The purpose of this study was to determine whether left atrial appendage flow velocity, as determined using trans esophageal echocardiography (TEE), predicts the outcome after catheter ablation of persistent Atrial fibrillation( pAF).
40 PAF patients underwent 3D mapping and ablation. A stepwise approach including circumferential pulmonary vein (PV) isolation, continuous complex-fractionated electrogram (CFE) ablation and linear ablation was performed by the same operator. The procedural end point was termination of persistent AF by catheter ablation, either by conversion directly to sinus rhythm or to atrial tachycardia. Left atrial appendage (LAA) peak flow velocities were measured with transesophageal echography and averaged within each RR interval of 10 consecutive cardiac cycles.
Study Type
OBSERVATIONAL
Enrollment
40
All patients were evaluated by a complete transesophageal echocardiography with multiplane probes with a 7-MHz transducer before catheter ablation .LA appendage flow was obtained by placing the pulsed Doppler sample volume at the orifice of the LA appendage, after which peak flow velocities were measured and averaged within each RR interval of 10 consecutive cardiac cycles
Clinique Pasteur
Toulouse, 43-45 Avenue de Lombez, France
termination of persistent AF by catheter ablation
Recurrences of AF were therefore determined from holter monitoring at 3 and 6 months or 12 leads ECG in care of symptomatic palpitation with clinical interview.
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