慢反应细胞

目的：采用乙酰胆碱（ACh）和阿托品对豚鼠左心室流出道慢反应自律细胞电活动的影响来间接反映迷走神经对左心室流出道自律细胞的支配和胆碱能受体的分布。

Objective : To investigate the innervation of parasympathetic nervous system and the distribution of muscarinic receptor ( M-R ) on pacemaker cell membrane in guinea-pig left ventricular outflow tract ( aortic vestibule ) .

进一步观察发现，在主动脉瓣右瓣与后瓣交界以下的局部区域，可记录到有明显4相自动去极化的慢反应自律细胞样的动作电位，并可被钙通道阻滞剂Mn2＋、硝苯吡啶阻断。

Of these preparations , they were all found a very small region below the right and the poster valves , the response showed a slow and low rising phase and a marked spontaneous depolarization in phase 4 . The response could be blocked by Mn2 + and nifedipine .

普罗帕酮对豚鼠左心室流出道慢反应自律细胞的电生理效应

The Electrophysiology Effect of Propafenone on Spontaneous Slow-Response Cell of Rats ' Left Ventricular Outflow Tract

目的探讨乙胺噻嗪抗心律失常作用是否与抑制慢反应心肌细胞有关。

METHODS The beating rate and action potentials of cultured slow response cardiomyocyte from neonatal rats was recorded .

结论过渡细胞属慢反应自律细胞，传导速度比普通房肌慢。

Conclusion The transitional cell may be a kind of slow-reaction cell with automatism frequency . It has a low conduction velocity .