Akay, Metin2016-08-202016-08-20August 2012014-08http://hdl.handle.net/10657/1441More than 380,000 Americans die every year from coronary artery disease (CAD). Early detection and treatment are crucial to reducing this number. Current diagnostic methods are invasive, costly, and time-consuming. Using an electronic stethoscope and spectral analysis of the recorded heart sound, we investigated the acoustic signature of CAD in subjects with only a single coronary occlusion before and after stent placement as well as subjects with clinically normal coronary arteries. The power ratio of the total power above 150Hz over the total power below 150Hz of the FFT of the acoustic signal was used to evaluate the effectiveness of stent placement. The groups were identified with this method with an 82% sensitivity and specificity. Power ratios after stent placement are not statistically different than those estimated from subjects with no coronary occlusions. Our approach demonstrates that the effectiveness of stent placement can be monitored using an electronic stethoscope.application/pdfengThe author of this work is the copyright owner. UH Libraries and the Texas Digital Library have their permission to store and provide access to this work. Further transmission, reproduction, or presentation of this work is prohibited except with permission of the author(s).Acoustic signatureCoronary artery diseaseElectronic stethoscopeFast Fourier transform2016-08-20Thesisborn digital