Key result
Pulsed wave Doppler echocardiography demonstrated that combined ventricular output in normal fetuses increases from approximately 50 ml/min at 18 weeks to 1200 ml/min at term.
Observational (n=120)
This study establishes baseline normal values for fetal cardiac blood flow velocities and ventricular output across gestational ages using Doppler echocardiography.
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Establishes normative fetal ventricular output ranges across gestation; extends echocardiographic references but leaves open prospective clinical validation.
Allan et al. (1987) conducted an observational in Normal fetuses (n=120). Pulsed wave Doppler echocardiography was evaluated on Blood flow velocity and ventricular output. Pulsed wave Doppler echocardiography demonstrated that combined ventricular output in normal fetuses increases from approximately 50 ml/min at 18 weeks to 1200 ml/min at term.
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