Key result
Pulsed Doppler-derived stroke volumes correlated linearly with stroke volumes calculated from M-mode left ventricular dimensions using Feigenbaum (r = +0.76) and Teichholz (r = +0.77) equations.
Why the study?
How do stroke volumes calculated from M-mode echocardiography correlate with pulsed Doppler echocardiography in healthy neonates?
Cross-Sectional (n=112)
How do stroke volumes calculated from M-mode echocardiography correlate with pulsed Doppler echocardiography in healthy neonates?
Effect estimate: r = +0.76 and +0.77
Doppler-derived stroke volumes correlate well with M-mode derived stroke volumes in healthy neonates, supporting its use for noninvasive monitoring.
Correlations may support Doppler stroke volume estimates in healthy neonates; leaves open clinical interchangeability with M-mode methods.
Noninvasive monitoring of stroke volume by pulsed Doppler echocardiography is an important recent advance in neonatal care. Using this technique, we assessed stroke volume in 112 healthy neonates (birth weight 780-5350 g, menstrual age 27-42 weeks). Stroke volume increased with advancing birth weight (r = +0.93) and gestational age (r = +0.90). Mean stroke volume per kilogram body weight (1.77 +/- 0.28 ml/kg) was constant throughout the study population. Doppler-derived stroke volumes correlated linearly with left ventricular dimensions in diastole and in systole. Stroke volumes calculated from left ventricular dimensions using the Feigenbaum and Teichholz equations correlated equally well with Doppler-derived stroke volume values (r = +0.76 and +0.77, respectively).
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Walther et al. (1986) conducted a cross-sectional in Healthy neonates (n=112). Pulsed Doppler echocardiography vs. M-mode echocardiography (Feigenbaum and Teichholz equations) was evaluated on Correlation between Doppler-derived stroke volumes and stroke volumes calculated from left ventricular dimensions (r = +0.76 and +0.77). Pulsed Doppler-derived stroke volumes correlated linearly with stroke volumes calculated from M-mode left ventricular dimensions using Feigenbaum (r = +0.76) and Teichholz (r = +0.77) equations.
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