Myocardial contractility: A seismocardiography approach

Author

Tavakolian, Kouhyar ; Portacio, G. ; Tamddondoust, N.R. ; Jahns, G. ; Ngai, B. ; Dumont, Guy A. ; Blaber, Andrew

Author_Institution

Dept. of Electr. & Comput. Eng., Univ. of British Columbia, Vancouver, BC, Canada

fYear

2012

fDate

Aug. 28 2012-Sept. 1 2012

Firstpage

3801

Lastpage

3804

Abstract

Features are extracted from seismocardiogram data to correlate with two indexes of myocardial contractility: dP/dt_max (maximum first derivative of left ventricular pressure) and stroke volume. In the first study on three pigs, it is shown that the time period between the R peak of the ECG and the first peak of the SCG (R-AO period or pre-ejection period, PEP) correlated (r= -0.86) with dP/dt_max. In the second study, stroke volume is gradually reduced in five human subjects using lower body negative pressure. The same feature as the pigs (R-AO) is correlated the most with stroke volume (r= -0.90).

Keywords

electrocardiography; feature extraction; medical disorders; medical signal processing; pressure measurement; volume measurement; ECG; R-AO period; feature extraction; left ventricular pressure; lower body negative pressure measurement; myocardial contractility; pigs; preejection period; seismocardiography approach; stroke volume measurement; Electrocardiography; Feature extraction; Heart rate; Humans; Myocardium; Timing; dP/dtmax; lower body negative pressure (LBNP); pre-ejection period (PEP); stroke volume; Adult; Animals; Female; Heart; Heart Rate; Humans; Male; Monitoring, Physiologic; Myocardial Contraction; Signal Processing, Computer-Assisted; Stroke Volume; Sus scrofa;

fLanguage

English

Publisher

ieee

Conference_Titel

Engineering in Medicine and Biology Society (EMBC), 2012 Annual International Conference of the IEEE

Conference_Location

San Diego, CA

ISSN

1557-170X

Print_ISBN

978-1-4244-4119-8

Electronic_ISBN

1557-170X

Type

conf

DOI

10.1109/EMBC.2012.6346795

Filename

6346795