Laser- based PVI has been around for many years and this modality of
ablation is to provide a continuous circular overlapping lesions around
the PVs' ostia. In order to ensure the continuity of the lesion, a
camera is embedded in the system as to guide the placement of sequential
applications with the target to make an adequate overlapping of two
contiguous lesions as to reduce the likelihood of gaps. The first
version of the system required the operator to manually rotate the
catheter as to create a continuous arc of lesion around the PV's ostium.
This approach is time-consuming, with a substantial overall time for
each PV. The evolvement of the technique has been recently offered, with
a novel semi-automated VGLA as to improve ablation efficiency by using a
motorized system which moves the laser arc continuously in order to
reduce the application time and, hopefully, minimize the creation of
gaps.