In vivo measurements of heat transfer on the endocardial surface

A catheter-based instrument was used to measure the heat transfer on the right atrial and ventricular endocardial surfaces of two pigs in vivo. The heat transfer parameters will assist in calculating the proper dose for radio-frequency ablation. The time constant of the device was 0.05 s. It was fou...

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Bibliographic Details
Published in:Physiological measurement 2003-08, Vol.24 (3), p.793-804
Main Authors: Santos, Icaro dos, Will, J A, Rocha, Adson Ferreira da, Nascimento, Francisco Assis de O, Webster, John G, Valvano, Jonathan W
Format: Article
Language:English
Subjects:
Animals
Body Temperature - physiology
Catheter Ablation
Catheterization, Swan-Ganz
Endocardium - physiology
Models, Biological
Swine
Thermal Conductivity
Thermography - methods
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Summary:A catheter-based instrument was used to measure the heat transfer on the right atrial and ventricular endocardial surfaces of two pigs in vivo. The heat transfer parameters will assist in calculating the proper dose for radio-frequency ablation. The time constant of the device was 0.05 s. It was found that the average heat convection coefficient varies significantly both spatially and temporally on the endocardium. The average heat convection coefficients found were between 510 and 4800 W m(-2) K(-1).
ISSN:0967-3334
1361-6579
DOI:10.1088/0967-3334/24/3/314