Why the study?
Does graded head-up tilt decrease the complexity of heart period variability in healthy subjects?
Population
17 healthy subjects
Comparison
Graded head-up tilt test with table inclination… vs Different tilt table inclinations
Design
Other, table inclination randomly chosen inside the set {0, 15, 30, 45, 60…
Authors
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Supports further exploration of entropy indices for autonomic assessment; leaves open their adoption in clinical practice pending validation.
Does graded head-up tilt decrease the complexity of heart period variability in healthy subjects?
Entropy-based complexity indices of heart period variability decrease progressively during graded head-up tilt, suggesting they can be used to monitor sympathovagal balance.
Porta et al. (2007) studied this question.
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