Introduction
A previous case report demonstrated inadvertent electrical superior vena
cava (SVC) isolation during radiofrequency and cryoballoon application
to the right superior pulmonary vein (RSPV) in the acute
phase.1-4 However, the long-term impact of RSPV
isolation on the right atrial (RA) and SVC junction is undetermined.
Here we describe a case of persistent SVC isolation by cryoballoon-based
PV isolation. The electroanatomical mapping system clearly visualized
the persistent effect of the cryoballoon application to the SVC.