PCG Classification Using Multidomain Features and SVM Classifier

Table 1

Summary of time-domain features.

Feature index	Feature name	Physical meaning
1	m_RR	mean value of RR intervals
2	sd_RR	standard deviation (SD) of RR intervals
3	m_IntS1	mean value of S1 intervals
4	sd_IntS1	SD of S1 intervals
5	m_IntS2	mean value of S2 intervals
6	sd_IntS2	SD of S2 intervals
7	m_IntSys	mean value of systolic intervals
8	sd_IntSys	SD of systolic intervals
9	m_IntDia	mean value of diastolic intervals
10	sd_IntDia	SD of diastolic intervals
11	m_Ratio_SysRR	mean value of the ratio of systolic interval to RR interval of each heart beat
12	sd_Ratio_SysRR	SD of the ratio of systolic interval to RR interval of each heart beat
13	m_Ratio_DiaRR	mean value of the ratio of diastolic interval to RR interval of each heart beat
14	sd_Ratio_DiaRR	SD of the ratio of diastolic interval to RR interval of each heart beat
15	m_Ratio_SysDia	mean value of the ratio of systolic to diastolic interval of each heart beat
16	sd_Ratio_SysDia	SD of the ratio of systolic to diastolic interval of each heart beat
17	m_Ratio_S1RR	mean value of the ratio of S1 interval to RR interval of each heart beat
18	sd_Ratio_S1RR	SD of the ratio of S1 interval to RR interval of each heart beat
19	m_Ratio_S2RR	mean value of the ratio of S2 interval to RR interval of each heart beat
20	sd_Ratio_S2RR	SD of the ratio of S2 interval to RR interval of each heart beat

Note: means the new added features in this study.