Table 3.

Comparison of device parameters before and after CMR

	before MR	after MR	P a
P-wave amplitude (mV)	2.87 ± 1.86	3.10 ± 1.70	0.32
R-wave amplitude (mV)	12.27 ± 5.32	12.05 ± 5.44	0.59
Atrial lead impedance (Ohm)	469 ± 61	468 ± 65	0.65
Ventricular lead impedance (Ohm)	601 ± 120	603 ± 118	0.57
Atrial PCT (V@0.4 ms)	0.66 ± 0.25	0.66 ± 0.20	1.0
Ventricular PCT (V@0.4 ms)	0.63 ± 0.26	0.55 ± 0.28	0.1
Battery voltage (V)	2.97 ± 0.42	2.97 ± 0.42	n.a.

CMR, Cardiovascular Magnetic Resonance; PCT, pacing capture threshold, ^aWilcoxon signed rank test