5.2 Case series
In twelwe patients undergoing AF ablation, voltage map and velocity map
of the left atrium in sinus rhythm were registered using HD Grid. The
mean age of the patients was 55.5 ± 11.5 yo, 4 (33.3%) were male. Mean
left atrial volume was 31.8 ± 8.9 ml/m2. Voltage map showed no areas of
fibrosis (< 0.05 mV). The velocity map registered a mean left
atrial velocity of 1±0.1 m/s. Pulmonary vein antra conduction velocity
mean value was 1.2 ± 0.4 m/s. In the anterior portion of the LA, a
greater mean conduction velocity than the other zone of the LA was
recorded (1.7±0.3 m/s) (Figure 4). This area corresponds to the area
where Bachmann bundle run. No variations in impulse speed were noted
respect to age and gender.
Conclusions
OT is a promising technology that allows a better characterization of
arrhythmias regardless of the position of the catheter to the direction
of the arrhythmia and that can find application both in the treatment of
supraventricular and ventricular arrhythmias. It also allows
quantitative analysis of the conduction velocity and that can be applied
in the characterization of macro-reentrant arrhythmias.
Electroanatomical mapping has made possible to treat complex arrhythmias
that previously were not possible with transcatheter ablation. The
technology is constantly updated and the knowledge of the systems used
by electrophysiologists and the collaboration with technicians and
engineers assumes an increasingly important role.
Author Contributions: Conceptualization, G.V., P.C., A.D.R. and M.C.;
Methodology, G.V. and M.C.; Formal analysis, G.V. and M.C.; Data
Collection, V.L.P and B.B.; Writing—original draft preparation, G.V.;
Writing—review and editing, G.V., M.C., L.C., Q.P., Y.V., F.C., L.L.,
L.D., L.C., A.I., A.G., A.D.R., P.C. All authors have read and agreed to
the published version of the manuscript