Format

Send to

Choose Destination
Acta Psychiatr Scand. 2016 Jan;133(1):44-52. doi: 10.1111/acps.12498. Epub 2015 Sep 15.

Reduced heart rate variability in schizophrenia and bipolar disorder compared to healthy controls.

Author information

1
NORMENT, KG Jebsen Centre for Psychosis Research, Division of Mental Health and Addiction, Oslo University Hospital, University of Oslo, Oslo, Norway.
2
Department of Psychology, University of Oslo, Oslo, Norway.
3
Drammen Outpatient Clinic, Clinic of Mental Health and Addiction, Vestre Viken Hospital Trust, Drammen, Norway.

Abstract

OBJECTIVE:

Despite current diagnostic systems distinguishing schizophrenia (SZ) and bipolar disorder (BD) as separate diseases, emerging evidence suggests they share a number of clinical and epidemiological features, such as increased cardiovascular disease (CVD) risk. It is not well understood if poor cardiac autonomic nervous system regulation, which can be indexed non-invasively by the calculation of heart rate variability (HRV), contributes to these common CVD risk factors in both diseases.

METHOD:

We calculated HRV in 47 patients with SZ, 33 patients with BD and 212 healthy controls. Measures of symptom severity were also collected from the patient groups.

RESULTS:

Heart rate variability was significantly reduced in both these disorders in comparison with the healthy participants; however, there were no HRV differences between disorders. Importantly, these reductions were independent of the medication, age or body mass index effects. There was also preliminary evidence that patients with reduced HRV had increased overall and negative psychosis symptom severity regardless of SZ or BD diagnosis.

CONCLUSION:

We suggest that HRV may provide a possible biomarker of CVD risk and symptom severity in severe mental illness. Thus, our results highlight the importance of cardiometabolic screening across SZ and bipolar spectrum disorders.

KEYWORDS:

autonomic nervous system; bipolar disorder; heart rate variability; schizophrenia

PMID:
26371411
DOI:
10.1111/acps.12498
[Indexed for MEDLINE]

Supplemental Content

Full text links

Icon for Wiley
Loading ...
Support Center