The relationship between systolic notch duration of right ventricular outflow tract Doppler flow spectrum and gestational age and pulmonary blood flow.

ABSTRACT:

Background

Right ventricular outflow tract (RVOT) systolic notch of Doppler flow pattern is common in normal fetuses, but its relationship with gestational age (GA) and pulmonary hemodynamics remains unknown. The aim of this study was to evaluate the changes of RVOT systolic notch with GA, and the correlation with pulmonary blood flow (PBF).

Methods

A total of 124 fetuses underwent detailed measurements of right ventricular function, pulmonary hemodynamics, and RVOT Doppler envelope characteristics during routine fetal echocardiography. The relationship between RVOT systolic notch and GA, and PBF, was analyzed.

Results

RVOT systolic notch of Doppler flow pattern ('spike and dome' morphology) was observed in all the fetuses. Notch duration (r=0.726, P<0.0001), notch du

SUBMITTER: Xu L 

PROVIDER: S-EPMC12682529 | biostudies-literature | 2025 Dec

REPOSITORIES: biostudies-literature