Dysregulation of cardiac autonomic function in offspring exposed to alcohol during antenatal period

Area of Science:

• Cardiovascular Physiology
• Neuroscience
• Developmental Pediatrics

Background:

• Alcohol consumption during pregnancy is a known risk factor for adverse infant outcomes.
• Previous research indicates antenatal alcohol exposure affects infant cardiac autonomic function.
• Limited data exists on the long-term impact of prenatal alcohol exposure on autonomic regulation in children.

Purpose of the Study:

• To investigate the long-term effects of antenatal alcohol exposure on cardiac autonomic functions in children.
• To compare heart rate variability (HRV) parameters between children with and without prenatal alcohol exposure.
• To identify potential sympathetic nervous system predominance in children exposed to alcohol in utero.

Main Methods:

• Cardiac autonomic functions were assessed using electrocardiogram (ECG) recordings in children.
• Heart rate variability (HRV) parameters were analyzed in both time and frequency domains.
• Twenty-eight antenatal alcohol-exposed children were compared with 30 age- and gender-matched healthy controls.

Main Results:

• No significant differences in average heart rate or time-domain HRV measures were observed between groups.
• Frequency-domain analysis revealed significantly higher low frequency power, normalized units, and low frequency/high frequency ratio in the alcohol-exposed group.
• These findings suggest a shift towards sympathetic nervous system predominance in children with antenatal alcohol exposure.

Conclusions:

• Antenatal alcohol exposure has a lasting detrimental effect on cardiac autonomic regulation in children.
• The study provides evidence for sympathetic predominance in children exposed to alcohol prenatally.
• Further research is warranted to establish a causal link between antenatal alcohol exposure and autonomic dysregulation.