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Updated: Jan 4, 2026
Non-invasive Optical Measurement of Cerebral Metabolism and Hemodynamics in Infants
Published on: March 14, 2013
Abnormalities in cerebral hemodynamics and changes with surgical intervention in neonates with congenital heart
Henry H Cheng1, Silvina L Ferradal2, Rutvi Vyas2
1Department of Cardiology, Boston Children's Hospital, Boston, Mass.
Insights
Congenital heart disease (CHD) in neonates affects cerebral blood flow and oxygen use. Some CHD types show altered hemodynamics, suggesting compensatory mechanisms that may impact outcomes.
Area of Science:
- Neonatal physiology
- Cerebral hemodynamics
- Congenital heart disease
Background:
- Congenital heart disease (CHD) encompasses a range of conditions affecting heart structure and function in neonates.
- Understanding perioperative cerebral hemodynamics is crucial for managing neonates with CHD.
- Diverse CHD subtypes may exhibit distinct physiological responses.
Purpose of the Study:
- To investigate perioperative cerebral hemodynamics in neonates with different types of CHD.
- To compare cerebral hemodynamics between CHD groups and healthy controls.
- To assess changes in cerebral hemodynamics and oxygen metabolism before and after surgery within CHD groups.
Main Methods:
- Utilized frequency-domain near-infrared spectroscopy and diffuse correlation spectroscopy.
- Measured cerebral oxygen saturation, cerebral blood volume, and cerebral blood flow index.
- Calculated cerebral oxygen extraction fraction (OEF) and indexed cerebral metabolic rate of oxygen consumption.
Main Results:
- Neonates with single ventricle (SV) CHD showed significantly lower preoperative cerebral blood flow index compared to controls.
- Transposition of the great arteries (TGA) and SV groups exhibited higher preoperative OEF than controls.
- Postoperative TGA neonates had increased arterial oxygen saturation and decreased OEF compared to their preoperative state.
Conclusions:
- Distinct cerebral hemodynamic and oxygen metabolism differences exist between CHD neonates and controls.
- Elevated OEF in TGA and SV groups may represent a compensatory response.
- Further research is needed to link these hemodynamic metrics to clinical outcomes and guide interventions.
Objective:
To use novel optical techniques to measure perioperative cerebral hemodynamics of diverse congenital heart disease (CHD) groups (two-ventricle, d-transposition of the great arteries [TGA], and single ventricle [SV]) and (1) compare CHD groups with healthy controls preoperatively and (2) compare preoperative and postoperative values within each CHD group.
Methods:
Frequency-domain near-infrared spectroscopy and diffuse correlation spectroscopy were used to measure cerebral oxygen saturation, cerebral blood volume, cerebral blood flow index, cerebral oxygen extraction fraction (OEF, calculated using arterial oxygen saturation and cerebral oxygen saturation), and an index of cerebral metabolic rate of oxygen consumption in control and CHD neonates. Preoperative CHD measures were compared with controls. Preoperative and postoperative measures were compared within each CHD group.
Results:
In total, 31 CHD neonates (7 two-ventricle, 11 TGA, 13 SV) and 13 controls were included. Only neonates with SV CHD displayed significantly lower preoperative cerebral blood flow index (P < .04) than controls. TGA and SV groups displayed greater OEF (P < .05) during the preoperative period compared with controls. Compared with the preoperative state, postoperative neonates with TGA had a greater arterial oxygen saturation with lower OEF.
Conclusions:
Differences in cerebral hemodynamics and oxygen metabolism were observed in diverse CHD groups compared with controls. Increased OEF appears to be a compensatory mechanism in neonates with TGA and SV. Studies are needed to understand the relationship of these metrics to outcome and their potential to guide interventions to improve outcome.
