Assessing Systolic Time-Intervals from Heart Sound: A Feasibility Study

Author

Carvalho, P. ; Paiva, R.P. ; Couceiro, R. ; Henriques, J. ; Quintal, I. ; Muehlsteff, J. ; Aubert, X.L. ; Antunes, M.

Author_Institution

Dept. of Inf. Eng., Univ. of Coimbra, Coimbra, Portugal

fYear

2009

fDate

3-6 Sept. 2009

Firstpage

3124

Lastpage

3128

Abstract

Systolic time intervals are highly correlated to fundamental cardiac functions. In this paper we investigate the feasibility of using heart sound (HS) to accurately measure the opening and closing moments of the aortic valve, since these are crucial moments to define the main systolic timings of the heart cycle, i.e. the pre-ejection period (PEP) and the left ventricular ejection time (LVET). We introduce a HS model, which is applied to define several features that provide clear markers to identify these moments in the HS. Using these features and a comparative analysis with registered echocardiographies from 17 subjects, the results achieved in this study suggest that HS can be used to accurately estimate LVET and PEP.

Keywords

bioacoustics; cardiovascular system; echocardiography; haemodynamics; physiological models; aortic valve; echocardiography; fundamental cardiac functions; heart sound model; left ventricular ejection time; pre-ejection period; systolic time-interval assessment; Adult; Algorithms; Aortic Valve; Biomedical Engineering; Echocardiography, Doppler; Feasibility Studies; Female; Heart; Heart Sounds; Humans; Male; Models, Statistical; Myocardial Contraction; Systole;

fLanguage

English

Publisher

ieee

Conference_Titel

Engineering in Medicine and Biology Society, 2009. EMBC 2009. Annual International Conference of the IEEE

Conference_Location

Minneapolis, MN

ISSN

1557-170X

Print_ISBN

978-1-4244-3296-7

Electronic_ISBN

1557-170X

Type

conf

DOI

10.1109/IEMBS.2009.5332565

Filename

5332565