Graphical representation of heart sounds and murmurs

Author

Tovar-Corona, B. ; Torry, JN

Author_Institution

Sch. of Eng., Sussex Univ., Brighton, UK

fYear

1997

fDate

7-10 Sep 1997

Firstpage

101

Lastpage

104

Abstract

Presents a new method to represent heart sounds and murmurs in stylised diagrams. Frequency domain analysis, based on an Auto Regressive modelling, shows its superiority against time domain analysis in the identification of the principle sounds (SI and S2), extra-sounds (S3 and S4) and murmurs. Two separated diagrams give information in the time and frequency domain in order to make a simple representation. The analysis begins by identifying individual cardiac cycles. Then S1, S2, extra-sounds and murmurs are segmented using spectral estimation. Finally the cycle with the loudest murmur is identified to represent two final diagrams showing its shape in time and frequency content

Keywords

acoustic signal processing; bioacoustics; cardiology; frequency-domain analysis; graphs; medical signal processing; time-domain analysis; autoregressive modelling; cardiac auscultation; extra-sounds; graphical representation; heart sounds; medical diagnostic technique; murmurs; principle sounds identification; spectral estimation; stylised diagrams; Acoustic testing; Acoustical engineering; Auditory system; Frequency domain analysis; Graphics; Heart; Hospitals; Mathematical model; Shape; Time domain analysis;

fLanguage

English

Publisher

ieee

Conference_Titel

Computers in Cardiology 1997

Conference_Location

Lund

ISSN

0276-6547

Print_ISBN

0-7803-4445-6

Type

conf

DOI

10.1109/CIC.1997.647840

Filename

647840