THE IMPACT OF LOWER VOLTAGE AREA AND GROSS AREA OF LEFT ATRIUM ON THE PROGNOSIS AFTER ELECTROPHYSIOLOGICAL
CHARACTERISTICS IN ATRIO-VENTRICULAR NODAL REENTRANT TACHYCARDIA WITH CONTINUOUS ATRIO-VENTRICULAR NODE FUNCTION CURVE
1W.J. Park, Y.J. Choi, 1S.H. Lee, 1D.G. Shin, 2H.S. Park, 2Y.N. Kim, 3M.H. Bae, 3Y.K. Cho, 4Y.S. Lee , 5 B.C. Jung
1cardiology department, Yeungnam university hospital, Daegu, Korea, 2cardiology department, Keimyung university hospital, Daegu, Korea, 3cardiology department, Kyungpook national university hospital, Daegu, Korea, 4cardiology department,
Daegu catholic university hospital, Daegu, Korea 5 cardiology department, Fatima medical centre, Daegu, Korea
Introduction: We sought to evaluate electrophysiological characteristics in AVNRT with continuous AV node function curve.
Methods&materials:: From September 2012 to February 2013, 12 patients who underwent catheter ablation for AVNRT were enrolled in Yeungnam University Medical Center. The study population was categorized into 2 groups. Group 1 included 6 patients with discontinuous AV node function curve and group 2 included 6 patients with continuous AV node function curve. The differences between pre- and post-catheter ablation were evaluated in each group. And the differences between 2 groups were also analyzed and compared.
In both groups, maximal AH interval during atrial pacing or atrial extra-stimulus test was shortened significantly after catheter ablation(in group1, 373.0±93.6 vs. 190.7±21.0,p=0.009, in group2, 335.8±125.5 vs.240.8±92.2,p=0.001). There was no significant difference including baseline cycle length, AH interval, anterograde AVN ERP and AV block cycle length between pre- and post-catheter ablation in each group. Retrograde conduction capacities were not evaluated in this study.
Results: In both groups, maximal AH interval during atrial pacing or atrial extra-stimulus test was shortened significantly after catheter ablation(in group1, 373.0±93.6 vs. 190.7±21.0,p=0.009, in group2, 335.8±125.5 vs.240.8±92.2,p=0.001). There was no significant difference including baseline cycle length, AH interval, anterograde AVN ERP and AV block cycle length between pre- and post-catheter ablation in each group. Retrograde conduction capacities were not evaluated in this study.
Conclusions: The significant shortening of maximal AH interval after catheter ablation suggests successful elimination of AVNRT.
