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Atrial Fibrillation and Objective Sleep Quality by Slow Wave Sleep.

Younghoon Kwon1, Sneha Gadi1, Neil R Shah1

  • 1Cardiovascular Division, Department of Medicine, University of Virginia.

Journal of Atrial Fibrillation
|December 4, 2018
PubMed
Summary
This summary is machine-generated.

Patients with atrial fibrillation (AF) experience poorer sleep quality, evidenced by significantly less slow wave sleep (SWS). This objective measure indicates impaired restorative sleep in individuals with AF.

Keywords:
Atrial FibrillationSleep ApneaSlow Wave Sleep

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Area of Science:

  • Cardiology
  • Sleep Medicine
  • Medical Research

Background:

  • Self-reported poor sleep quality is frequently observed in patients diagnosed with atrial fibrillation (AF).
  • Slow wave sleep (SWS) is a critical, restorative sleep stage and an objective indicator of sleep quality.

Purpose of the Study:

  • To quantitatively compare the duration of slow wave sleep (SWS) between patients diagnosed with atrial fibrillation (AF) and those without AF.

Main Methods:

  • A case-control study design was employed, including 205 subjects (139 with AF, 66 without AF) from polysomnography data.
  • Exclusion criteria included medications affecting sleep architecture; analyses adjusted for age, gender, BMI, and sleep apnea.
  • Logistic regression was used to assess the association between AF and SWS duration (low vs. high).

Main Results:

  • Patients with AF exhibited significantly lower mean SWS duration (11.1 min) compared to controls (16.6 min, p=0.02).
  • Multivariable analysis confirmed that prevalent AF was independently associated with reduced SWS (OR 2.5 [1.3, 5.0], p=0.006).
  • Analysis excluding patients with less than 4 hours of total sleep time yielded even stronger results (OR 3.9 [1.7, 9.7], p=0.002).

Conclusions:

  • Atrial fibrillation (AF) is objectively associated with impaired sleep quality, characterized by a reduced amount of slow wave sleep (SWS).
  • Further research is warranted to elucidate the complex mechanistic interplay between AF and sleep disturbances.