,16±1,24; IAM-GH=5,96±1,54; P<0,05) no VE dos animais com infarto. Os animais do grupo IAM-GH apresentaram menor fração (%) de ejeção (C=0,9±0,03; IAM=0,76±0,12; IAM-GH=0,72±0,14; P<0,05 para C vs IAM-GH) em relação aos controles. O estudo do músculo papilar isolado do ventrículo esquerdo mostrou que o grupo IAM-GH apresentou alterações (C=1,50±0,59; IAM= 1,28±0,38; IAM-GH=1,98±0,41; P<0,05 para C vs IAM-GH) somente na tensão de repouso (TR - g/mm²) e no delta do tempo para a tensão desenvolvida decrescer 50% (TR50, ms) após estimulação com cálcio (C=23,75±9,16; IAM=-16,56±14,82; IAM-GH=-4,69±8,39; P<0,05 para C vs IAM-GH) e no delta da tensão desenvolvida (TD, g/mm²) após estimulação com isoproterenol (C=0,99±0,17; IAM=0,54±0,62; IAM-GH= 0,08±0,75; P<0,05 para C vs IAM-GH), em relação aos animais controle. CONCLUSÃO: A administração precoce do GH no modelo de infarto experimental em ratos pode resultar em efeitos adversos no processo de remodelação ventricular.

OBJECTIVE: To assess the effect of growth hormone (GH) on myocardial remodeling in infarcted rats. METHODS: This study comprised 24 Wistar rats divided into 3 groups as follows: 1) AMI-GH group - comprising 8 rats that underwent infarction and were treated with GH; 2) AMI group - comprising 8 rats that underwent infarction and received only the diluent of the GH solution; and 3) control group (C group) - comprising 8 rats that underwent simulated infarction. After 30 days, the animals underwent functional study through echocardiography, and the changes in myocardial contractility of the isolated left ventricular (LV) papillary muscle were studied. RESULTS:The echocardiography identified an increase in the diastolic (C=7.32±0.49; AMI=8.50±0.73; AMI-GH=9.34±0.73; P<0.05) and systolic (C=3.38±0.47, AMI=5.16±1.24; AMI-GH=5.96±1.54; P<0.05) diameters (mm) in the LV of the infarcted animals. The AMI-GH group animals had a lower ejection fraction (%) (C=0.9±0.03; AMI=0.76±0.12; AMI-GH= 0.72± 0.14; P<0.05 for C vs AMI-GH) compared with those in controls. The study of the isolated left ventricular papillary muscle showed that the AMI-GH group had changes (C= 1.50±0.59; AMI= 1.28±0.38; AMI-GH=1.98±0.41; P<0.05 for C vs AMI-GH) only in the tension at rest (TR - g/mm²) and in the time delta for a 50% decrease in the tension developed (TR50, ms) after stimulation with calcium (C=23.75±9.16; AMI=-16.56±14.82; AMI-GH=-4.69±8.39; P<0.05 for C vs AMI-GH) and in the delta of tension developed (TD, g/mm²) after stimulation with isoproterenol (C=0.99±0.17; AMI=0.54±0.62; AMI-GH=0.08±0.75; P<0.05 for C vs AMI-GH) compared with those in control animals. CONCLUSION: The early administration of GH in the experimental infarction model in rats may result in adverse effects on the process of ventricular remodeling.

2837 downloads

Showing

itens per page

Page of 1 Next

Select one or more results

All Alphabetic

Results

Comparative chart Download CSV

Statistics of

Send result

To*

Use ; (semicolon) to insert more emails.

Send to email

This page

Selected records

All references (max. 300)

Your email

Subject

Comments

Export format:

RIS (for EndNote, ProCite, Reference Manager, RefWorks, Citavi, etc.)

BibTeX

Citation

CSV (for Excel, etc)

Export:

This page

Selected itens

All references (max. 2000)

Sem resultados

No documents were found for your search

Glossary and search help

You can enrich your search in a very simple way. Use the search indexes combined with the connectors (AND or OR) and specify more your search.

For example, if you want to search for articles about
cases of dengue in Brasil in 2015, use:
ti:dengue and publication_year:2015 and aff_country:Brasil

See below the complete list of search indexes that can be used:

Index code	Element
ti	article title
au	author
kw	article keywords
subject	subject (title words, abstract and keywords)
ab	abstract
ta	journal short title (e.g. Cad. Saúde Pública)
journal_title	journal full title (e.g. Cadernos de Saúde Pública)
la	publication language code (e.g. pt - Portuguese, es - Spanish)
type	document type
pid	publication identifier
publication_year	publication year of publication
sponsor	sponsor
aff_country	country code of the author's affiliation
aff_institution	author affiliation institution
volume	article volume
issue	article issue
elocation	elocation
doi	DOI number
issn	journal ISSN
in	SciELO colection code (e.g. scl - Brasil, col - Colômbia)
use_license	article usage license code

SciELO - Scientific Electronic Library Online
Rua Dr. Diogo de Faria, 1087 – 9º andar – Vila Clementino 04037-003 São Paulo/SP - Brasil
Email: scielo@scielo.org

All the contents of this site www.scielo.br, except where otherwise noted, is licensed under a Creative Commons Attribution License.
more »