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Evaluation of Sleep Disorder Severity in Sleep Apnea Patients Using HRV Analysis

Research Project

Project/Area Number 22K21306
Research Category

Grant-in-Aid for Research Activity Start-up

Allocation TypeMulti-year Fund
Review Section 1002:Human informatics, applied informatics and related fields
Research InstitutionOsaka University

Principal Investigator

NAKANO Natsuko  大阪大学, 医学部附属病院, その他 (90966938)

Project Period (FY) 2022-08-31 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
Fiscal Year 2023: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2022: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Keywords睡眠時無呼吸 / 心拍変動 / 重症度
Outline of Research at the Start

閉塞性睡眠時無呼吸では過度の眠気や睡眠の質の低下、疲労感などの症状を訴えることが多く、覚醒反応による睡眠の断片化はそれら症状の原因のひとつとなっている。
一方、診断および重症度評価として汎用されている無呼吸低呼吸指数と症状の程度の相関は乏しく、終夜睡眠ポリソムノグラフィ(PSG)では皮質下覚醒反応は捉えられていない。
本研究では、PSGに記録されている心電図の心拍変動(HRV)解析を行い、自律神経バランスと睡眠への影響を評価し、HRV解析は新たなOSAの重症度の指標になりえるのかを検討する。

Outline of Final Research Achievements

In this study, HRV analysis was performed using PSG ECG data from patients with mild to moderate obstructive sleep apnea, and the results were compared between the interval without events and the interval with hypopnea in the N2 supine position, showing an increase in LF and LF/HF with hypopnea, suggesting increased sympathetic nerve activity. However, the power spectrum density (PSD) by patient showed a trend toward LF-dominant and HF-dominant types, regardless of the presence or absence of events, and LF and LF/HF values tended to be higher in patients with mild OSA. In conclusion, the results of HRV analysis may reflect not only the presence or absence of detectable respiratory events, but also the patient's respiratory pattern and electroencephalogram changes.

Academic Significance and Societal Importance of the Research Achievements

呼吸イベントだけでなく自律神経のバランスを反映しうるHRV解析を用いた本研究により,治療の必要性を過小評価する可能性のあるAHIに基づく重症度評価に替わり,HRV解析は睡眠分断の要因と睡眠の質を反映する新たな指標となり得ると考えられた。方法論の確立により,治療選択に活かされる,睡眠呼吸障害の多様性の評価が可能となる点で臨床的に意義がある。

Report

(3 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report

URL: 

Published: 2022-09-01   Modified: 2025-01-30  

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