Myocardial Contraction
Mostrando 13-24 de 121 artigos, teses e dissertações.
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13. EFFECT OF AQUEOUS FRACTION OF LEAVES DE COSTUS SPIRALIS (JACQ.) ROSCOE CONTRACTILE FUNCTION ON HEART MAMMALS. / EFEITO DA FRAÇÃO AQUOSA DAS FOLHAS DE COSTUS SPIRALIS (JACQ.) ROSCOE SOBRE A FUNÇÃO CONTRÁTIL DO CORAÇÃO DE MAMÍFEROS.
Teas and infusions from C. spiralis leaf have largely been used by folk medicine as diuretic, hypotensor, cytotoxic, immunomodulator, antilithiasic, antidiarrheic, antispasmodic, antiurolitic, antimicrobian, antifungic, antioxidant, antileishmania activity, antiinflamatory, and antiedematogenic activity. In spite of these biological effects attributed to the
Publicado em: 2011
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14. Desenvolvimento, caracterizacao e aplicacao da matriz FTO/POLI(3-aminofenol) na deteccao de marcador de lesao cardiaca por fotoluminescencia de quantum dots
The heart is a vital organ propelling blood, that carries oxygen and nutrients throughout the body, but whenever these components do not reach it due to arterial obstruction, there is an electrical instability in the process of contraction of the muscle, causing arrhythmias that often, in less than an hour, causes acute myocardial infarction. The problem and
Publicado em: 2011
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15. Efeitos de um programa de exercício físico prévio ao infarto do miocárdio sobre a morfologia e a função contrátil do ventrículo esquerdo de ratos / Effects of a physical exercise program previous to myocardial infarction on the left ventricle morphology and contractile function of rats
The aim of this study was to verify the effects of a treadmill running program previous to myocardial infarction (MI) on the myocardium morphology and contractile function of rats. One-month old male Wistar rats were randomly divided into three groups: sedentary infarcted (INF SED, n = 13), exercised infarcted (INF EX, n = 26) and simulated infarction (SHAM,
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 20/08/2010
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16. Efeitos da CATUAMA sobre a função ventricular, a mecânica do músculo cardíaco e os parâmetros hemodinâmicos de ratos / Effects of herbal medicine CATUAMA on cardiac function and hemodynamic parameters in rats
O fitoterápico CATUAMA, utilizado no Brasil há mais de 20 anos, e seu extrato isolado T catigua apresentam efeito de reversão e prevenção da fibrilação ventricular (FV). FV, em pacientes com disfunção cardíaca, representa uma importante causa de morte súbita no mundo ocidental. Neste contexto, os efeitos de CATUAMA sobre a função cardíaca e os
Publicado em: 2010
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17. Efeitos da acidose lática nos processos da contratilidade cardíaca do teleósteo de água doce matrinxã, Brycon cephalus
In the majority of the fish species already studied, cardiac force contraction is sensitive to small changes in the extracellular pH. During intense swimming, the increased lactic acid (LA) levels significantly reduce the Fc, impairing the myocardial contractile performance. The freshwater teleost matrinxã, Brycon cephalus, is a reofilic species presenting
Publicado em: 2009
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18. Experimental model of heart failure in rabbits / Desenvolvimento de modelo experimental de insuficiencia cardiaca em coelhos
Introduction: The development of heart failure experimental models is important to better understanding of physiopathology and validation of new therapeutic strategies. Few previous reports compared the models within the same animal species. Objective: Development and standardization of heart failure experimental model in rabbits with two interventions. Mate
Publicado em: 2008
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19. Contributions of perfusion and myocardic cintilography function with double isotope and low dobutamina dose validity: evaluation of cellular integrity and contractile reserve in viable myocardium identification / Contribuições da cintilografia de perfusão e função miocárdica com duplo isótopo na vigência de baixa dose de dobutamina: avaliação da integridade celular e reserva contrátil na identificação do miocárdio viável
Em pacientes portadores de insuficiência coronariana com prognóstico desfavorável pela presença de disfunção ventricular significativa, a pesquisa de viabilidade miocárdica traz contribuições ao predizer a possibilidade de recuperação contrátil após revascularização. Os segmentos miocárdicos com disfunção contrátil por hipoperfusão podem
Publicado em: 2007
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20. Redução da função sistolica e diastolica do ventriculo esquerdo, estimada pela velocidade do anel mitral, em pacientes hipertensos com e sem hipertrofia ventricular / Longitudinal mitral annulus velocities are reduced in hypertensive subjects with left ventricule hypertrophy
Epidemiological studies have established a continuous relationship between the left ventricular (LV) mass and cardiovascular risk in the general and hypertensive population. The poorer prognosis of hypertensive subjects with major increases in LV mass has been, in part, attributed to myocardial dysfunction, but it remains unknown whether hypertensive subject
Publicado em: 2006
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21. The role of the vagus nerve in hypertonic resuscitation of hemorrhagic shocked dogs
Previous studies have suggested a critical role for the vagi during the hypertonic resuscitation of hemorrhagic shocked dogs. Vagal blockade prevented the full hemodynamic and metabolic recovery and increased mortality. This interpretation, however, was challenged on the grounds that the blockade also abolished critical compensatory mechanisms and therefore
Brazilian Journal of Medical and Biological Research. Publicado em: 2004-03
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22. Study of the Myocardial Contraction and Relaxation Velocities through Doppler Tissue Imaging Echocardiography: A New Alternative in the Assessment of the Segmental Ventricular Function
OBJECTIVE: Doppler tissue imaging (DTI) enables the study of the velocity of contraction and relaxation of myocardial segments. We established standards for the peak velocity of the different myocardial segments of the left ventricle in systole and diastole, and correlated them with the electrocardiogram. METHODS: We studied 35 healthy individuals (27 were m
Arquivos Brasileiros de Cardiologia. Publicado em: 2002-02
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23. Necropsy study of the association between sudden cardiac death, cardiac isoenzymes and contraction band necrosis.
AIMS: To assess whether a quantitative analysis of myocardial contraction bands could aid the postmortem identification of early myocardial infarction, especially if used in conjunction with cardiac isoenzyme activities. METHODS: Sixty four coroner's necropsies were grouped by gross and histological findings into 26 cases of definite non-cardiac death, 12 ca
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24. A circulating myocardial depressant substance in humans with septic shock. Septic shock patients with a reduced ejection fraction have a circulating factor that depresses in vitro myocardial cell performance.
We have previously described a subpopulation of patients with septic shock who had a reversible depression of radionuclide-determined left ventricular ejection fraction (EF). To investigate the mechanism of this myocardial depression, an in vitro model of mammalian myocardial cell performance was established employing primary spontaneously beating rat myocar