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[Mechanical human heart work in a newborn infant]
L I Irzhak1, T A Irzhak, L A Gol'ts
1Syktyvkar State University, Russia.
Rossiiskii Fiziologicheskii Zhurnal Imeni I.M. Sechenova
|August 24, 2000
Insights
Newborn infant heart function, measured by echocardiography, shows work capacity comparable to adults. This study confirms the Frank-Starling mechanism is active in neonates.
Area of Science:
- Cardiology
- Neonatology
- Physiology
Context:
- Neonatal cardiac function assessment.
- Echocardiography and Doppler techniques in infants.
- Establishing baseline cardiovascular parameters in newborns.
Purpose:
- To evaluate the heart work capacity in newborn infants.
- To compare neonatal cardiac function with adult values.
- To investigate the applicability of the Frank-Starling mechanism in neonates.
Summary:
- Echocardiography and Doppler studies on newborns (up to 10 days old) revealed a heart work capacity of approximately 6 Wt.
- Relative heart capacity was measured at 25 Wt/100 g of ventricular mass.
- Findings indicate that neonatal cardiac performance is similar to that of adult humans.
Impact:
- Provides crucial data on normal neonatal cardiac physiology.
- Corroborates the presence and function of the Frank-Starling mechanism in newborns.
- Establishes a reference for future studies on infant cardiac health and disease.
Abstract:
The echo- and dopplerography of newborn infants up to 10-day age revealed that their heart work capacity was about 6 Wt, relative capacity--25 Wt/100 g of ventricular mass. These data correspond to those of adult humans. The Frank-Starling mechanism was corroborated.