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 Wheatstone-bridge 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.
- Cardiac radiofrequency ablation
- Convective heat transfer coefficient
- Endocardial convective heat transfer coefficient
- Heat convection
- Radiofrequency ablation
ASJC Scopus subject areas
- Biomedical Engineering