Figure 1. In vitro experimental setup.
(A) The saline solution in the water pool was kept at 37 °C using a
thermostatic system and it was driven across the surface of the
myocardial tissue at a flow rate of 5 L/min to simulate blood flow. The
solution in the water pool was adjusted to 90 and 140 ohms of baseline
LI for MiFi and STABLEPOINT, respectively. (B) Lesions were created on
the porcine myocardial left ventricles by 2 LI-sensing ablation
catheters. (C) RFCA was performed with a constant power of 30 watts and
a duration of 30 seconds. The CF and catheter contact angles were
changed in each set.
LI = local impedance, CF = contact force, RFCA = radiofrequency
ablation.