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20-Jul-2020 04:52

There was no acute PV stenosis or thrombosis observed in any treated PVs based on the venogram performed during the procedure.

At 1 week and 6 months after the procedure, the MRA of PVs showed no evidence of stenosis or even mild narrow (.

In some patients with persistent AF, catheter ablation encircling the pulmonary veins (PVs) restores sinus rhythm (SR) without requiring cardioversion (CV).

In this study we characterized features of the ECG and intracardiac electrograms that predicted conversion to SR during ablation.

Methods: 33 pts (male 20, mean age 55yrs) with persistent AF referred for catheter ablation were studied.

AF waves were defined as coarse in an ECG lead if the mean amplitude was Electrical connections between contiguous pulmonary veins (PVs) (inter-PV connections) might be a cause of difficult PV isolation in patients with paroxysmal atrial fibrillation (AF).

Another 4-polar electrode was placed in between the right atrium and the superior vena cava (SVC) for recording and pacing.

Radiofrequency (RF) energy was administrated in the junction between left atrium (LA) and PVs.Identification of pulmonary vein potentials (PVP) is critical to identifing myocardial segments in PVs for PV isolation as therapy for atrial fibrillation (AF).Because this can be difficult during sinus rhythm pacing from different atrial sites might improve PVP identification.Aim of the study was to determine the long-term safety and efficacy of anatomical PV isolation with an ultrasound balloon ablation system (IBI Inc.).Methods: Circumferential ultrasound balloon ablation of both upper PVs and left inferior PV were performed in 47 patients (mean age 55±10 years; 38 males) with symptomatic and drug refractory paroxysmal atrial fibrillation. A contrast-enhanced magnetic resonance angiography (MRA) of PVs were performed before, at 1 week and 6 months after the ablation procedure to define the anatomy of PVs and to measure the diameter of ostium of each PVs in all patients.

Radiofrequency (RF) energy was administrated in the junction between left atrium (LA) and PVs.

Identification of pulmonary vein potentials (PVP) is critical to identifing myocardial segments in PVs for PV isolation as therapy for atrial fibrillation (AF).

Because this can be difficult during sinus rhythm pacing from different atrial sites might improve PVP identification.

Aim of the study was to determine the long-term safety and efficacy of anatomical PV isolation with an ultrasound balloon ablation system (IBI Inc.).

Methods: Circumferential ultrasound balloon ablation of both upper PVs and left inferior PV were performed in 47 patients (mean age 55±10 years; 38 males) with symptomatic and drug refractory paroxysmal atrial fibrillation. A contrast-enhanced magnetic resonance angiography (MRA) of PVs were performed before, at 1 week and 6 months after the ablation procedure to define the anatomy of PVs and to measure the diameter of ostium of each PVs in all patients.

Results: In 45/133 pairs of successfully isolated ipsilateral PVs (left 23/67; 34% and right 22/66; 33%), contiguous PVs were disconnected simultaneously by final RF delivery (indirect evidence of inter-PV connections).