Improvement of heart function after balloon dilation of congenital valvar aortic stenosis: A pilot study with ultrasound tissue Doppler and strain rate imaging

摘要: The aim was to investigate the effects of balloon dilation congenital valvar aortic (Ao) stenosis on heart function with conventional and new echocardiographic techniques. Nine patients, preballoon 1 4 d postballoon Ao-valve, were included in study. Assessment made by using echo/Doppler, tissue Doppler imaging (TDI) strain rate (SRI). Mean (and standard deviation) posttreatment drop valve pressure gradient 34.1 (sd 14.0) mmHg, p < 0.01. Conventional echo/Doppler end-diastolic left ventricular posterior wall (LVPW) thickness interventricular septum (IVS) did not change significantly. LV fractional shortening (FS) -5.2 3.2)%, observed changes FS significantly correlate magnitude changes. Changes TDI SRI parameters indicated that an increase absolute value is most cases, but correlation remains poor, a few exceptions, both free (LVFW) IVS. Data from IVS are more consistent than LVFW. It concluded global functional parameter assessed has diagnostic for assessment (improved) already shortly after intervention, when compared pretreatment value. Local echographic techniques show less significant short-term attributable intervention. Improvement precision measurements needed. A larger study fully expected potentials local improvement early as well revealing eventual late these parameters.