Speckle tracking derived left and right ventricular strain, strain rate and

摘要

Objectives: Aim of the study was to assess left and right ventricular strain, strain rate and left ventricular rotation in children at late follow up after atrioventricular node slow p at hway radiofrequency ablation. Materials and methods: Left and right ventricular strain, strain rate, left ventricular rot at ion, rotational velocity and twist were assessed using the speckle tracking echocardiography in 22 children who underwent radiofrequency ablat ion of slow pathway and in 15 healthy control children. Results: There were no significant differences in conventional echocardiographic left and right ventricular paramet ers between the two groups (p>0.05), except left atrial volume (28.0±8.7 ml in control group vs. 37.3±13.9 ml in radiofrequency ablation gro up, p=0.024) and right atrial volume (16.0±6.7 ml vs. 21.5±8.5 ml, respectively, p=0.047) and their left (16.7±6.0 ml/m2vs. 26.3± 9.8 ml/m2, p=0.002, respectively) and right (16.0± 6.6 ml/m2vs. 21.5±8.5 ml/m2, respectively, p=0.05) indices that were significantly higher in radiofrequency ablation group. Speckle tracking imaging derived regional and global strain, systolic and diastolic left and right ventricular strain rate as well as left ventricular rotation, rotational rate did not differ between the radiofrequency ablation group and controls (p>0.05). Left ventricular twist was comparable b etween the radiofrequency ablation group and controls (p>0.05). Conclusions: Speckle tracking echocardiograp hy d id not revealed any deterioration of regional and global axis function o f the left and right ventricles in children, who und erwent atrioventricular node slow pathway radiofrequency ablation