Table I.

Action Potential Parameters of Rabbit Sinoatrial Node Cells Used in Coupling Clamp Experiments

Cell		MDP		APA		IBI		APD50		APD90		DDR		V̇ max
		mV		mV		ms		ms		ms		mV/s		V/s
950111A		−56		82		358		118		148		136		4.3
950111B		−61		86		331		77		104		101		4.4
950117A		−56		84		236		79		105		145		6.4
950117B		−55		83		257		68		97		93		6.7
950131A		−45		66		344		75		106		59		2.9
950131B		−59		78		424		88		119		68		3.4
950803-1A		−61		90		279		64		81		117		9.3
950803-1B		−68		93		442		119		148		50		7.9
950803-2A		−57		83		310		60		81		95		7.0
950803-2B		−62		90		390		115		143		80		6.8
Mean ± SD		−58 ± 6		84 ± 8		337 ± 69		86 ± 23		113 ± 26		94 ± 32		5.9 ± 2.1
Model		−66		97		388		92		125		78		6.9

MDP, maximum diastolic potential; APA, action potential amplitude; V̇ _max, maximum upstroke velocity.