Objective To evaluate left heart function in pre-dialysis patients with different stages of chronic kidney disease (CKD) by tissue Doppler velocity imaging (TVI).
目的采用组织多普勒速度成像（TVI）评价不同阶段慢性肾脏疾病患者的左心功能变化。
The calculation results show that both the velocity and pressure in gas explosion process experience the stages of "rise - fall - second wave - fall - swing".
计算结果表明，矿井瓦斯气体爆炸过程中速度和压力值均会经历上升-下降-二次波峰-下降-震荡的过程。
ObjectiveTo study the speciality of cerebral blood flow velocity of patients with spinal cord injury at different stages after injury.
目的检测高位脊髓损伤患者伤后不同时期大脑动脉血流速度变化特点。
ObjectiveTo study the speciality of cerebral blood flow velocity of patients with spinal cord injury at different stages after injury.
目的检测高位脊髓损伤患者伤后不同时期大脑动脉血流速度变化特点。
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