Pulmonary vein isolation using cryoballoon vs. optimized high-power short-duration: a propensity score study.

Area of Science:

• Cardiology
• Electrophysiology
• Medical Devices

Background:

• Pulmonary vein isolation (PVI) is the primary treatment for paroxysmal atrial fibrillation (AF).
• A hybrid radiofrequency (RF) approach combining very high-power short-duration (vHPSD) posteriorly and ablation index guided high-power short-duration (HPSD) anteriorly demonstrates promising effectiveness, safety, and efficiency.
• This study compares the vHPSD/HPSD RF approach with cryoballoon (CB) ablation for PVI in paroxysmal AF patients.

Purpose of the Study:

• To compare the effectiveness, safety, and efficiency of a hybrid RF PVI strategy (vHPSD/HPSD) against CB ablation in patients with paroxysmal AF.
• To evaluate long-term outcomes and procedural characteristics of both ablation techniques.

Main Methods:

• A propensity score-matched analysis was conducted on patients undergoing PVI for paroxysmal AF.
• Ninety-six patients who received vHPSD/HPSD RF ablation were matched 1:1 with 96 patients who underwent CB ablation.
• Matching criteria included age, gender, hypertension, diabetes, left atrial diameter, and left ventricular ejection fraction.

Main Results:

• Over a mean follow-up of 22.6 months, freedom from atrial tachyarrhythmias was achieved in 84.4% of the RF group versus 75% in the CB group (P=0.1).
• The CB group experienced one cerebrovascular event and four phrenic nerve palsies (which resolved within a year).
• Procedure times were comparable, but the vHPSD/HPSD RF group had significantly shorter fluoroscopy times (4.9 min vs. 10.8 min, P<0.01).

Conclusions:

• The optimized workflow of the hybrid vHPSD/HPSD RF approach provides point-by-point PVI that is as fast, safe, and effective as CB ablation.
• This hybrid RF strategy offers a potential advantage in reducing fluoroscopy exposure for patients undergoing PVI for paroxysmal AF.