Table 2.

A comparison of the electrical properties of hECTs.

Ref	Electrical Measurement Conditions	Conduction Velocity	Action Potential Duration	Action Potential Amplitude	Depolarization Velocity (Vmax)	Other Measurements
Kensah et al [1]	Microelectrode Array: hECTs; spontaneous beating	4.9 cm/s
Mihic et al [2]	Optical Mapping: calcium-sensitive dye; spontaneous beating		430–570 ms (Ca2+ cycle durations)
Schaaf et al [3]	Patch clamp: spontaneous beating		318–364 ms 816–958 ms	62–70 mV (APD<500ms) 82–88 mV (APD>500ms)	5–6 V/s (APD<500ms) 9–12 V/s (APD>500ms)	MDP = −47–51 mV
Turnbull et al [4]	Optical mapping: voltage-sensitive dye; 2Hz; field stimulation		143–225 ms
Thavandiran et al [5]	Optical Mapping: voltage-sensitive dye	17–33cm/s
Nunes et al [6]	Ca2+ transients: single CMs; spontaneous beating Optical Mapping: voltage-sensitive dye; hECT; point stimulation Patch clamp: 1Hz	~11.5–18.5 cm/s (optical mapping)	100–150 ms (patch clamp)	~70 mV (patch clamp)	~125V/s (patch clamp)	RMP ≈ −100mV (patch clamp) Capacitance = 18–21 pF (patch clamp)
Zhang et al [7]	Optical Mapping: voltage-sensitive dye; 0.5Hz; point stimulation	25.1 cm/s	308–368 ms

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