An automatic segmentation method for heart sounds

Table 1 Statistics of SMR

UMich no.	Heart sound types	Length (s)	Cycle number	SMR _A /db	SMR_WPT/db	SMR₂₀₀/db	SMR_Ori/db
6	Early Systolic Murmur, Apex	60	66	24.24	22.91	15.52	14.60
7	Mid Systolic Murmur, Apex	67	72	28.34	25.37	22.01	12.51
8	Late Systolic Murmur, Apex	61	63	30.27	28.93	29.16	21.64
9	Holosystolic Murmur, Apex	60	63	24.26	22.20	21.96	16.07
4	Mid Systolic Click, Apex	60	72	25.12	22.25	19.50	19.14
10	Systolic Click and Late Systolic Murmur, Apex	64	72	29.03	26.35	24.18	23.23
11	S4 and Mid Systolic Murmur, Apex	65	72	34.35	28.18	28.93	17.06
12	S3 and Holosystolic Murmur, Apex	64	87	27.63	26.35	26.77	16.09
16	Early Diastolic Murmur, Aortic	61	81	32.12	31.92	31.88	31.37
21	Ejection Systolic Murmur and Transient Split S2, Pulmonic	56	75	26.41	23.68	21.33	20.47
22	Split S2 and Ejection Systolic Murmur, Pulmonic	66	78	18.07	14.46	12.52	11.26
23	Ejection Systolic Murmur and Single S2 and Ejection Click, Pulmonic	75	87	24.30	20.20	21.96	16.07
Arithmetic average ± SD				26.95 ± 4.30	24.42 ± 4.54	22.61 ± 5.86	18.35 ± 5.41
Weighted average ± SD				26.92 ± 4.14	24.38 ± 4.43	22.61 ± 5.67	18.39 ± 5.29

The italic values are represent the optimal results, compared with the results achieved in other methods/studies

ISSN: 1475-925X