Using Flexible Curved Noncontact Active Electrodes to Monitor Long-Term Heart Rate Variability

Table 1

Performance of R-peak detection.

Subject	Actual total heartbeat number	Detecting total heartbeat number	True positive (TP)	False positive (FP)	False negative (FN)	Sensitivity (Se)	Positive predictive value (PPV)
1	2727	2725	2723	2	4	0.999	0.999
2	2566	2524	2478	46	88	0.966	0.982
3	3355	3355	3355	0	0	1.000	1.000
4	2577	2569	2555	14	22	0.991	0.995
5	2534	2510	2494	16	40	0.984	0.994
6	3052	3048	3034	14	18	0.994	0.995
7	2248	2247	2246	1	2	0.999	1.000
8	2556	2470	2394	76	162	0.937	0.969
9	3272	3204	3153	51	119	0.964	0.984
10	3657	3646	3636	10	21	0.994	0.997
Average value						0.983	0.991