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Echocardiographic Evaluation of Transitional Circulation for the Neonatologists
Yogen Singh1,2, Cécile Tissot3
1Consultant in Neonatology and Pediatric Cardiology, Cambridge University Hospitals NHS Foundation Trust, Cambridge, United Kingdom.
Frontiers in Pediatrics
|June 6, 2018
Summary
The transition from fetal to neonatal circulation involves critical hemodynamic changes, including shifts in pulmonary and systemic vascular resistance. Understanding these adaptations is vital for neonates, especially those with congenital heart defects.
Area of Science:
- Neonatal Physiology
- Cardiovascular Adaptation
Background:
- The first breaths after birth trigger significant hemodynamic shifts, transitioning circulation from placental to pulmonary oxygenation.
- This transition is crucial for neonatal survival and involves complex changes in pulmonary vascular resistance (PVR) and systemic vascular resistance (SVR).
Purpose of the Study:
- To elucidate the critical hemodynamic adaptations during the neonatal circulatory transition.
- To highlight the importance of understanding these changes for managing neonates, particularly those with congenital heart defects (CHDs).
Main Methods:
- Review of physiological mechanisms governing fetal to neonatal circulatory transition.
- Discussion on the role of bedside echocardiography in assessing hemodynamic changes and shunting.
Main Results:
- Successful transition relies on decreased PVR and increased SVR.
- Altered transition physiology can influence the presentation of CHDs.
Conclusions:
- Understanding neonatal circulatory transition is essential for clinical practice.
- Bedside echocardiography aids in evaluating hemodynamic changes and guiding clinical decisions in neonates with altered physiology.
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