[Retracted] Improvement of the Accuracy in the Identification of Coronary Artery Disease Combining Heart Sound Features

Table 2

The relationship between heart sound characteristics and CAD or non-CAD.

No.	Source	Recordings	(V2·s)	(V2·s)	M1 (Hz)	T1 (Hz)	P3	Is it CAD?	Note
1	SCDB	40 cardiac cycles			28	6	19.3	Yes	50% coronary blockage
2	SCDB	40 cardiac cycles			19	4	25.14	Yes	60% coronary blockage
3	MHSDB	40 cardiac cycles			39	10	16.19	No	Normal
4	SCDB	40 cardiac cycles			22	8	10.17	Yes	90% coronary blockage
5	SCDB	40 cardiac cycles			27	6	62.46	Yes	Multiple coronary blockages
6	SCDB	40 cardiac cycles			23	4	8.96	Yes	50% coronary blockage
7	SCDB	40 cardiac cycles			46	6	9.98	Yes	90% coronary blockage
8	MHSDB	40 cardiac cycles			47	22	7.38	No	Mitral stenosis
9	MHSDB	40 cardiac cycles	0	0	51	13	0.92	No	Late diastolic valve murmurs
10	SCDB	40 cardiac cycles			18	4	48.16	Yes	Multiple coronary blockages
11	MHSDB	40 cardiac cycles			21	7	0.86	No	Early and late valve diastolic murmurs
12	SCDB	40 cardiac cycles			60	21	1.35	No	Normal