A method is provided for ablating tissue in a heart of a subject during an ablation
procedure. The method includes applying a local treatment to the heart at a plurality
of sites designated for ablation. At each respective site, a parameter is sensed
that is indicative of a level of ablation at the site. The method preferably includes
displaying a map of the heart, and designating, on the map, during the ablation
procedure, indications of the respective levels of ablation at the sites, responsive
to the respective sensed parameters.