Atrial Fibrillation Clinical Trial
Official title:
A Single-center, Observational, 12-months Study to Examine the Predictive Factors for Successful Outcome After Pulmonary Veins Ablation to Treat Patients With Paroxysmal Atrial Fibrillation.
Atrial fibrillation is the most common serious abnormal heart rhythm affecting about 2% to 3%
of the population, being associated with a 1.5- to 1.9-fold higher risk of death. Patients
with paroxysmal AF in whom antiarrhythmic drug therapy does not elicit a response are
potential candidates for RF ablation of AF. The success rate of RF ablation in the treatment
of AF varies depending on the type and duration of AF (ie, paroxysmal vs persistent),
structural remodeling of the heart, co-morbidities and the technique of the cardiac
electrophysiologist, but it usually ranges from 60-80% over 1-2 years of follow-up.
To study and predict the successful outcome of RF ablation is of great clinical importance.
Moreover, the detection of predictive factors for successful outcome may alter the
therapeutic strategy determining a subgroup of patients in the need of more invasive
management.
The study will include 150 patients scheduled to undergo pulmonary vein (PV) ablation because of non-responsive to medical therapy PAF. ECG recordings will be obtained during sinus rhythm before and after PV ablation with a 3 - channel digital recorder for 10 minutes, and digitized with a 16-bit accuracy at a sampling rate of 1000 Hz. The P wave will be analyzed using the Morlet wavelet. Other parameters to be analyzed include 12 lead surface ECG, the burden of main and secondary morphologies and echocardiographic indexes of left atrial mechanical function. Follow-up visits will be held in 3, 6 and 12 months after the ablation procedure. ;
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