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