Table 1.

Amplitude, FW, and t _max⁡ of the action potentials from smooth muscle and Primo-vessels. The amplitude means the difference between the maximum potential and the rest potential. The FW means the time from depolarizing to repolarizing to the rest potential. The t _max⁡ means time that is taken to arrive at the maximum potential. The amplitude of the action potential from Primo-vessels was larger than that from smooth muscle. It took similar time for depolarizing of all types of pulses including pacemaker, but their repolarizing time varied.

	Amplitude (mV)	FW (s)	t max⁡ (s)
Pacemaker pulse	4.45 ± 3.02	1.83 ± 0.90	0.39 ± 0.16
Type I pulse	10.02 ± 8.36	0.88 ± 0.38	0.31 ± 0.10
Type II pulse	13.67 ± 8.69	2.75 ± 1.17	0.38 ± 0.15