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3101403134

金虫 (小有名气)

[求助] 强心苷解毒为什么可用利多卡因

西地兰作为强心苷药物有使心率减慢的作用,高剂量的强心苷可抑制Na+–K+–ATP酶使细胞失钾,而用利多卡因能解强心苷中毒,利多卡因也会使心率减慢,而且它是钠离子通道阻滞剂,会使胞内钾进一步降低,求解释利多卡因解强心苷中毒的机制?
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diligencesun
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3101403134

金虫 (小有名气)

利多卡因主要解救强心苷中毒导致的快速型室性心律失常。高剂量的强心苷可抑制Na+–K+–ATP酶使细胞失钾,使肯野纤维的自律性提高,导致快速性室性心律失常。西地兰作为强心苷药物有使心率减慢的作用,导致慢性心律失常,一般为室上性的,如窦性心动过缓,用阿托品治疗。
diligencesun
2楼2013-05-13 22:18:35
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