RESULTS
From May 2017 to December 2019, 97 patients were scheduled for reentrant AT ablation, excluding CTI-dependent atrial flutter. Of these, 18 patients (18.6%) presented non-mappable circuits and were included (Table 1). 7 Patients (39%) were >75 years of age and 4 patients (22%) were >80 years of age. 7 Patients (39%) had severe LA dilation. Mean procedural time was 265 ± 67 minutes and mean fluoroscopy use, expressed as dose-product area (PDA), was 28499 ± 10212 mGy · cm2. Of note, only 5 patients were on rhythm control drugs (flecainide, n = 2; propafenone, n = 1; sotalol, n = 1; and amiodarone, n = 1) before the index procedure.
Included patients (with non-mappable circuits) had less enlarged left atria than those with mappable circuits.