Speckle Tracking Derived Left and Right Atrial, Left and Right Ventricular Strain, Strain Rate After Atrioventricular Node Slow Pathway Radiofrequency Ablation

摘要

The supraventricular tachycardias - atrioventricular reentrant tachycardia due to accesory pathways and atrioventricular nodal reentrant tachycardia are common in children. During the last decade transcatheter radiofrequency ablation (RFA) of supraventricular tachycardias in children became a method of choice due to it's safety and effectiveness [1]. However, the lesions in myocardium are created by radiofrequency current itself (500 kHz) and by the thermal effect (t~(0-) 50~0), in the case of atrioventricular nodal reentrant tachycardia - in the zone of tricuspid valve. Previous clinical and experimental studies have provided evidence that postprocedural expansion of myocardial radiofrequency lesions can occur.