CardioFocus has reported one-year follow-up data from a trial of its HeartLight endoscopic ablation system as a treatment for atrial fibrillation.

HeartLight consists of an illuminating endoscope that provide physicians with direct visualisation within a beating heart, in real-time and without radiation.

The system also features a dynamically adjustable balloon catheter for improved contact with the pulmonary vein ostium and uses laser energy for precise ablation.

The study demonstrated a 99% acute pulmonary vein isolation rate and a 60% chronic clinical success rate from a single catheter ablation procedure.

After a median follow up of 402 days, 24 patients (60%) remained free of any symptomatic or documented atrial fibrillation episode without anti-arrhythmic drugs after a single procedure.

Lead investigator Andreas Metzner said that the initial catheter ablation procedures using the HeartLight endoscopic ablation system allowed the researchers to achieve a high pulmonary vein isolation rate acutely, using only a single compliant balloon-equipped catheter to perform the ablation.

”We expect future outcomes to show that the rate of single procedure clinical success continues to improve with procedural experience,” Metzner said.