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Search Results: 1 - 10 of 3007 matches for " Koike Marcia Kiyomi "
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Subendocardial fibrosis in remote myocardium results from reduction of coronary driving pressure during acute infarction in rats
Frimm, Clovis de Carvalho;Koike, Marcia Kiyomi;Cúri, Mariana;
Arquivos Brasileiros de Cardiologia , 2003, DOI: 10.1590/S0066-782X2003000500004
Abstract: objective: to investigate the role of hemodynamic changes occurring during acute mi in subsequent fibrosis deposition within non-mi. methods: by using the rat model of mi, 3 groups of 7 rats each [sham, smi (mi <30%), and lmi (mi >30%)] were compared. systemic and left ventricular (lv) hemodynamics were recorded 10 minutes before and after coronary artery ligature. collagen volume fraction (cvf) was calculated in picrosirius red-stained heart tissue sections 4 weeks later. results: before surgery, all hemodynamic variables were comparable among groups. after surgery, lv end-diastolic pressure increased and coronary driving pressure decreased significantly in the lmi compared with the sham group. lv dp/dtmax and dp/dtmin of both the smi and lmi groups were statistically different from those of the sham group. cvf within non-mi interventricular septum and right ventricle did not differ between each mi group and the sham group. otherwise, subendocardial (se) cvf was statistically greater in the lmi group. se cvf correlated negatively with post-mi systemic blood pressure and coronary driving pressure, and positively with post-mi lv dp/dtmin. stepwise regression analysis identified post-mi coronary driving pressure as an independent predictor of se cvf. conclusion: lv remodeling in rats with mi is characterized by predominant se collagen deposition in non-mi and results from a reduction in myocardial perfusion pressure occurring early on in the setting of mi.
Subendocardial fibrosis in remote myocardium results from reduction of coronary driving pressure during acute infarction in rats
Frimm Clovis de Carvalho,Koike Marcia Kiyomi,Cúri Mariana
Arquivos Brasileiros de Cardiologia , 2003,
Abstract: OBJECTIVE: To investigate the role of hemodynamic changes occurring during acute MI in subsequent fibrosis deposition within non-MI. METHODS: By using the rat model of MI, 3 groups of 7 rats each [sham, SMI (MI <30%), and LMI (MI >30%)] were compared. Systemic and left ventricular (LV) hemodynamics were recorded 10 minutes before and after coronary artery ligature. Collagen volume fraction (CVF) was calculated in picrosirius red-stained heart tissue sections 4 weeks later. RESULTS: Before surgery, all hemodynamic variables were comparable among groups. After surgery, LV end-diastolic pressure increased and coronary driving pressure decreased significantly in the LMI compared with the sham group. LV dP/dt max and dP/dt min of both the SMI and LMI groups were statistically different from those of the sham group. CVF within non-MI interventricular septum and right ventricle did not differ between each MI group and the sham group. Otherwise, subendocardial (SE) CVF was statistically greater in the LMI group. SE CVF correlated negatively with post-MI systemic blood pressure and coronary driving pressure, and positively with post-MI LV dP/dt min. Stepwise regression analysis identified post-MI coronary driving pressure as an independent predictor of SE CVF. CONCLUSION: LV remodeling in rats with MI is characterized by predominant SE collagen deposition in non-MI and results from a reduction in myocardial perfusion pressure occurring early on in the setting of MI.
