Key result
Non-dipping heart rate fails to independently predict adverse maternal-fetal outcomes in high-risk pregnancies.
Why the study?
Given shared autonomic mechanisms underlying nocturnal blood pressure elevation, it was unknown whether a non-dipping heart rate pattern provides additional prognostic information in high-risk pregnancies.
Does a non-dipping heart rate profile predict adverse maternal-fetal outcomes in high-risk pregnant women evaluated between 20 and 34 weeks of gestation?
Population
1336 high-risk pregnant women evaluated between 20 and 34 weeks of gestation
Comparison
Non-dipping heart rate pattern vs dipping heart rate pattern
Design
Retrospective cohort study
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Non-dipping heart rate associates with higher BP in hypertensive pregnancy but loses outcome prediction after adjustment; leaves open incremental ABPM value.
Cohort (n=1,336)
Does a non-dipping heart rate profile predict adverse maternal-fetal outcomes in high-risk pregnant women evaluated between 20 and 34 weeks of gestation?
A non-dipping heart rate pattern on 24-hour ambulatory monitoring does not provide independent prognostic value for adverse maternal-fetal outcomes in high-risk pregnancies beyond standard clinical and blood pressure parameters.
A 2026 study conducted a cohort in High-risk pregnancies (n=1,336). Non-dipping heart rate pattern vs. Dipping heart rate pattern was evaluated on Maternal and fetal outcomes including preeclampsia/eclampsia/HELLP syndrome, preterm birth, and low birth weight. A non-dipping heart rate pattern, observed in 39% of high-risk pregnancies, does not independently predict adverse maternal-fetal outcomes after adjusting for established clinical risk factors.
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