title: [Time-varying spectral analysis of cardiac murmurs].
abstract: In this paper, the cardiac murmurs (systolic murmurs, diastolic murmurs and machining murmurs) are classified by hemodynamics and studied by time-frequency analysis. We get the time-varying spectrum of the signals. The results, which are from the different kinds of murmurs in 28 patients with heart disease, show that the time-varying spectrum based on cone-shaped kernel distribution are capable to correctly represent the power density and dynamic course of the series in time-frequency domain. The method has high time-frequency resolution, and the time-varying spectrum of each murmur has its characteristics.
authors.affiliation: Xian Jiaotong University.
authors.forename: Y
authors.initials: Y
authors.lastname: Wang
authors.forename: H
authors.initials: H
authors.lastname: Wang
authors.forename: J
authors.initials: J
authors.lastname: Cheng
mesh_terms: D004594:Electrophysiology; D006337:Heart Murmurs / Q000145:classification / Q000503:physiopathology*; D006347:Heart Sounds / Q000502:physiology; D006801:Humans; D013057:Spectrum Analysis / Q000379:methods