Fig. 1From: Repeatability of echocardiographic parameters to evaluate the hemodynamic relevance of patent ductus arteriosus in preterm infants: a prospective observational studyMeasurement of VTI_Pa in a parasternal short axis view. The pulsed-wave Doppler-sonographic measurement of VTI_Pa in a parasternal short axis view is corrupted by ductal jet extending to the pulmonary valveBack to article page