Interpretation of Heart Sound Signal through Automated Artifact-Free Segmentation
Journal Title: Heart Research – Open Journal - Year 2015, Vol 2, Issue 1
Abstract
Purpose: Digital recording of heart sounds commonly known as Phonocardiogram (PCG) signal, is a convenient primary diagnostic tool for analyzing condition of heart. Phonocardiogram aids physicians to visualize the acoustic energies that results from mechanical aspect of cardiac activity. PCG signal cycle segmentation is an essential processing step towards heart sound signal analysis. Sound artifacts due to inappropriate placement of stethoscope, body movement, cough etc. makes segmentation difficult. Artifact-free segmented heart sound cycles are convenient for physicians to interpret and it is also useful for computerized automated classification of abnormality. Methods: We have developed a framework which selects good quality heart sound subsequences which are artifact-free and reused the features involved in this processing in segmentation. In this work, we have used information contained in frequency subbands by decomposing the signal using Discrete Wavelet Packet Transform (DWPT). The algorithm identifies the parts of the signal where artifacts are prominent and it also detects major events in heart sound cycles. Results: The algorithm shows good results when tested on normal and five commonly occurring pathological heart sound signals. An average accuracy of 93.71% is registered for artifactfree subsequence selection process. The cycle segmentation algorithm gives an accuracy of 98.36%, 98.18% and 93.97% respectively for three databases used in the experiment. Conclusions: The work provides a solution for artifact-free segmentation of heart sound cycles to assist interpretation of heart sound by physicians in objective analysis through recording in a computer. It is also useful for development of an automated decision support system on heart sound abnormality
Authors and Affiliations
Goutam Saha
Keywords
Related Articles
- EP ID EP556754
- DOI 10.17140/HROJ-2-105
- Views 142
- Downloads 0
Dimethyl Sulfoxide Reduces Microvascular Obstruction and Intramyocardial Hemorrhage in a Porcine Ischemia-Reperfusion Model
Background: Microvascular obstruction (MVO) and Intramyocardial hemorrhage (IMH) are associated with myocardial reperfusion injury and recognized as predictors of adverse left ventricular remodeling in acute myocardial i...
Saddle Thrombus seen on Transthoracic Echo: A Rare Feature in Pulmonary Embolism
The Saddle thrombus is a rare condition characterized by presence of a large thrombus which straddles the main pulmonary arterial trunk and its bifurcation leading to acute massive Pulmonary Embolism (PE). Its incidence...
Clinical Spectrum of Pediatric Optic Neuritis in Indian Children
Purpose: To study the clinical spectrum of pediatric optic neuritis in Indian children at a tertiary care centre. Methods: A retrospective study of patients diagnosed with optic neuritis below 20 years of age at a tertia...
Primary Angioplasty Using a Renal Stent in a Severly Ectactic and Occluded Left Anterior Descending Coronary Artery
Revascularization of ectatic coronary arteries in the setting of acute myocardial infarction poses great challenges for the operator. We report a case, where a peripheral renal stent was used successfully to treat the cl...
Less is More: Benefit of Achieving Very Low Low-Density Lipoprotein-Cholesterol Levels on Cardiovascular Events
Low-density lipoprotein-cholesterol (LDL-C) reduction with statin therapy is one of the most pivotal interventions for atherosclerotic cardiovascular disease (ASCVD) prevention and treatment. The risk of coronary artery...