高血钾对自律细胞具有双重效应:①如果K+增高作用于静止膜电位值为主,则自律细胞的节律性增强;②如果K+作用于舒张除极的4时相,使其曲线缓慢上升,则自律细胞放电被抑制,从而导致心率减慢。由于这种双重效应的作用,因此高血钾一方面引起心率减慢,一方面又能引起快速性室性自主节 Hyperkalemia has a dual effect on autonomic cells: ①If K + increases the static membrane potential, the rhythmicity of autonomic cells is enhanced; ② If K + acts on the 4 o’clock of diastolic depolarization and makes its curve rise slowly, Then self-paced cell discharge is inhibited, resulting in a slowed heart rate. As a result of this dual effect, hyperkalemia, on the one hand, causes heart rate to slow, on the one hand, and can cause rapid sexual autonomy Festival