In vivo measurement of swine endocardial convective heat transfer coefficient

Author

Tangwongsan, Chanchana ; Will, James A. ; Webster, John G. ; Meredith, Kenneth L., Jr. ; Mahvi, David M.

Author_Institution

Dept. of Electr. Eng., Chulalongkorn Univ., Bangkok, Thailand

Volume

51

Issue

8

fYear

2004

Firstpage

1478

Lastpage

1486

Abstract

We measured the endocardial convective heat transfer coefficient h at 22 locations in the cardiac chambers of 15 pigs in vivo. A thin-film Pt catheter tip sensor in a Wheatstonebridge circuit, similar to a hot wire/film anemometer, measured h. Using fluoroscopy, we could precisely locate the steerable catheter sensor tip and sensor orientation in pigs´ cardiac chambers. With flows, h varies from 2500 to 9500 W/m²·K. With zero flow, h is approximately 2400 W/m²·K. These values of h can be used for the finite element method modeling of radiofrequency cardiac catheter ablation.

Keywords

biothermics; cardiology; catheters; convection; diagnostic radiography; Wheatstonebridge circuit; finite element method; fluoroscopy; in vivo measurement; pig cardiac chambers; radiofrequency cardiac catheter ablation; sensor orientation; swine endocardial convective heat transfer coefficient; thin-film Pt catheter tip sensor; Biomedical measurements; Blood flow; Catheters; Finite element methods; Fluid flow measurement; Heart; Heat transfer; In vivo; Radio frequency; Thin film sensors; Animals; Catheter Ablation; Computer Simulation; Endocardium; Equipment Design; Equipment Failure Analysis; Models, Cardiovascular; Swine; Thermal Conductivity; Thermography; Transducers;

fLanguage

English

Journal_Title

Biomedical Engineering, IEEE Transactions on

Publisher

ieee

ISSN

0018-9294

Type

jour

DOI

10.1109/TBME.2004.828035

Filename

1315872