(CB) ablation is successful in eliminating atrial fibrillation (AF). Purpose: The purpose of this study was
to assess procedural efficacy and safety of CB ablation performed by a newly
patients with documented paroxysmal AF (58 ± 11 years, 26 male) undergoing CB
catheter ablation were prospectively enrolled.
pulmonary vein (PV) isolation was achieved in all patients (156 PVs). The
primary end point (PV isolation using CB only) was reached in 31 patients (92%
PV isolation, 144/156 PVs). In the remaining 9 patients (12 PVs), additional
single point cryofocal ablations were required to achieve isolation of all
veins (LSPV, n = 5; LIPV, n = 3; LCPV, n = 2; RSPV, n = 1; RIPV, n = 1). There was
no vascular access complication, pericardial effusion/tamponade,
stroke/transient ischemic attack, phrenic nerve palsy, acute PV stenosis, or
atrioesophageal fistula. The procedure duration decreased with experience by
30% from 155 min during the first 10 procedures to 108 min (final 10
treatments). Similar effects were observed with fluoroscopy time (-57%; from 28
min to 12 min), dose area product (-66%; from 22 Gy x cm2 to 8 Gy x
cm2), CB time in the left atrium (-24%; from 99 min to 75 min), and
cryoenergy delivery time (-19%; from 83 min to 67 min), when comparing case
#1-10 to case #30-40.
ablation of AF is effective and safe in the hands of a new operator. Procedure
and fluoroscopy times decrease with user experience.
Credits: Eberhard Scholz; Patrick Lugenbiel; Patrick A. Schweizer; Panagiotis Xynogalos; Claudia Seyler; Edgar Zitron; Rüdiger Becker; Hugo A. Katus; Dierk Thomas