| Objective:To investigate the change of atrial and pulmonary veins ERP and refractory period dispersion in the patients with paroxysmal atrial fibrillation. Methods Ten patients with paroxysmal atrial fibrillation and fifteen patients with a left-sided accessory pathway without a prior history of AF were included. Before circumferential pulmonary vein isolation in the AF group,the effective refractory periods (ERP) of left atrial front wall, left atrial roof,wall left atrial Posterior, wall high right atrial and left superior pulmonary vein,left inferior pulmonary vein,right superior pulmonary, right inferior pulmonary vein were determined. After being done angiography of left atrium in control group, their ERPs on above sites were measured separately. Results①The DI of patients with paroxysmal atrial fibrillation and was0.133±0.057,the control group was0.075±0.028, P<0.05;②The ERP of left atrium in AF group was shorter than that in control group[(248±25.99) ms vs (248±25.99)ms, P<0.05)]. The ERP of PVs in AF group was shorter than that in control group[(230.75±32.69)ms vs (244.33±26.78), P<0.05)].Conclusions:①The DI of AF group increases obviously. Both the ERP of left atrium and the ERP of PVs in AF group were shorter than those in control group. |
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