Spectral analysis of closing sounds produced by Ionescu-Shiley bioprosthetic aortic heart valves. Part 1. Optimal number of poles and zeros for parametric spectral analysis.
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D001021:Aortic Valve; D001705:Bioprosthesis; D006350:Heart Valve Prosthesis; D006801:Humans; D010701:Phonocardiography / Q000379:methods*; D011475:Prosthesis Failure