Related Experiment Videos
Metabolic rate of neonates with congenital heart disease
Insights
Newborn infants with congestive heart failure exhibit significantly higher metabolic rates and oxygen consumption compared to those with congenital heart disease alone. This indicates increased energy demands in neonates experiencing heart failure.
Area of Science:
- Neonatal physiology
- Pediatric cardiology
- Metabolic research
Background:
- Congestive heart failure (CHF) in infants presents unique physiological challenges.
- Understanding metabolic demands is crucial for managing pediatric cardiac conditions.
- Previous studies suggested increased metabolic rates in older children with heart failure.
Purpose of the Study:
- To investigate metabolic rate and oxygen consumption in newborn infants with controlled CHF.
- To compare these parameters with infants having congenital heart disease (CHD) but without heart failure.
- To determine if elevated metabolic demands associated with heart failure extend to the neonatal period.
Main Methods:
- Measured oxygen consumption (Vo2), respiratory quotient (RQ), and metabolic rate in two groups of infants under one month of age.
- Group 1: Seven infants with controlled congestive heart failure.
- Group 2: Infants with congenital heart disease not in heart failure.
Main Results:
- Infants with CHF showed a significantly higher mean oxygen consumption (9.4 ml/kg/min) compared to the non-failure CHD group (6.5 ml/kg/min).
- Mean metabolic rate was significantly elevated in the CHF group (63 cal/kg/24h) versus the non-failure CHD group (45 cal/kg/24h).
- Respiratory quotient differed between groups (0.71 in CHF vs. 0.80 in non-failure CHD), with statistical significance (P < 0.001) for all parameters.
Conclusions:
- Congestive heart failure in newborns is associated with a significantly greater metabolic rate and oxygen consumption.
- These findings confirm that increased energy expenditure due to heart failure is present even in the neonatal period.
- This highlights the critical metabolic burden on neonates with CHF, impacting nutritional and therapeutic strategies.
Abstract:
Seven infants under one month of age with controlled congestive heart failure showed a mean oxygen consumption of 9-4 +/- 1-6 SD ml/kg per min, a mean respiratory quotient of 0-71 +/- 0-05 SD, and a mean metabolic rate of 63 +/- 12 SD cal/kg per 24 h. This compares with a group of infants with congenital heart disease not in heart failure with Vo2 of 6-5 +/- 1-2 SD ml/min per kg, respiratory quotient of 0-80 +/- 0-11 SD, and basal metabolic rate of 45 +/- 8 SD cal/kg per 24 h. These differences are significant (P less than 0.001). The findings of a greater metabolic rate associated with congestive heart failure are thus extended to the newborn period.