PCG Classification Using Multidomain Features and SVM Classifier

Table 2

Summary of normalized amplitude features.

Feature index	Feature name	Physical meaning
1	m_Amp_SysS1	mean value of the ratio of the mean absolute amplitude during systole to that during S1 in each heart beat
2	sd_Amp_SysS1	SD of m_Amp_SysS1
3	m_Amp_DiaS2	mean value of the ratio of the mean absolute amplitude during diastole to that during S2 in each heart beat
4	sd_Amp_DiaS2	SD of m_Amp_DiaS2
5	m_Amp_S1S2	mean value of the ratio of the mean absolute amplitude during S1 to that during S2 in each heart beat
6	sd_Amp_S1S2	SD of m_Amp_S1S2
7	m_Amp_S1Dia	mean value of the ratio of the mean absolute amplitude during S1 to that during diastole in each heart beat
8	sd_Amp_S1Dia	SD of m_Amp_S1Dia
9	m_Amp_SysDia	mean value of the ratio of the mean absolute amplitude during systole to that during diastole in each heart beat
10	sd_Amp_SysDia	SD of m_Amp_SysDia
11	m_Amp_S2Sys	mean value of the ratio of the mean absolute amplitude during S2 to that during systole in each heart beat
12	sd_Amp_S2Sys	SD of m_Amp_S2Sys