Attention-deficit/hyperactivity disorder and task-related heart rate variability: A systematic review and meta-analysis

Neurosci Biobehav Rev. 2019 Apr:99:11-22. doi: 10.1016/j.neubiorev.2019.01.022. Epub 2019 Jan 24.

Abstract

Background: Research suggests that Attention-Deficit/Hyperactivity Disorder (ADHD) is associated with autonomic nervous system dysregulation, but the findings were mixed.

Method: We conducted a literature review and meta-analysis to quantify the effect of ADHD on vagally-mediated heart rate variability (HRV). PsycINFO, PubMed, Web of Science and Scopus, were searched for case-control or cohort studies reporting measures of vagally-mediated HRV, after a task demand, among individuals with ADHD relative to healthy subjects.

Results: Thirteen articles comprising a total of 869 patients with ADHD and 909 healthy participants were included. As compared to controls, ADHD patients had reduced vagally-mediated HRV, corresponding to a small effect size (Hedge's g = 0.20; CI 95% 0.01 to 0.40). Heterogeneity was high (Q (18) = 76.59, p < 0.001; I² = 77%). There was some evidence of small study effects. Task type, respiration rate assessment and associated comorbid disorders were statistically significant moderators.

Conclusions: These findings provide evidence for the associations between ADHD and autonomic dysregulation. Future studies addressing HRV reactivity are needed.

Keywords: Attention deficit hyperactivity disorder; Cardiac vagal control; Heart rate variability; Meta-analysis; Vagally-mediated HRV.

Publication types

  • Meta-Analysis
  • Research Support, Non-U.S. Gov't
  • Systematic Review

MeSH terms

  • Attention Deficit Disorder with Hyperactivity / drug therapy
  • Attention Deficit Disorder with Hyperactivity / physiopathology*
  • Behavior / drug effects
  • Central Nervous System Stimulants / therapeutic use*
  • Heart Rate / physiology*
  • Humans
  • Methylphenidate / therapeutic use
  • Vagus Nerve / drug effects*
  • Vagus Nerve / physiology

Substances

  • Central Nervous System Stimulants
  • Methylphenidate