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The changing spectrum of hypertension in premature infants

K Farnbach1, S Iragorri1, A Al-Uzri1

  • 1Oregon Health & Science University, 707 SW Gaines St., Portland, Oregon, USA.

Journal of Perinatology : Official Journal of the California Perinatal Association
|August 8, 2019
PubMed

Insights

Systemic hypertension in premature infants has shifted, with low plasma renin activity (PRA) now predominant. This change may be linked to phthalate exposure from medical equipment.

Area of Science:

  • Neonatal Medicine
  • Pediatric Cardiology
  • Environmental Health

Background:

  • Systemic hypertension (HTN) in premature infants presents unique diagnostic and management challenges.
  • Understanding the evolving causes of hypertension in this vulnerable population is crucial for timely intervention.

Purpose of the Study:

  • To document shifts in the etiologic spectrum of hypertension among premature infants.
  • To investigate potential contributing factors, such as phthalate exposure, to these changes.

Main Methods:

  • Retrospective review of 130 hypertensive episodes in premature infants across two centers over 8 years.
  • Categorization of hypertension based on established criteria (Flynn et al., 2012).
  • Analysis of diagnosis frequency, time course, diagnostics, and comparison of phthalate exposure.

Main Results:

  • Pulmonary and miscellaneous causes constituted the majority (65% and 16%) of hypertension cases.
  • Nearly all hypertensive infants exhibited undetectable or low plasma renin activity (PRA).
  • Pulmonary, medication/intoxication, and miscellaneous categories were associated with near 40 weeks postmenstrual age, low PRA, and significant phthalate exposure.

Conclusions:

  • The etiology of hypertension in premature infants has shifted from high PRA to low PRA dominant cases.
  • Phthalate exposure, potentially from medical devices and fluids, is a likely contributor to the observed changes in hypertension spectrum.
Abstract

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