问题 多项选择题 X型题

抗心律失常药分为下列几类 ()

A.钠通道阻滞药

B.N胆碱受体阻断药

C.β肾上腺素受体阻断药

D.选择性延长复极过程的药物

E.钙拮抗药

答案

参考答案:A, C, D, E

解析:抗心律失常药分类如下:①Ⅰ类抗心律失常药物,阻断心肌和心脏传导系统的钠通道,具有膜稳定作用,降低动作电位O相除极上升速率和幅度,减慢传导速度,延长动作电位时程(APD)和有效不应期(ERP)。对静息膜电位无影响。②Ⅱ类抗心律失常药物,是β受体阻滞药,抑制交感神经兴奋所致的起搏电流、钠电流和L-型钙电流增加,表现为减慢4相舒张期除极速率而降低自律性,降低动作电位。相上升速率而减慢传导性。③Ⅲ类抗心律失常药物,延长动作电位时程药,抑制多种钾电流。④Ⅳ类抗心律失常药物,是钙通道阻滞药。

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[ ]

A. After lunch

B. Before lunch

C. In the morning

D. In the evening

3. Tom went to a restaurant to _____. [ ]

A. buy eye glasses

B. have lunch

C. buy some books

D. sell eye glasses

4. Before reading their books the old people in the restaurant _____. [ ]

A. drank tea

B. took their glasses off

C. bought glasses

D. put their glasses on

5. In fact, Tom _____. [ ]

A. liked eye glasses

B. went to the wrong shop

C. couldn't read at all

D. knew the man in the shop

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