DocumentCode :
3167541
Title :
Pacing Real-Time Spatiotemporal Control of Cardiac Alternans
Author :
Lin, Shien-Fong ; Dubljevic, Stevan
Author_Institution :
Univ. of California Los Angeles, Los Angeles
fYear :
2007
fDate :
9-13 July 2007
Firstpage :
600
Lastpage :
606
Abstract :
This work demonstrates real-time control of cardiac alternans in the extracted rabbit heart and provides an analysis of the control methodology applied in the case of a one dimensional (ID) cable of cardiac cells. The realtime applied control is realized through feedback by proportional perturbation of a basic pacing cycle length (PCL). Measurements of the electric wave propagation are obtained by optical mapping of fluorescent dye from the surface of the heart and fed back in the custom designed software that provides the control input signal, which perturbs the basic pacing cycle length. In addition, a novel pacing protocol that avoids conduction block is applied. A complementary numerical analysis to the experiment is given by dimensionally reduced ionic model of the ID cable of cardiac cells under the self-referencing feedback protocol, which is identical to the one applied in the experimental study. In addition, the amplitude of alternans linear parabolic PDE with gain full state feedback control associated with the ionic ID cardiac cell cable model is explored and analyzed. The analysis of stabilization of the amplitude of alternans PDE is in an agreement with experimental results obtained and numerical results produced by the ionic ID cable of cardiac cells model.
Keywords :
biocontrol; cardiology; parabolic equations; partial differential equations; state feedback; wave propagation; cardiac alternans; cardiac cells; electric wave propagation; linear parabolic PDE; numerical analysis; pacing cycle length; rabbit heart; real-time spatiotemporal control; self-referencing feedback protocol; state feedback control; Electric variables measurement; Heart; Length measurement; Optical feedback; Optical propagation; Proportional control; Protocols; Rabbits; Software measurement; Spatiotemporal phenomena; Action Potential Propagation; Cardiac Alternans; Dissipative Parabolic PDEs; Real Time Pacing Protocols;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
American Control Conference, 2007. ACC '07
Conference_Location :
New York, NY
ISSN :
0743-1619
Print_ISBN :
1-4244-0988-8
Electronic_ISBN :
0743-1619
Type :
conf
DOI :
10.1109/ACC.2007.4282654
Filename :
4282654
Link To Document :
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