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関連する概念動画

Regulation of Heart Rates01:31

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The regulation of heart rate is a complex process controlled by the autonomic nervous system (ANS), hormonal influences, and intrinsic cardiac mechanisms. The ANS has two main components: the sympathetic nervous system (SNS) and the parasympathetic nervous system (PNS).
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Certain organic substances change color in dilute solution when the hydronium ion concentration reaches a particular value. For example, phenolphthalein is a colorless substance in any aqueous solution with a hydronium ion concentration greater than 5.0 × 10−9 M (pH < 8.3). In more basic solutions where the hydronium ion concentration is less than 5.0 × 10−9 M (pH > 8.3), it is red or pink. Substances such as phenolphthalein, which can be used to determine the pH of a solution, are...
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Factors Influencing Heart Rate01:30

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The heart rate, or pulse rate, is a vital indicator of cardiovascular health. It reflects the number of times the heart beats per minute. Various physiological and environmental factors influence heart rate, increasing or decreasing cardiac output. Understanding these factors is crucial for assessing heart function and identifying potential health issues.
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Cardiac Output I:Effect of Heart Rate on Cardiac Output01:19

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Cardiac output (CO) refers to the total amount of blood ejected by one of the ventricles in liters per minute (L/min). In a resting adult, CO ranges from 5 to 6 L/min, adjusting according to the body's metabolic requirements.
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Inverse Hyperbolic Functions and Their Derivatives01:25

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The shape of a suspension bridge cable hanging under its own weight is described by a catenary curve, which is modeled using the hyperbolic cosine function. This mathematical model accurately captures the balance between gravity and tension acting along the cable. When a particular vertical position on the cable is known, the corresponding horizontal position can be determined using the inverse hyperbolic cosine function, allowing for a detailed analysis of the cable's geometry.Inverse...
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Variability: Analysis01:11

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Measures of variability are statistical metrics that reveal the dispersion pattern within a dataset. They are pivotal in biostatistics, providing insights into the heterogeneity within health and biological data. Variability signifies the degree to which data points diverge from one another, helping researchers understand the potential range of values and associated uncertainty within the data.
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Updated: Jan 23, 2026

Autonomic Function Following Concussion in Youth Athletes: An Exploration of Heart Rate Variability Using 24-hour Recording Methodology
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循環好中球数および単球数は心拍変動指標と逆相関する：マーストリヒトスタディ

Haifa Maalmi1,2, Kristiaan Wouters3,4, Nicolaas C Schaper3

  • 1German Diabetes Center (DDZ), Institute for Clinical Diabetology, Leibniz Center for Diabetes Research at Heinrich Heine Universität Düsseldorf Germany.

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まとめ

好中球および単球数の増加は、心臓自律神経機能の指標である心拍変動（HRV）の低下と関連している。これらの所見は、性別やグルコース状態に関係なく、自然免疫細胞が心臓の健康に関与していることを示唆している。

キーワード:
心拍変動指標免疫細胞リンパ球単球好中球

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科学分野:

  • 循環器病学
  • 免疫学
  • 公衆衛生学

背景:

  • 心拍変動（HRV）は心臓自律神経系の機能を反映する。
  • 免疫細胞、特に白血球は、HRVの低下に関与していることが示唆されている。
  • 白血球の特定の役割と、性別やグルコース代謝との関連は依然として不明である。

研究 の 目的:

  • 白血球数とHRV指標との横断的関連を調査する。
  • 白血球とHRVの関係を性別またはグルコース代謝状態が修飾するかどうかを検討する。

主な方法:

  • マーストリヒトスタディの1888人の参加者のデータを利用した。
  • 自動血球計数およびフローサイトメトリーにより、白血球サブセット（好中球、単球、リンパ球など）を測定した。
  • 24時間ECGを用いてHRVを評価し、時間領域および周波数領域のスコアを算出した。

主要な成果:

  • 好中球および単球数の増加は、時間領域および周波数領域のHRVスコアの低下と有意に関連していた。
  • これらの関連は、複数の共変量を調整した後も有意であった。
  • 性別またはグルコース代謝状態による有意な効果修飾は観察されなかった。

結論:

  • 一般集団において、好中球および単球レベルの上昇は、HRVの低下と相関する。
  • これらの所見は、自然免疫プロセスおよび炎症が心臓自律神経機能障害に関与している可能性を強調する。
  • 観察された関連は、性別およびグルコース代謝状態とは独立している。