Low coronary perfusion pressure is associated with endocardial fibrosis in a rat model of volume overload cardiac hypertrophy
Guido, Maria Carolina;Koike, Márcia Kiyomi;Frimm, Clovis de Carvalho;
Revista do Hospital das Clínicas , 2004, DOI: 10.1590/S0041-87812004000500002
Abstract: left ventricular hypertrophy following volume overload is regarded as an example of cardiac remodeling without increased fibrosis accumulation. however, infarction is associated with increased fibrosis within the noninfarcted, hypertrophied myocardium, particularly in the subendocardial regions. it is conceivable to suppose that, as also occurs postinfarction, low coronary driving pressure may also interfere with accumulation of myocardial fibrosis following aortocaval fistula. purpose: to investigate the role of acute hemodynamic changes in subsequent deposition of cardiac fibrosis in response to aortocaval fistula. method: aortocaval fistula were created in 4 groups of wistar rats that were followed over 4 and 8 weeks: aortocaval fistula 4 and aortocaval fistula 8 (10 rats each) and their respective controls (sham-operated controls - sh), sh4 and sh8 (8 rats each). hemodynamic measurements were performed 1 week after surgery. hypertrophy and fibrosis were quantified by myocyte diameter and collagen volume fraction at the end of follow up. result: compared with sh4 and sh8, pulse pressure, left ventricular end-diastolic pressure, and +dp/dt were higher in aortocaval fistula 4 and aortocaval fistula 8, but -dp/dt was similar. coronary driving pressure (mm hg), used as an estimate of perfusion pressure, was lower in aortocaval fistula 8 (52.6 ± 4.1) than in sh8 (100.8 ± 1.3), but comparable between aortocaval fistula 4 (50.0 ± 8.9) and sh4 (84.8 ± 2.3). myocyte diameter was greater in aortocaval fistula 8, whereas interstitial and subendocardial fibrosis were greater in aortocaval fistula 4 and aortocaval fistula 8. coronary driving pressure correlated inversely and independently with subendocardial fibrosis (r2 = .86, p <.001), whereas left ventricular systolic pressure (r2 = 0.73, p = .004) and end-diastolic pressure (r2 = 0.55, p = 012) correlated positively and independently with interstitial fibrosis. conclusion: coronary driving pressure falls and ventricular p
Affect-Loaded Questions in Japanese Storytelling: An Analysis of Grammar, Prosody, and Body Movements of Story Recipients’ Questions  [PDF]
Chisato Koike
Open Journal of Modern Linguistics (OJML) , 2015, DOI: 10.4236/ojml.2015.55043
Abstract: The present study explores affective stance in conversational storytelling by investigating the ways in which unknowing story recipients display affective stances toward a teller’s story through questions that deploy multimodal resources. The data are based on videotaped natural face-to-face conversations between native Japanese speakers. While unknowing story recipients ask questions of the storyteller only to elicit factual information (“neutral questions”), they also ask questions layered with affect (“affect-loaded questions”). Building on studies on affect and stance, assessment, questions, and alignment and affiliation in storytelling, I demonstrate how unknowing story recipients ask affect-loaded questions to elicit and display affective stances toward story contents by exploiting linguistic and non-linguistic resources. First, I explicate how unknowing story recipients employ not only linguistic devices (e.g., emotion words, wh-questions, and deictic expressions such as sonna “like that”), but also prosody, facial expressions, body movements, and pre-/concurrent-laughter in order to load questions with affective stance that display, for example, disgust, humor, sarcasm, criticism, or surprise. Secondly, I show how unknowing story recipients use rhetorical questions to express their affect (rather than to elicit information from the storyteller). Thirdly, I demonstrate how affiliation of affective stance between storyteller and unknowing story recipients influences the trajectory of storytelling and how the participants negotiate their affective stances. This study sheds light on the interactional process of how participants in talk-in-interaction display affective stance through a range of multimodal resources, by examining how unknowing story recipients ask affect-loaded questions of the storyteller. It illuminates the social practice of story recipients’ active participation in storytelling activity that is embedded in social interaction, through their use of questions that dynamically co-construct and negotiate affective stance.
Características clínicas e gravidade de pacientes internados em UTIs públicas e privadas
Nogueira, Lilia de Souza;Sousa, Regina Marcia Cardoso de;Padilha, Katia Grillo;Koike, Karina Mitie;
Texto & Contexto - Enfermagem , 2012, DOI: 10.1590/S0104-07072012000100007
Abstract: this study aimed to compare clinical characteristics, evolution and severity of adult patients admitted in public and private intensive care units. it is a retrospective, longitudinal and quantitative analysis of 600 patients admitted in four intensive care units of s?o paulo, brazil. differences were found between patients admitted in private and public hospitals regarding the following variables: age, origin, length of stay and mortality in the critical unit, cardiac, hematological, neurological and kidney failures and some comorbidities. the results reveal the importance of analyzing in detail clinical characteristics and healthcare of patients admitted in public institutions, because of the high mortality found. the intensive care nurse can contribute to change this scenario, because she/he has a leadership role in planning and provision of resources for intensive care.
Características clínicas e gravidade de pacientes internados em UTIs públicas e privadas
Lilia de Souza Nogueira,Regina Marcia Cardoso de Sousa,Katia Grillo Padilha,Karina Mitie Koike
Texto & Contexto - Enfermagem , 2012,
Abstract: La investigación tuvo como objetivo comparar las características clínicas, evolución y gravedad de pacientes adultos ingresados en Unidades de Cuidados Intensivos públicas y privadas. Este es un estudio retrospectivo, longitudinal y cuantitativo de 600 pacientes ingresados en cuatro Unidades de Cuidados Intensivos en S o Paulo, Brasil. Fueron encontradas diferencias entre los pacientes de los hospitales privados y públicos para las variables: edad, procedencia, tiempo de internación y mortalidad en la unidad crítica, insuficiencia cardiológica, hematológica, neurológica y renal, además de algunas comorbilidades. Los resultados revelan la importancia de se analizar las características clínicas y la asistencia prestada en las instituciones públicas, en comparación a la tasa de mortalidad. La Enfermera de Cuidados Intensivos puede ayudar a cambiar esta situación, ya que tiene un papel de liderazgo en la planificación de la atención y la provisión de recursos para cuidados intensivos.
