Heartbeat Cycle Length Detection by a Ballistocardiographic Sensor in Atrial Fibrillation and Sinus Rhythm

Table 1

ECG and BCG interval characteristics before and after cardioversion.

	Atrial fibrillation	Sinus rhythm	value
	Mean (±SD)	Mean (±SD)
ECG interval [ms]	729 (±280)	1004 (±180)	<0.001
BCG interval [ms]	758 (±276)	983 (±199)	<0.001
Quality index [AU]^*	0.41 (±0.21)	0.52 (±0.27)	<0.001
BCG amplitude [AU]^*	0.088 (±0.047)	0.059 (±0.03)	<0.001
Integral BCG complex [AU]^*	0.018 (±0.011)	0.011 (±0.006)	<0.001

AU: arbitrary units.