NDLI: The aortic valve dynamics role in the recovery treatments of patients with left ventricular assist devices

Content Provider	IEEE Xplore Digital Library
Author	Faragallah, G. Yu Wang Divo, E. Simaan, M.
Copyright Year	2011
Description	Author affiliation: College of Technology, Daytona State College, Daytona Beach, FL 32117 (Divo, E.) \|\| Department of Electrical Engineering and Computer Science, University of Central Florida, Orlando, FL 32816 (Faragallah, G.; Yu Wang; Simaan, M.)
Abstract	This paper intends to define an optimal range for the pump speed of Rotary Left Ventricular Assist Devices (LVADs) that are used in bridge-to-recovery treatments. If the pump is operating within that optimal range, the aortic valve will be working properly (i.e. opening and closing) in each cardiac cycle. The proper operation of the aortic valve is a very important factor in helping the heart muscle recovers. The optimal range varies depending on the severity of the Heart Failure (HF) and the level of activity of the patient. A comparison is shown between the total flow produced as a result of operating the pump within the optimal range and the physiological demand of the patient. The comparison suggests that for cases of mild to moderate HF the flow produced is close to the physiological demand, but in severe cases the flow is significantly less than what the patient requires. Furthermore, our results suggest that data from the pump flow and the left ventricle volume signals can be used to test whether or not the aortic valve is experiencing permanent closure. Also an investigation of the aortic valve opening duration is presented for two cases: first, for mild HF case with varying Heart Rate (HR) and then for fixed HR and mild to severe HF cases. These Simulation results are obtained using a $6^{th}$ order mathematical model of the cardiovascular-LVAD system.
Starting Page	1339
Ending Page	1342
File Size	525447
Page Count	4
File Format	PDF
ISBN	9781424441211
ISSN	1557170X
e-ISBN	9781457715891
e-ISBN	9781424441228
DOI	10.1109/IEMBS.2011.6090315
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2011-08-30
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Valves Hafnium Physiology Integrated circuit modeling Heart rate Blood
Content Type	Text
Resource Type	Article
Subject	Signal Processing Biomedical Engineering Health Informatics Computer Vision and Pattern Recognition

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