LAUSR

Preprocedural imaging usually involves a cardiac CT which allows delineation of the pulmonary vein— left atrium anatomy so that the operator is aware of the anatomical variants even before the ablation procedure. It is much more accurate than intraprocedural angiography of the left atrium previously used. Other techniques used include preoperative rotational CT angiography or MRI and integration of the images with the electroanatomical map created during the procedure. The use of intracardiac echocardiography has enabled better intraprocedural imaging but still lacks the clarity provided by cardiac CT imaging.