An Inverse Spectral Method to Localize Discordant Alternans Regions on the Heart from Body Surface Measurements

2013 ◽  
pp. 241-248 ◽  
Author(s):  
Jaume Coll-Font ◽  
Burak Erem ◽  
Alain Karma ◽  
Dana H. Brooks
Keyword(s):  
Spectral Method ◽  
Body Surface ◽  
Surface Measurements ◽  
Inverse Spectral Method ◽  
Inverse Spectral

Hardy functions and the inverse spectral method

1983 ◽  
Vol 8 (13) ◽  
pp. 1455-1474 ◽  
Author(s):  
V. Guillemin ◽  
A. Uribe
Keyword(s):  
Spectral Method ◽  
Inverse Spectral Method ◽  
Inverse Spectral

Estimates of ventilation from body surface measurements in unrestrained subjects

1986 ◽  
Vol 61 (3) ◽  
pp. 1114-1119 ◽  
Author(s):  
F. D. McCool ◽  
K. B. Kelly ◽  
S. H. Loring ◽  
I. A. Greaves ◽  
J. Mead
Keyword(s):  
Linear Regression ◽  
Tidal Volume ◽  
Multiple Linear Regression ◽  
Body Surface ◽  
Cross Sectional Area ◽  
Axial Displacement ◽  
Sectional Area ◽  
Cross Sectional ◽  
Linear Dimensions ◽  
Surface Measurements

To make estimates of ventilation from measurements of body surface movements in unrestrained subjects, we measured changes in linear dimensions and cross-sectional areas of the rib cage (RC) and abdomen (AB) of six healthy unrestrained subjects during a variety of maneuvers. RC and AB anteroposterior diameters and abdominal length in the cephalocaudal axis (axial displacement) were measured with magnetometers, and RC and AB cross-sectional areas were measured with a respiratory inductance plethysmograph. Flow was measured at the mouth with a pneumotachograph and integrated electrically to give volume. Volume and body surface measurements were analyzed by multiple linear regression. Addition of the axial measurements to either the anteroposterior dimensions or cross-sectional areas of RC and AB improved estimates of tidal volume in all subjects (P less than 0.01). With measurements of axial displacement and cross-sectional area of the RC and AB, tidal volume could be reliably estimated to within 20% of actual ventilation. We conclude that measurement of axial displacements improves estimates of ventilation in unrestrained subjects.

Determination of the locus of the heart vector from body surface measurements: Model experiments

1975 ◽  
Vol 8 (2) ◽  
pp. 135-146 ◽  
Author(s):  
Clifford V. Nelson ◽  
Brian C. Hodgkin ◽  
Panagiotis C. Voukydis
Keyword(s):  
Body Surface ◽  
Model Experiments ◽  
Surface Measurements

Body-Surface Measurements of Mule Deer and Elk

1987 ◽  
Vol 51 (3) ◽  
pp. 630 ◽  
Author(s):  
Katherine L. Parker
Keyword(s):  
Body Surface ◽  
Mule Deer ◽  
Surface Measurements

The Cauchy problem for the Kadomtsev–Petviashvili–I equation without the zero mass constraint

1999 ◽  
Vol 125 (1) ◽  
pp. 113-138 ◽  
Author(s):  
A. S. FOKAS ◽  
LI-YENG SUNG
Keyword(s):  
Cauchy Problem ◽  
Initial Data ◽  
Spectral Method ◽  
Zero Mass ◽  
Schwartz Functions ◽  
Mass Constraint ◽  
The Cauchy Problem ◽  
Inverse Spectral Method ◽  
Existence And Regularity Results ◽  
Regularity Results

Existence and regularity results are obtained for the Cauchy problem for the Kadomtsev–Petviashvili–I equation by the inverse spectral method. The initial data are small Schwartz functions which are not assumed to satisfy the zero mass constraint ∫ℝdxq(x, y, 0)=0.

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