Résumé
ObjectiveTo assess right ventricular diastolic function in patients with essential hypertension using tricuspid valve flow spectrum and tricuspid annulars motion dectected by echocardiography. MethodsAccording to Ganau′s categories, 124 patients with essential hypertension were enrolled,which were divided into four groups:normal left ventricular configurational group (group Ⅰ, n =32 ), centripetal reconstruction group (group Ⅱ, n =30), centripetal hypertrophy group ( group Ⅲ, n =32), eccentric hypertrophy group ( group Ⅳ, n =30 ). Control group consisted of 35 normal subjects pulsed wave Doppler(PW) data and tissue Doppler imaging(TDI) data were acquired from tricuspid and its' annulus respectively on apical four chamber view. ResultsEPA ＞ 1 was observed in control group as well as group Ⅰ and Ⅱ ,while E/A ＜ 1 in group Ⅲ and group Ⅳ ,there were significant differences between them. Em/Am ＜ 1 was observed in all of patients with hypertension,there were significant differences among them( P ＜ 0.05 ) .ConclusionTissue Doppler imaging was more sensitive than pulse Doppler in evaluating decreased right ventricular diastolic function in patients with essential hypertension, and the decrement of the function was different in degree based on variant left ventricular configurations.
Résumé
Anti-tyrosinase assay guided isolation of marine-derived fungus Botrytis sp.led to separation of three ?-pyrone compounds.The structures of these compounds were elucidated by various physicochemical analytical methods.The bioactivities of these ?-pyrone derivatives were evaluated in terms of anti-tyrosinase activity.By correlating the bioactivities of these compounds with their structures,it concluded that the ?-pyrone with pentyl group gives highest anti-tyrosinase activity.