Heart rate and blood pressure control in infants exposed to maternal cigarette smoking.

Autor: Viskari-Lähdeoja S; Hospital for Children and Adolescents, Helsinki, Finland., Hytinantti T, Andersson S, Kirjavainen T
Jazyk: angličtina
Zdroj: Acta paediatrica (Oslo, Norway : 1992) [Acta Paediatr] 2008 Nov; Vol. 97 (11), pp. 1535-41. Date of Electronic Publication: 2008 Aug 06.
DOI: 10.1111/j.1651-2227.2008.00966.x
Abstrakt: Aim: Exposure to maternal cigarette smoking is a major risk factor for sudden infant death syndrome (SIDS). Foetal and postnatal smoke-exposure may alter cardiovascular control in infants. We studied heart rate (HR) and blood pressure (BP) responses in smoke-exposed infants.
Methods: Eleven infants exposed to maternal cigarette smoking were studied at the age of 12 +/- 2.1 (range 10-16) weeks. Twenty healthy, age-matched infants from non-smoking families served as controls. During confirmed slow-wave sleep (NREM3), 3-5 sec side motion and 45 sec 45 degrees head-up tilt tests were performed.
Results: Control infants showed consistent biphasic HR and BP responses to side motion, with an initial 2-5% increase followed by a 2% decrease (p < 0.0001). In smoke-exposed infants, the initial HR (p = 0.009) and BP responses (p < 0.0001) were markedly reduced, and the subsequent decrease in BP was more prominent (systolic blood pressure, SBP, p = 0.005; diastolic blood pressure, DBP, p = 0.03). No differences were observed between the groups in tilt test results, HR variability or HR responses to spontaneous arousals.
Conclusion: Maternal cigarette smoking may alter vestibulo-mediated cardiovascular control in early infancy. This may contribute to increased SIDS risk.
Databáze: MEDLINE
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