Conduction Velocity in Various Regions of the Ureter

Abstract

Conduction velocity of excitation in various regions of the cat ureter was studied through the simultaneous recordings of five action potentials of the ureter by using of the multiple electrodes. The conduction velocity was very slow in the renal pelvis where the pacemaker was located, i.e., about 2mm/sec on an average. In the proximal region of the ureter, the velocity gradually increased with distance from the pelvis, while the velocity became constant (about 200mm/sec) in the regions more than about 15 mm away from the renal end of the ureter. It was concluded that the conduction velocity of excitation was significantly different between the pacemaker region and the follower tissue of the ureter.