TY - JOUR
T1 - Special treatments for valve/hole regions in endocardial potential estimates from non-contact intracavitary probes
AU - Olson, Lorraine G.
AU - Throne, Robert D.
AU - Windle, John R.
AU - Schweitzer, Jeffrey A.
AU - Voth, Eric J.
PY - 2006/4
Y1 - 2006/4
N2 - The EnSite™ intracavitary probe system developed by Endocardial Solutions, Inc (St. Jude Medical, St. Paul, MN) was used to simultaneously record geometric information, probe potentials, and endocardial potentials within the right atria for four patients. First-order Tikhonov regularization was then used to estimate endocardial potentials from the probe potentials for each patient at each endocardial site, and relative errors and correlation coefficients between the estimates and measured data were computed. Next, three treatments for valve/hole regions of the heart were examined to determine whether they were able to improve the endocardial potential estimates outside the valve/hole regions: ∂φ/∂n = 0, c ∂φ/∂n = φ, and infinite elements. The correlation coefficients and relative errors for the estimates with the special treatments were extremely close to (and sometimes slightly worse than) the estimates without any special treatments, for all four patients.
AB - The EnSite™ intracavitary probe system developed by Endocardial Solutions, Inc (St. Jude Medical, St. Paul, MN) was used to simultaneously record geometric information, probe potentials, and endocardial potentials within the right atria for four patients. First-order Tikhonov regularization was then used to estimate endocardial potentials from the probe potentials for each patient at each endocardial site, and relative errors and correlation coefficients between the estimates and measured data were computed. Next, three treatments for valve/hole regions of the heart were examined to determine whether they were able to improve the endocardial potential estimates outside the valve/hole regions: ∂φ/∂n = 0, c ∂φ/∂n = φ, and infinite elements. The correlation coefficients and relative errors for the estimates with the special treatments were extremely close to (and sometimes slightly worse than) the estimates without any special treatments, for all four patients.
KW - Intracavitary probe
KW - Inverse electrocardiography
KW - Tikhonov regularization
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M3 - Article
C2 - 16817645
AN - SCOPUS:70449094332
VL - 42
SP - 422
EP - 427
JO - Biomedical Sciences Instrumentation
JF - Biomedical Sciences Instrumentation
SN - 0067-8856
ER -