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老年高钾血症有哪些症状?

2019-03-27 阅读量:2938次
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老年高钾血症患者心血管系统和神经肌肉系统症状的严重性取决于血钾升高的程度和速度,其次还与有无其他血浆电解质和水代谢紊乱合并存在有关。具体临床症状如下所述。

1、心血管症状

高钾使心肌受抑,心肌张力减低,故有心动徐缓、心脏扩大和心音减弱的现象,易发生心律失常但不发生心力衰竭。心电图有特征性改变且与血钾升高的程度相关。当血钾大于5.5mmol/L时心电图表现为Q-T间期缩短,T波高尖对称,基底狭窄而呈帐篷状。血钾为7~8mmol/L时P波振幅降低,P-R间期延长以至P波消失。

2、神经肌肉症状

早期常有四肢及口周感觉麻木、极度疲乏、肌肉酸疼及肢体苍白湿冷。血钾浓度达7mmol/L时四肢麻木软瘫,先为躯干后为四肢,最后影响到呼吸肌,发生窒息。中枢神经系统可表现为烦躁不安或神志不清。

3、其他症状

由于高钾血症引起乙酰胆碱释放增加,故可引起恶心、呕吐和腹痛。由于高钾对肌肉的毒性作用可引起四肢瘫痪和呼吸停止。所有高钾血症均有不同程度的氮质血症和代谢性酸中毒。后者可加重高钾血症。

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2019-03-27

高钾血症有哪些表现及如何诊断

2019-03-27

老年高钾血症应该做哪些检查?

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