Discussion
In the current case, AT originated at the apex of upper lobe on LAA. The
AT could not be terminated by endocardial CA but eliminated by
epicardial CA. To the best of our knowledge, this is the first report on
one child illustrating an AT with an epicardial LAA origin that was
successfully ablated through epicardial approach with subsequent
surgical appendectomy. The termination of AT and a decrease in LAD and
NT-proBNP were achieved during the 12-month follow-up. On the whole, the
preliminary results were inspiring.