Backpropagation Artificial Neural Network Classifier to Detect Changes in Heart Sound due to Mitral Valve Regurgitation

Authors:
Rakesh Kumar Sinha;Yogender Aggarwal;Barda Nand Das
Affiliations:
Department of Biomedical Instrumentation, Birla Institute of Technology, Mesra, Ranchi, India 835215;Department of Electrical and Electronics Engineering, Birla Institute of Technology, Mesra, Ranchi, India 835215;Department of Biomedical Instrumentation, Birla Institute of Technology, Mesra, Ranchi, India 835215
Venue:
Journal of Medical Systems
Year:
2007

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Abstract

The phonocardiograph (PCG) can provide a non-invasive diagnostic ability to the clinicians and technicians to compare the heart acoustic signal obtained from normal and that of pathological heart (cardiac patient). This instrument was connected to the computer through the analog to digital (A/D) converter. The digital data stored for the normal and diseased (mitral valve regurgitation) heart in the computer were decomposed through the Coifman 4th order wavelet kernel. The decomposed phonocardiographic (PCG) data were tested by backpropagation artificial neural network (ANN). The network was containing 64 nodes in the input layer, weighted from the decomposed components of the PCG in the input layer, 16 nodes in the hidden layer and an output node. The ANN was found effective in differentiating the wavelet components of the PCG from mitral valve regurgitation confirmed person (93%) to normal subjects (98%) with an overall performance of 95.5%. This system can also be used to detect the defects in cardiac valves especially, and other several cardiac disorders in general.