Tissue Doppler Imaging Measures Correlate Poorly with Left Ventricular Filling Pressures in Pediatric Cardiomyopathy

SettingIn adults with cardiomyopathy, tissue Doppler imaging (TDI) has been shown to correlate with left ventricular filling pressures (LVFPs) and has been advocated as a surrogate to catheterization. However, this has not been validated in children. DesignThis is a retrospective review of children 18 years old with dilated, hypertrophic, restrictive, and left ventricular noncompaction cardiomyopathy who underwent cardiac catheterization within 3 months of an echocardiogram. Spearman's correlation coefficients were calculated to assess a correlation between LVFP and mitral inflow E/A ratio, lateral mitral E/E, and septal E/E. ResultsThirty-eight patients were included in the study; median age was 8.6 years old. The median LVFP was 19mmHg, median mean pulmonary artery pressure was 25mmHg, and median pulmonary vascular resistance index (PVRi) was 2.4 Wu. There was no significant correlation between LVFP or PVRi with lateral mitral E/E or septal E/E. There was a positive correlation between LVFP and mitral inflow E/A ratio (r(s) = 0.59, P < .01). In a subgroup analysis of patients with hypertrophic or restrictive cardiomyopathy, there was a negative correlation (r(s) = 0.56, P = .02) between the mean pulmonary artery pressure and septal A. ConclusionsTDI measures of diastolic function are not reliable surrogates for LVFP, mean pulmonary artery pressures, and PVRi at catheterization in children.