Characteristics of Myocardial Tissue Staining and Lesion Creation with an Infusion-Needle Ablation Catheter for Treatment of Ventricular Tachycardia in Humans.

With infusion-needle ablation, pre-ablation injection of contrast can help confirm an intramural position and predict lesion creation. Tissue diffusion patterns vary markedly; and studies to assess its relation to tissue architecture and ablation lesion geometry warrants further investigation. The findings also have implications for the injection of therapeutic agents into regions of scar.