Table 2. Electrophysiologic parameters from 27 BC of the same batch of EBs.

Atrial-like
Age(days)	CL(sec)	BPM	Amplitude	MDP	30–40/70–80	APD50	APD90	APD50/APD90	V/max(V/sec)	cAPD90_B	cAPD90_H	cAPD90_Fri	cAPD90_Fra
118	0.7	91.7	103.0	−73.0	0.42	78.0	186.0	0.4	20.0	230.0	241.6	214.3	186.1
77	1.9	32.2	115.0	−71.0	1.10	207.9	298.5	0.7	42.4	218.8	249.9	242.7	298.3
49	0.5	121.0	98.7	−57.7	1.38	166.5	227.2	0.7	18.9	322.7	334.0	287.1	227.3
63	0.3	183.2	101.0	−62.0	1.42	148.4	206.3	0.7	47.7	360.5	421.9	299.3	206.4
M	0.8	107.0	104.4	−65.9	1.1	150.2	229.5	0.6	32.2	283.0	311.8	260.8	229.5
SD	0.7	62.8	7.3	7.3	0.5	54.2	49.0	0.1	14.9	69.6	84.4	39.4	48.9

Control action potential parameters derived from stable recordings obtained from 27 BC of the same batch of EBs. The information is sorted by the APD_30–40/APD_70–80 ratio (from the smallest [top] to the largest [bottom]). Age: number of days post-differentiation. The corresponding AP traces are pictured in Figure 2 . cAPD₉₀-B (Bazett’s correction); cAPD₉₀-H (Hodge’s correction); cAPD₉₀-Fri (Fridericia’s correction); cAPD₉₀-Fra (Framingham correction).