[超极化电流对兔心脏窦房结和结周细胞动作电位的影响]
[Effects of hyperpolarizing currents on the action potentials of nodal and perinodal sino-atrial cells of the rabbit heart].
作者信息
Kreitner D
出版信息
C R Acad Hebd Seances Acad Sci D. 1977 Nov 28;285(15):1319-21.
PMID:414847
Abstract
A technique of focal polarization allowed us to confirm that the action potentials of the true rabbit heart pacemaker cells possess a rapid sodium channel normally inactivated because of the low value of the take-off potential of this tissue. The latent pacemaker cells are regular sinocaval cells depolarized as a consequence of the proximity of true pacemaker cells.
摘要
一种局灶性极化技术使我们能够证实，真正的兔心脏起搏细胞的动作电位具有一个快速钠通道，该通道通常因该组织的起始电位值较低而失活。潜在起搏细胞是由于真正起搏细胞的接近而发生去极化的正常窦腔细胞。
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