Discussion
This is the first study evaluating the long-term durability of
EIVM-induced atrial lesions. Our main results are that 1) EIVM created
durable lesions that persisted through time; 2) despite 83% immediate
success in achieving MI block, one quarter of these patients underwent
late MI reconnection after EIVM. MI gaps are located at the mitral
annulus edges and in the coronary sinus, but not within the EIVM created
scar.