Table 2. Electrocardiogram recordings in mice that received pcDNA3 or M₂AChR WT serum 10 weeks post-serum transfer.

	Wild Type Recipient	P2×7−/−Recipient	pcDNA3 Wild type serum	M2AChR Wild type serum
	pcDNA3 Wild type serum	M2AChR Wild type serum
RR Interval (ms)	210.45 ± 45.60	138.97 ± 10.53a	147.70 ± 21.24c	168.77 ± 27.33
Heart Rate (BPM)	337.20 ± 81.22	379.23 ± 13.70	384.23 ± 52.29c	359.15 ± 55.39
PR Interval (ms)	40.44 ± 8.55	34.84 ± 8.68	39.13 ± 1.48	40.10 ± 0.45
QRS Interval (ms)	9.63 ± 1.37	13.21 ± 1.25	13.86 ± 1.97	13.86 ± 1.52
QTc Interval (ms)	66.68 ± 1.13	85.43 ± 2.08	83.39 ± 2.91	74.89 ± 2.52
ST Height (mV)	0.020 ± 0.054	0.115 ± 0.057	−0.050 ± 0.022	- 0.015 ± 0.070d
JT interval	12.91 ± 1.14	19.07 ± 0.76a	16.88 ± 6.85	12.24 ± 2.92d

Comparison between WT pcDNA3 and WT M₂AChR and between P2×7^−/− pcDNA3 and P2×7^−/− M₂AChR are marked with the letters a and b, respectively. Comparison between WT pcDNA3 and P2×7^−/− pcDNA3 and between WT M₂AChR and P2×7^−/− M₂AChR are marked by the letter c and d, respectively. p < 0.05 was considered statistically significant difference. N = 5.