Status
Conditions
Treatments
About
A total of 106 patients with drug-refractory persistent atrial fibrillation, who are planned to undergo circumferential pulmonary vein isolation (CPVI), will be randomly allocated into two groups. These patients will receive cryoballoon ablation, radiofrequency ablation under the guidance of 3D mapping respectively (allocation ratio, 1:1). Atrial electrical activity including atrial effective refractory period, atrial conduction time, electromechanical conduction time, P wave dispersion and spatial dispersion of atrial refractory will be measured before and after the operation. Left atrial appendage flow velocity of all patients are measured by Transesophageal Echocardiography(TEE) 24 hours before the operation. Real-time ultrasound examinations of left atrial function are carried out for all patients before the operation and after the operation. Blood samples are extracted in all patients before the operation and after the operation.This study will clarify whether these different operation methods have different effects on the recovery of postoperative left atrial function and electrical activity in patients with persistent atrial fibrillation, and whether changes in left atrial function electrical activity are related to indicators such as inflammation, blood clotting and myocardial injury. Cryoballoons ablation is still less used to operate on persistent atrial fibrillation. To investigate the ablative effect, electrical remodeling and structural remodeling of persist atrial fibrillation with different operating methods. Therefore, the ablation is related indicators such as the success rate of the operation, intraoperative complications, postoperative recurrence rate and the amount of x-ray exposure are compared among two groups. At the same time, biochemical indicators of inflammation, blood clotting and myocardial injury such as blood routine, myocardial enzyme, BNP, troponin I and D-D dimmer are detected to analyze and determine which indicators are related to the postoperative recurrence of atrial fibrillation, the recovery of postoperative left atrial function.
Full description
From February 2018 to February 2020, the investigators enroll consecutive patients with drug-refractory persistent atrial fibrillation who were scheduled for an initial catheter ablation.Patients are divided in to two group: persistent AF in radiofrequency ablation group, cryoballoon ablation group.
Enrollment
Sex
Ages
Volunteers
Inclusion and exclusion criteria
Inclusion Criteria:Persistent
Exclusion Criteria:
•left ventricular dysfunction
Primary purpose
Allocation
Interventional model
Masking
106 participants in 2 patient groups
Loading...
Data sourced from clinicaltrials.gov
Clinical trials
Research sites
Resources
Legal