Optimal adjustment of the atrio-aortic left ventricular assist device (AA-LVAD)

Author

Pilla, James J. ; Drzewiecki, G.M. ; Welkowitz, Walter

Author_Institution

Dept. of Biomed. Eng., Rutgers Univ., Piscataway, NJ, USA

fYear

1989

fDate

27-28 Mar 1989

Firstpage

69

Lastpage

70

Abstract

The authors document a protocol for optimal timing of the LVAD based on reduced heart oxygen consumption. Timing is studied using a closed-loop analog model of the heart, vascular system, and the LVAD. Results indicate that the pump should begin ejection immediately after the close of the aortic valve and that the pump filling pressure should pump set to a value which produces maximum filling of the pump and maximum ventricular unloading. The optimization of the pump ejection pressure is a trade-off between left-ventricular O₂ and stroke volume and mean arterial pressure

Keywords

artificial organs; cardiology; optimisation; aortic valve; atrio-aortic left ventricular assist device; closed-loop analog model; ejection; heart O₂ consumption; mean arterial pressure; optimal adjustment; pump filling pressure; stroke volume; vascular system; Biomedical engineering; Blood pressure; Cardiology; Cardiovascular system; Circuits; Filling; Heart; Protocols; Timing; Valves;

fLanguage

English

Publisher

ieee

Conference_Titel

Bioengineering Conference, 1989., Proceedings of the 1989 Fifteenth Annual Northeast

Conference_Location

Boston, MA

Type

conf

DOI

10.1109/NEBC.1989.36702

Filename

36702