Avalia??o anat?mica da valva tricúspide
Jatene, Fábio B;Koike, Márcia Kiyomi;Monteiro, Rosangela;Veronezi, Siomara Christina;Magalh?es, Maria Helena G;Jatene, Adib D;
Revista Brasileira de Cirurgia Cardiovascular , 1992, DOI: 10.1590/S0102-76381992000100004
Abstract: the purpose of this study is to evaluate anatomic data of the tricuspid valve and adjacent area to help in diagnostic and surgical procedures. in 101 normal human fixed hearts (84% male; 61 % white ethnic group and mean age of 30.0 + 15.5 years old), we analysed: number of leaflets; tricuspid ring perimeter; size of leaflets and its occupation in ring perimeter; koch's triangle area. these aspects were related with age, sex and ethnic group. there were 73% with three, in 26% with two and in 1% with four leaflets. the ring perimeter changed 79 to 158 mm (109.6 +12.2) and was larger (9%) in man. regarding the relative occupation on ring the anterior represented 48%, the septal 36% and the inferior 16% of occupation area in tricuspid ring. the mean area of koch's triangle was 167.79 mm 2 + 71.88 mm2, 10% larger in non white ethnic group and in elderly patients. in conclusion, normal tricuspid valves presented variations related to sex, age and ethnic group.
Plateau of the Magnetization Curve of the S=1/2 Ferromagnetic-Ferromagnetic-Antiferromagnetic Spin Chain
Kiyomi Okamoto
Physics , 1995, DOI: 10.1016/0038-1098(96)00007-5
Abstract: I analytically study the plateau of the magnetization curve at $M/M_{\rm S} = 1/3$ (where $M_{\rm S}$ is the saturation magnetization) of the one-dimensional $S=1/2$ trimerized Heisenberg spin system with ferromagnetic ($J_{\rm F}$)-ferromagnetic ($J_{\rm F}$)-antiferromagnetic ($J_{\rm A}$) interactions at $T=0$. I use the bosonization technique for the fermion representation of the spin Hamiltonian through the Jordan-Wigner transformation. The plateau appears when $\gamma \equiv J_{\rm F}/J_{\rm A} \allowbreak < \gamma_{\rm C}$, and vanishes when $\gamma > \gamma_{\rm C}$, where the critical value $\gamma_{\rm C}$ is estimated as $\gamma_{\rm C} = 5 \sim 6$. The behavior of the width of the plateau near $\gamma_{\rm C}$ is of the Kosterlitz-Thouless type. The present theory well explains the numerical result by Hida.
Critical Properties of the transition between the Haldane phase and the large-D phase of the spin-1/2 ferromagnetic-antiferromagnetic Heisenberg chain with on-site anisotropy"
Kiyomi Okamoto
Physics , 1995, DOI: 10.1088/0305-4470/29/8/012
Abstract: We analytically study the ground-state quantum phase transition between the Haldane phase and the large-$D$ (LD) phase of the $S=1/2$ ferromagnetic-antiferromagnetic alternating Heisenberg chain with on-site anisotropy. We transform this model into a generalized version of the alternating antiferromagnetic Heisenberg model with anisotropy. In the transformed model, the competition between the transverse and longitudinal bond alternations yields the Haldane-LD transition. Using the bosonization method, we show that the critical exponents vary continuously on the Haldane-LD boundary. Our scaling relations between critical exponents very well explains the numerical results by Hida.
Inversion Phenomena of the Anisotropies of the Hamiltonian and the Wave Function in Quantum Spin Chains
Kiyomi Okamoto
Physics , 2013, DOI: 10.7566/JPSCP.1.012025
Abstract: We investigate the inversion phenomena between the XXZ anisotropies of the Hamiltonian and the wave function in quantum spin chains. We focus on the S=1/2 geometrically frustrated 3-leg ladder system with the XXZ interaction anisotropy. By use of the degenerate perturbation theory from the strong rung coupling limit, we have obtained the ground-state phase diagram. In some parameter regions, the Tomonaga-Luttinger spin liquid state is realized in spite of the Ising-like anisotropy, and the Neel state in spite of the XY-like anisotropy.
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