Ablation of atrial tachycardia by the QDOT
MICROTM Catheter
Although the QDOT MICROTM Catheter was designed for
atrial procedures data on the treatment of atrial tachycardia is limited
to only one published case report.
Here a patient with perimitral atrial tachycardia with a critical
isthmus on the anterior wall was treated by the QDOT
MICROTM Catheter utilizing QMODE+ only. An ablation of
an anterior line was performed. After 10 vHPSD applications the atrial
tachycardia terminated and the anterior line was completed with a total
of 29 applications with an extremely low RF time of 116seconds. No
periprocedural complications occurred. Interestingly the microelectrodes
of the QDOT MICROTM Catheter showed sharp and
fragmented potentials at the area of the critical isthmus even though
the standard electrodes showed no visible signals. This observation
demonstrated the applicability of the microelectrodes for identifying
potential targets for catheter ablation. The combination of
microelectrodes and vHPSD ablation seems to be an interesting option for
mapping and ablation of atrial tachycardias (Figure 4 ).