The Course of Ductus Arteriosus from the Neonatal Period to Childhood in a Moderate Altitude Region

Area of Science:

• Neonatal Medicine
• Cardiology
• Altitude Physiology

Background:

• Patent ductus arteriosus (PDA) is a common neonatal condition.
• Altitude can potentially influence physiological processes, including cardiovascular development and closure of fetal shunts.
• Understanding PDA course in moderate altitude regions is crucial for clinical management.

Purpose of the Study:

• To evaluate the natural course and spontaneous closure rate of patent ductus arteriosus (PDA) in neonates residing in a moderate altitude region.
• To identify factors influencing the timing and success of PDA spontaneous closure.
• To determine the necessity of interventions for PDA in this specific geographic context.

Main Methods:

• Retrospective, cross-sectional study design.
• Analysis of demographic, clinical, echocardiographic, interventional, and surgical data from 711 neonates diagnosed with PDA.
• Follow-up data to assess spontaneous and intervention-based closure of the ductus arteriosus.

Main Results:

• The overall spontaneous closure rate of PDA was 86.6% (616/711) within a mean of 2.3 ± 2.8 months.
• Mean gestational age was 35.7 ± 3.1 weeks, with 330 premature infants.
• Spontaneous closure duration was negatively correlated with gestational age and weight, and prolonged in premature infants and those with hypothyroidism. Interventions were rarely required (8 surgical, 38 transcatheter).

Conclusions:

• Spontaneous closure of the ductus arteriosus is common and typically successful in moderate altitude regions.
• Prematurity and hypothyroidism are associated with a prolonged duration of spontaneous PDA closure.
• Surgical or transcatheter interventions for PDA are infrequently necessary in the early neonatal period in these areas.