Graphic Representations and Frequency Parameters of Heart Sound Signals

Abstract

Sounds produced by acoustic activity of the heart are series (sequences) of quasi-periodic events which are repeated throughout life, one period (cycle) of these events lasts less than one second. The advancements in technology have enabled us to create various tools for audio and graphic representations of these events. Physicians, by using such tools, can more accurately determine diagnosis by interpretation of heart sound and/or by visual interpretation of graphic displays of heart sounds. This paper presents frequency parameters and graphic illustrations of heart sound signals for two groups of heart murmurs: innocent Still's murmur and pathologic heart murmur of Ventricular Septal Defect (VSD). Also, on behalf of the frequency analysis of acoustic cardiac signals with Still's murmur was given a medical explanation of cause and origin of Still's murmur.

Preliminary Diagnosis of Coronary Artery Disease from Human Heart Sounds: A Signal Processing Prospective

“…The detection of coronary artery diseases from heart sounds is quite a popular topic among researchers during the last decade. The philosophy behind this work traces back to 1967 [10], but due to non-availability of congruous technology, gamut research could not be performed at that time. The underlying theoretical foundations could be found in [10,24].…”

“…The philosophy behind this work traces back to 1967 [10], but due to non-availability of congruous technology, gamut research could not be performed at that time. The underlying theoretical foundations could be found in [10,24]. There are in fact, very few researchers, who are currently working towards the analysis of heart sounds for detection CAD with the avail of the electronic stethoscope.…”