Parameters of Central Hemodynamics in Patients With Paroxysmal Atrioventricular Nodal Reciprocal Tachycardia Before and After Radiofrequency Catheter Ablation

We present in this article results of assessment of morphofunctional state of the myocardium in patients with typical form of paroxysmal atrioventricular nodal reciprocal tachycardia (AVNRT) before and during one year after radiofrequency catheter ablation of slow part of atrioventricular junction and their comparison with analogous parameters of control group. Participants of this study (n=81) were divided into 2 groups: main (study group) and control group. Main group comprised 61 (75.3%) patients with AVNRT in variant of typical course, mean age 45.3+/-15.1 years. All patients of study group were subjected to endocardial electrophysiological investigation and radiofrequency ablation (RFA) - modification of slow part of atrioventricular junction. Control group comprised 20 practically healthy persons aged 41.9+/-5.3 years in whom no structural pathology of cardiovascular system was found. Transthoracic echocardiography (EchoCG) was carried out before and in 2, 6, and 12 months after operation in patients of main group and once in control group. Analysis of parameters of central hemodynamics studied with the Echo method in patients of main group before and in 2, 6, 12 months after RFA demonstrated that before conduct of surgical intervention there were no significant differences between the parameters studied and analogous characteristics of the control group. It was established in the course of dynamic observation of patients of the study group that in 2, 6 and 12 months after RFA the studied parameters of central hemodynamics did not undergo substantial changes compared with initial values. According to EchoCG data so called minor anomalies of development of cardiac connective tissue were diagnosed in 28 cases (45%) among patients of study group and in 2 cases (10%) in control group.