A Comparison of Measured Epicardial Potentials with Epicardial Potentials Computed from Body Surface Measurements in the Intact Dog1

2015 ◽  
pp. 19-22 ◽  
Author(s):  
Roger C. Barr ◽  
Madison S. Spach
Keyword(s):  
Body Surface ◽  
Epicardial Potentials ◽  
Surface Measurements

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
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