HEART MURMUR DIAGNOSTIC SYSTEM (HMDS)

摘要

Many heart diseases cause changes in heart sounds and additionalrnmurmurs before other signs and symptoms appear.rnHeart sound auscultation is the primary test conducted byrngeneral practitioner (GP) . A heart murmur is an abnormal,rnextra sound during the heartbeat cycle made by blood flowingrnthrough the heart and its valves. Murmurs are characterizedrnby their timing, intensity, pitch, shape and location.rnTiming refers to whether the murmur occurs during systole,rndiastole or is continuous throughout the cardiac cycle.rnThis paper describes the diagnosis of heart sounds andrnheart murmurs using stethoscope based on MFCC-HMM.rnDiagnosing heart sounds depends on the experience andrntraining of the General Practitioner. Echocardiography isrnthe gold standard alternative for diagnosing heart diseases.rnEven though it provides a more definitive diagnosis in thisrnrespect, it is expensive and not widely available throughoutrnMalaysia especially in local hospitals.For the classificationrnbased on the HMM, the continuous cyclic heart sound signalrnneeds to be automatically segmented to obtain isolatedrncycles of the signal. The ECG signal characteristic of the Rrnto R point is used to determine every one minute cyclesofrnboth ECG and heart sound data. The experiment includesrnvarying the number of states and a number of mixtures.rnIn the classification experiments, the proposed method performedrnsuccessfully with an accuracy of about 98.9% withrn5 states,16 gaussion model