title: Noninvasive detection of mechanical prosthetic heart valve disorder.
abstract: Auscultation is a widely used efficient technique by cardiologists for detecting the heart conditions. Since the mechanical prosthetic heart valves are widely used today, it is important to develop a simple and efficient method to detect abnormal mechanical valves. In this paper, the mechanical prosthetic heart valve sounds are analyzed by using different power spectral density (PSD) estimation techniques. To improve the classification accuracy of heart sounds, we propose two different feature extraction schemes, i.e., a modified local discriminant bases (LDB) scheme and a Hilbert-Huang Transform (HHT)-based scheme. A database of 150 heart sounds is used in this study and an average classification accuracy of 97.3% is achieved for both the two feature extraction schemes, when a generic linear discriminant analysis (LDA) classifier is used in the classification stage.
authors: School of Information Engineering, Guangdong Medical College, Dongguan, China. haihaiwenqi@163.com
authors: Di
authors: D
authors: Zhang
authors: Jiazhong
authors: J
authors: He
authors: Jianping
authors: J
authors: Yao
authors: Yuequan
authors: Y
authors: Wu
authors: Minghui
authors: M
authors: Du
mesh_terms: D000465:Algorithms; D016208:Databases, Factual; D016002:Discriminant Analysis; D005583:Fourier Analysis; D006347:Heart Sounds / Q000502:physiology*; D006350:Heart Valve Prosthesis; D006801:Humans; D012815:Signal Processing, Computer-Assisted; D059629:Signal-To-Noise Ratio; D013057:Spectrum Analysis