Yves de Greef

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PURPOSE To identify procedural parameters predicting recurrence of atrial fibrillation (AF) after a first circumferential pulmonary vein isolation (CPVI). METHODS One hundred seventy-one patients undergoing CARTO-guided CPVI for recurrent AF with a left atrial (LA) diameter <45 mm were studied. Follow-up (symptoms and 7-day Holter) was performed at 1 and(More)
BACKGROUND The risk of pulmonary vein narrowing (PVN) after pulmonary vein isolation, using a novel multi-electrode ablation catheter, is unknown. METHODS AND RESULTS Left atrial volume and PV diameters were compared by computed tomography (CT) before and 3 months after pulmonary vein isolation using duty-cycled phased radio frequency energy (2:1 or 4:1(More)
AIMS Pulmonary vein isolation (PVI) is an accepted treatment to relieve symptoms in patients with atrial fibrillation (AF). We studied 3 year outcome after PVI guided by duty-cycled multi-electrode radiofrequency (RF) ablation (pulmonary vein ablation catheter, PVAC) and provided comparative data to outcome after conventional PVI (CPVI) using mapping with(More)
AIMS Prior reports using pacing manoeuvres, demonstrated an up to 42% prevalence of residual pulmonary vein to left atrium (PV-LA) exit conduction after apparent LA-PV entry block. We aimed to determine in a two-centre study the prevalence of residual PV-LA exit conduction in the presence of unambiguously proven entry block and without pacing manoeuvres. (More)
OBJECTIVE The objective was to study the impact of radiofrequency (RF) characteristics on acute pulmonary vein reconnection (PVR) and outcome after PVAC ablation. PVI with additional ablation of PVR (PVI + PVR) was compared to PVI-only. METHODS In 40 consecutive patients, after PVAC-guided PVI, adenosine and a 1-hour waiting time were used to unmask and(More)
ase report he patient was a 44-year-old man with highly symptomatic aroxysmal atrial fibrillation (AF). The paroxysms of AF ad started 6 years earlier and initially had been treated with lass IC and Class III antiarrhythmic drugs. He was referred or invasive treatment due to persistent symptomatic AF aroxysms despite medical therapy and after he developed(More)
BACKGROUND Pulmonary vein isolation (PVI) is usually performed with multiple point-by-point radiofrequency ablation with a second multielectrode circular mapping catheter to validate isolation. We evaluated a 30-mm high-density mesh electrode (HDMA) for mapping and PVI in patients with recurrent atrial fibrillation (AF). METHODS In 13 patients (validation(More)
Percutaneous catheter ablation is now a well-established, efficient and effective treatment strategy for recurrent, symptomatic atrial fibrillation (AF). Major complications though occur in up to 5.9% of procedures. New complications still continue to emerge. Delayed tamponade is only recently recognized as a major complication after ablation. We present a(More)
AIMS To analyse procedural results and clinical outcome of paroxysmal atrial fibrillation (AF) ablation using the 30 and 35 mm high-density mesh ablator (HDMA, Bard Electrophysiology). METHODS AND RESULTS Sixty-four consecutive patients were ablated with the HDMA catheter (26 with the 30 mm, 38 with the 35 mm device). If pulmonary vein (PV) isolation was(More)