The paper discusses the distinctive features of grain size distribution of permafrost soils formed under conditions of continental lithogenesis and cryogenic weathering of rocks. As a functional consequence of surface...The paper discusses the distinctive features of grain size distribution of permafrost soils formed under conditions of continental lithogenesis and cryogenic weathering of rocks. As a functional consequence of surface erosion of mineral particles, the log-normal distribution of the density function of grain size is derived confirmed for any conditions and sediment types.展开更多
We tested the hypothesis that abnormal left ventricular(LV) relaxation is associated with concentric LV geometry. Methods and results: Doppler LV filling properties were studied in 1384 hypertensive participants witho...We tested the hypothesis that abnormal left ventricular(LV) relaxation is associated with concentric LV geometry. Methods and results: Doppler LV filling properties were studied in 1384 hypertensive participants without cardiovascular disease, from the HyperGEN population(731 women, 784 obese, 236 diabetic) and compared in four LV geometry groups; normal, concentric remodelling(3.5% ), eccentric(23% ), and concentric LV hypertrophy(4% ), based on echocardiographic LV mass index(in g/m2.7). Abnormal LV relaxation was identified by European Society of Cardiology criteria in 275 subjects(20% ). After accounting for significant confounders, E/A ratio and isovolumic relaxation time were not related to the presence of LV hypertrophy, but indicated abnormal relaxation when LV geometry was concentric(both P< 0.0001). Deceleration time of E velocity was prolonged with LV hypertrophy(P< 0.03), but the behaviour in relation to concentric LV geometry differed in the presence(prolonged) or absence(reduced) of LV hypertrophy(P=0.05), a difference independently related to the magnitude of both transmitral gradients and stroke volume(all P< 0.05). Logistic regression showed that, compared with normal LV geometry, the odds of abnormal LV relaxation was 2.3- fold greater when LV geometry was concentric and that LV hypertrophy conferred a borderline higher risk than normal LV mass. Conclusions: In hypertensive individuals without prevalent cardiovascular disease from a multi-ethnic population-based sample, delayed LV relaxation is independently associated with concentric LV geometry.展开更多
文摘The paper discusses the distinctive features of grain size distribution of permafrost soils formed under conditions of continental lithogenesis and cryogenic weathering of rocks. As a functional consequence of surface erosion of mineral particles, the log-normal distribution of the density function of grain size is derived confirmed for any conditions and sediment types.
文摘We tested the hypothesis that abnormal left ventricular(LV) relaxation is associated with concentric LV geometry. Methods and results: Doppler LV filling properties were studied in 1384 hypertensive participants without cardiovascular disease, from the HyperGEN population(731 women, 784 obese, 236 diabetic) and compared in four LV geometry groups; normal, concentric remodelling(3.5% ), eccentric(23% ), and concentric LV hypertrophy(4% ), based on echocardiographic LV mass index(in g/m2.7). Abnormal LV relaxation was identified by European Society of Cardiology criteria in 275 subjects(20% ). After accounting for significant confounders, E/A ratio and isovolumic relaxation time were not related to the presence of LV hypertrophy, but indicated abnormal relaxation when LV geometry was concentric(both P< 0.0001). Deceleration time of E velocity was prolonged with LV hypertrophy(P< 0.03), but the behaviour in relation to concentric LV geometry differed in the presence(prolonged) or absence(reduced) of LV hypertrophy(P=0.05), a difference independently related to the magnitude of both transmitral gradients and stroke volume(all P< 0.05). Logistic regression showed that, compared with normal LV geometry, the odds of abnormal LV relaxation was 2.3- fold greater when LV geometry was concentric and that LV hypertrophy conferred a borderline higher risk than normal LV mass. Conclusions: In hypertensive individuals without prevalent cardiovascular disease from a multi-ethnic population-based sample, delayed LV relaxation is independently associated with concentric LV geometry.
