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Cardiovascular changes during phototherapy in newborns.

K Javorka1, L Nandrážiová, Z Uhríková

  • 1Department of Physiology, Jessenius Faculty of Medicine, Comenius University, Martin, Slovak Republic. kamil.javorka@uniba.sk.

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Summary
This summary is machine-generated.

Phototherapy for neonatal hyperbilirubinemia can alter cardiovascular function, causing skin vasodilation and changes in blood flow. However, infant cardiovascular systems generally adapt well, with no impact on ductal patency.

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Area of Science:

  • Neonatology
  • Pediatric Cardiology
  • Physiology

Background:

  • Neonatal hyperbilirubinemia is common and typically treated with phototherapy.
  • Phototherapy, while effective, may induce cardiovascular side effects.
  • Understanding these cardiovascular changes is crucial for infant safety.

Purpose of the Study:

  • To investigate the cardiovascular system's response to phototherapy in newborns.
  • To assess changes in blood flow, cardiac output, and autonomic nervous system activity.
  • To determine phototherapy's effect on ductal patency and heart rate variability.

Main Methods:

  • Non-invasive monitoring of cardiovascular parameters during phototherapy.
  • Analysis of heart rate variability (HRV) using symbolic dynamics.
  • Comparison of responses in preterm and term newborns.

Main Results:

  • Phototherapy causes cutaneous vasodilation, increased skin perfusion, and altered blood flow distribution (cerebral, splanchnic, renal).
  • Systemic blood pressure decreased, heart rate increased, and cardiac output slightly reduced (mainly in preterm infants).
  • Phototherapy did not affect ductal patency; HRV analysis indicated a shift towards sympathetic activity.

Conclusions:

  • The neonatal cardiovascular system demonstrates physiological adaptability during phototherapy.
  • Phototherapy induces predictable hemodynamic and autonomic changes, generally well-tolerated in healthy newborns.
  • These findings support the safe application of phototherapy in managing neonatal hyperbilirubinemia.