Key result
Head-up tilting in sleeping infants triggers a rapid biphasic HR and BP response.
Why the study?
Do provocative tests of autonomic activity (head-up tilting, cold face test, loud noise) elicit cardiovascular responses in normal sleeping infants?
Population
12 normal infants, age 13 +/- 2 (SD) weeks
Comparison
Three provocative tests of autonomic activity… vs Pretest baseline values
Design
Other
Authors
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Supports early autonomic maturation in infants; leaves open whether tilt testing aids clinical autonomic assessment.
Observational (n=12)
Do provocative tests of autonomic activity (head-up tilting, cold face test, loud noise) elicit cardiovascular responses in normal sleeping infants?
At 3 months of age, normal infants demonstrate an adult-like biphasic cardiovascular response to postural challenge, suggesting early maturation of neural autonomic control.
Harrington et al. (2001) conducted an observational in Normal infants (n=12). Provocative tests of autonomic activity (head-up tilting, cold face test, loud noise) vs. Pretest baseline was evaluated on Heart rate and blood pressure response to head-up tilting. Head-up tilting in sleeping infants elicited a rapid biphasic heart rate (mean increase 16%, decrease 21%) and blood pressure response (mean increase 16%, decrease 16%).
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