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Transcutaneous Microcirculatory Imaging in Preterm Neonates
06:27

Transcutaneous Microcirculatory Imaging in Preterm Neonates

Published on: December 31, 2015

Abnormal circulatory stress responses of preterm graduates

Gary Cohen1, Hugo Lagercrantz, Miriam Katz-Salamon

  • 1Department of Women and Child Health, Neonatal Unit, Karolinska Institute, S-171 76 Stockholm, Sweden.

Pediatric Research
|February 23, 2007
PubMed

Insights

Premature birth and bronchopulmonary dysplasia alter infant cardiovascular responses to CO2. These circulatory dysfunctions persist and may signal future hypertension and heart disease risks.

Area of Science:

  • Neonatal physiology
  • Cardiovascular research
  • Respiratory medicine

Background:

  • Preterm birth and bronchopulmonary dysplasia (BPD) are linked to later hypertension and cardiovascular disease.
  • Early circulatory dysfunction may underlie these long-term risks.
  • Understanding perinatal complication effects on infant cardiovascular regulation is crucial.

Purpose of the Study:

  • To investigate early circulatory dysfunction in infants with perinatal complications.
  • To assess cardiovascular and heart rate responses to hypercapnia in term and preterm infants.
  • To identify potential early markers of long-term cardiovascular risk.

Main Methods:

  • Compared blood pressure (BP) and heart rate (HR) responses to 4% CO2 breathing in quiet sleep.
  • Included term infants (n=12), preterm infants without complications (n=12), and preterm infants with BPD (n=10).
  • Utilized Finometer for BP measurement.

Main Results:

  • Term infants showed accelerated HR and increased BP with CO2.
  • Preterm infants exhibited altered responses: exaggerated BP with blunted HR (mild BPD) or diminished BP response with decreased HR (severe BPD).
  • Cardiovascular reflex control was impaired by premature birth, especially in severe BPD.

Conclusions:

  • Short-term reflex cardiovascular control is altered by premature birth and BPD.
  • These cardiovascular anomalies persist beyond the expected term age.
  • Altered responses may represent early signs of emerging long-term cardiovascular dysfunction.

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