NDLI: A comparison of measured and calculated intracavitary potentials for electrical stimuli in the exposed dog heart

Content Provider	IEEE Xplore Digital Library
Author	Derfus, D.L. Pilkington, T.C. Simpson, E.W. Ideker, R.E.
Copyright Year	1964
Description	The feasibility of using a multielectrode, intracavitary probe to solve a forward problem in which measured intracavitary potentials are compared to those calculated from subendocardial potentials and left ventricular (LV) cavity geometry is tested. Intracavitary potentials and subendocardial potentials are measured simultaneously during electrical pacing stimuli from the LV apex, LV anterior base, LV posterior base, and right ventricular (RV) outflow tract. The LV cavity geometry is measured from postmortem magnetic resonance microscopy images of fixed hearts. The results indicate that for electrical pacing from the apex, intracavity stimulus potentials can be calculated with a high degree of accuracy. For nonapical pacing locations, the accuracy decreases since the calculations are more sensitive to errors in measuring probe position and LV cavity geometry near the septum. These results show that accurate geometric measurements of the intracavitary probe position and subendocardial surface are primary concerns.<>
Sponsorship	IEEE Engineering in Medicine and Biology Society
Page Count	15
File Size	1547802
Starting Page	1192
Ending Page	1206
File Format	PDF
ISSN	00189294
Volume Number	39
Issue Number	11
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1992-11-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Electric variables measurement Electric potential Probes Inverse problems Heart Biomedical measurements Testing Geometry Position measurement Conductors
Content Type	Text
Resource Type	Article
Subject	Biomedical Engineering

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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