http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
장희상,김재훈,배병석,신승민,김기주,박정길,강현재,이봉렬,정병천 대한심장학회 2009 Korean Circulation Journal Vol.39 No.12
Background and Objectives: There have been very few pathophysiologic studies on isolated diastolic dysfunction. We hypothesized that the characteristics of isolated diastolic dysfunction would be located, on the clinical continuum, between those of a normal heart and diastolic heart failure. Subjects and Methods: We enrolled 102 subjects who had no history of overt symptoms of heart failure and who had a left ventricular ejection fraction of more than 50%. They were examined for myocardial deformation and rotation using the two-dimensional speckle tracking image (2D-STI) technique. Results: The circumferential strains and radial strain at the apical level (RSapex) were related to the ratio of the transmitral early peak velocity over the early diastolic mitral annulus velocity (E/E’). After adjustment for age, the RSapex showed a positive relationship with the E/E’ ratio; whereas, the circumferential strains did not. Instead, the circumferential strains demonstrated a significant correlation with age. Basal rotation and left ventricular (LV) torsion were also related to age, but had no relationship with the E/E’ ratio. However, as the E/E’ ratio value increased, systolic mitral annular velocity decreased. Conclusion: Except for the RSapex, LV myocardial deformation and rotation did not vary with the degree of E/E’ ratio elevation when there was no associated diastolic heart failure. Additionally, in clinical situations such as isolated diastolic dysfunction, the advancement of age has a relatively greater influence on characteristics of LV myocardial deformation and rotation rather than on the E/E’ ratio. Background and Objectives: There have been very few pathophysiologic studies on isolated diastolic dysfunction. We hypothesized that the characteristics of isolated diastolic dysfunction would be located, on the clinical continuum, between those of a normal heart and diastolic heart failure. Subjects and Methods: We enrolled 102 subjects who had no history of overt symptoms of heart failure and who had a left ventricular ejection fraction of more than 50%. They were examined for myocardial deformation and rotation using the two-dimensional speckle tracking image (2D-STI) technique. Results: The circumferential strains and radial strain at the apical level (RSapex) were related to the ratio of the transmitral early peak velocity over the early diastolic mitral annulus velocity (E/E’). After adjustment for age, the RSapex showed a positive relationship with the E/E’ ratio; whereas, the circumferential strains did not. Instead, the circumferential strains demonstrated a significant correlation with age. Basal rotation and left ventricular (LV) torsion were also related to age, but had no relationship with the E/E’ ratio. However, as the E/E’ ratio value increased, systolic mitral annular velocity decreased. Conclusion: Except for the RSapex, LV myocardial deformation and rotation did not vary with the degree of E/E’ ratio elevation when there was no associated diastolic heart failure. Additionally, in clinical situations such as isolated diastolic dysfunction, the advancement of age has a relatively greater influence on characteristics of LV myocardial deformation and rotation rather than on the E/E’ ratio.
白榮植,金一憲,張喜相 慶熙大學校 1984 論文集 Vol.13 No.-
A series of laboratory test is performed to determine the optimum shotcrete mix design. Engineering properties of various cements and aggregates are tested. Using the results obtained in the tests, the standard concrete mix design can be obtained. Compatibility of cements and accelerators is also investigated by comparing the compress strength of shotcrete specimens with various types and contents of accelerators. Finally, a recommended shotcrete mix design is suggested for practical use in field.
식염수 세척이 비강 점액분비에 미치는 영향: 생체 내 및 생체 외 실험
김정수,이규엽,정상식,김부일,장희상,송선희 대한이비인후과학회 2003 대한이비인후과학회지 두경부외과학 Vol.46 No.11
Background and Objectives:ever, there are not enough scientific evidences supporting the effect of irrigation of the nose with saline solution. We investigated the efects of saline solution on mucus secretion, vascular response, subjective symptoms and nasal cavity air-space volume changes using in vitro and in vivo test. Materials and Method:In vitro study, inferior turbinate mucosa were harvested from n. Concentrations of mucin and lysozyme were measured from them. In vivo study, the nasal cavity of normal control group and patients with septal deviation were irrigated with 0.9%, 3%, 6% of saline solutions. Lavage fluids were collected from the ipsilateral and contralateral sides to measure the concentrations of varies constituents such as mucin, lysozyme, total protein, and albumin. ons. Results:In vitro study, the concentrations of mucin and lysozyme were increased in the dose-dependent manner by increasing the osmolarity. In vivo study, the sensation of rhinorrhea, pain and nasal blockage were increased as the concentration of saline increased. Furthermore, the concentrations of mucus and total protein also increased by increasing concentration of saline solution at ipsilateral side. However, contralateral reflex-mediated effect were negligible. There was no change in air-space volume. Conclusion:The saline solution induced secretion of mucus mignt be through axon reflex mediated neuronal efect. The increased mucus may change the rheology of mucus which, in turn, could increase mucociliary action in the nasal cavity. (Korean J Otolaryngol 2003 ;46 :940-5)