Abstract 2072: Real Time Evaluation Of Longitudinal Peak Systolic Strain Of Left And Right Ventricles After An Isometric Test. Behaviour In Athletes
Background: Left and right ventricles (LV, RV) play a synergic role to determine the stroke volume however, a simultaneous evaluation of the segmental contribution to contractility of both chambers is not yet well investigated. Myocardial tracking techniques assess in real time longitudinal peak strain of left and right ventricles from B-mode imaging. and it is used here to verify possible dissimilar segmental contributions of the two chambers to contraction in a group of athletes matched with a sedentary control group during an isometric tests where a pressure load is predominant.
Methods: we evaluated 15 athletes and 10 sedentary controls (age 25 ± 5) at rest and after hand grip (HG) stress, Echocardiography included the main systolic and diastolic parameters and the peak systolic strain, in the left and right ventricle at basal and apical segments of the lateral wall (LW) at rest and after HG.
Results: Deformation values in the LW of the RV and LV of the two groups are shown in Table I⇓. Table I⇓. Peak systolic strain (%), in basal and apical segments of the LW. In both Strain values of RV are significantly higher than LV, at rest and after HG in every segment analyzed (p= .001); Particularly in athletes the strain values of apical segments of left and right ventricles increase significantly than basal after HG. EF shows a physiological increase in both with stress (Athletes from 60% to 63%; controls 61% vs 65%.)
Conclusions: Myocardial tracking allows the simultaneous evaluation of contractility in the left and right ventricles that normally have different workloads mostly during isometric test. Globally RV strain values at rest and after HG are always significantly higher than in LV. In athlete’s group the deformation of the apical segments of the two ventricle chambers, after stress, is significantly higher than in basal. This could support the hypothesis that the efficacy of the stroke volume depends in athletes by the major deformation of the apical segments of the two chambers.