Radiofrequency Ablation Versus High-Frequency Ablation In-Vivo Comparison

The high frequency (HF) intracardiac ablation has shown its ability to obtain atrioventricular blocks (AVB) with relatively low power. In this paper, the equipment used in High Frequency (HF) ablation technique is described. The frequency used is from 500 kHz to 1 MHz in the case of Radiofrequency (RF) technique and 27.12 MHz for HF technique. Ablation under the same conditions using the Nakagawa protocol was done. Quantitative comparison of the two methods shows efficiency of the HF technique. The results obtained in this study show that the HF technique produces lesions wider and deeper than that obtained with RF technique. Thus, HF technique is more appropriate for cardiac ablations in the ventricle. The results also showed that HF technique provides linear lesions thus delimiting the necrotic tissue from healthy tissue. With the RF technical, dimensions of the obtained lesion are (9x7x5) mm3 for 270 joules applied power. With the same energy, the dimensions of lesion are (10x9x5) mm3 for the HF Technique.