Author/Authors :
J.G، Webster, نويسنده , , C.، Tangwongsan, نويسنده , , J.A.، Will, نويسنده , , Jr.، Meredith, K.L., نويسنده , , D.M.، Mahvi, نويسنده ,
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 pigsʹ cardiac chambers. With flows, h varies from 2500 to 9500 W/m/sup 2/.K. With zero flow, h is approximately 2400 W/m/sup 2/.K. These values of h can be used for the finite element method modeling of radiofrequency cardiac catheter ablation.
