相关实验视频
Updated: Jun 9, 2025
09:54
A Model to Simulate Clinically Relevant Hypoxia in Humans
Published on: December 22, 2016
8.8K
睡眠呼吸暂停的低血压负荷与T波振幅的急性变化有关
Saara Sillanmäki1,2,3, Serajeddin Ebrahimian1,4,3, Salla Hietakoste1,4
1Diagnostic Imaging Center, Kuopio University Hospital, Kuopio, Finland.
ERJ open research
|October 29, 2024
概括
在阻塞性睡眠呼吸暂停 (OSA) 中,夜间脱显著改变心脏复极化. 睡眠期间更深的氧气下降与心室复极化不稳定性增加有关,这是心脏事件的危险因素.
科学领域:
- 心脏病学 心脏病学
- 睡眠医学 睡眠医学
- 电子生理学 电子生理学
背景情况:
- 阻塞性睡眠呼吸暂停 (OSA) 对心血管系统造成重大压力.
- 低血对睡眠期间心脏电生理学的直接影响尚不清楚.
- 了解这些影响对于管理与OSA相关的心血管风险至关重要.
研究的目的:
- 调查夜间氧气脱和心脏复极化的严重程度之间的关系.
- 探索脱度的大小和持续时间如何影响T波振幅变化.
- 为了确定OSA患者心血管风险的潜在电生理学标志物.
主要方法:
- 对492名患者的心电图进行了回顾性分析,这些患者因怀疑OSA而接受了多睡眠学.
- 在9137次脱事件期间和之后的T波幅变化 (平均值和SD) 的量化.
- 根据男性和女性的脱度持续时间和氧和度下降幅度 (ΔSpO) 的亚组分析.
主要成果:
- 夜间脱度导致T波幅 (ΔTamp_mean) (p<0.01) 发生显著变化.
- 在男性中,更深度的脱度 (ΔSpO ≥7.5%) 在脱过程中显示了21μV和脱后24μV的中位 ΔTamp_mean.
- 脱度深度是心室复极化不稳定性的独立预测指标.
结论:
- 夜间脱和心脏复极化不稳定之间存在显著的关联.
- 增加复极化不稳定性与心血管疾病相关.
- 这些发现突出了一个潜在的机制,将OSA,脱和不良心脏结果联系在一起,包括心律失常和心脏突然死亡.
相关概念视频
01:21Sleep Apnea
130
Sleep apnea is a condition where breathing stops intermittently during sleep, often leading to significant health issues. Each episode can last from 10 to 20 seconds or more and is frequently accompanied by a brief arousal from sleep. This disturbance, largely unnoticed by the individual, can lead to severe daytime fatigue. Commonly, individuals seek help after being informed by their partners about loud snoring and noticeable breathing pauses during sleep.
The condition is more prevalent among...
The condition is more prevalent among...
130
01:23Hypoxia
947
Hypoxia is a medical condition characterized by an inadequate oxygen supply to body tissues. It typically manifests as a bluish discoloration of the skin and mucosae, especially in fair-skinned individuals, when hemoglobin (Hb) saturation drops below 75%.
Types of Hypoxia
There are four primary types of hypoxia, each resulting from a different cause:
1. Anemic hypoxia: This type occurs due to insufficient oxygen delivery caused by a lack of red blood cells (RBCs) or RBCs with abnormal or...
Types of Hypoxia
There are four primary types of hypoxia, each resulting from a different cause:
1. Anemic hypoxia: This type occurs due to insufficient oxygen delivery caused by a lack of red blood cells (RBCs) or RBCs with abnormal or...
947
01:21Acute Respiratory Failure-II
174
Type I Respiratory Failure, or hypoxemic respiratory failure, occurs when the partial pressure of oxygen (PaO2) in arterial blood falls below 60 mmHg while breathing room air without a corresponding increase in arterial carbon dioxide levels (PaCO2). This condition highlights a significant impairment in the lungs' capacity to oxygenate the blood.
The underlying physiological abnormalities that contribute to hypoxemic respiratory failure include:
The underlying physiological abnormalities that contribute to hypoxemic respiratory failure include:
174
01:23Acute Respiratory Failure-IV
129
Respiratory failure can manifest suddenly or gradually, characterized by a rapid decline in PaO2 and a rapid rise in PaCO2. This situation indicates a severe respiratory problem that may quickly become a life-threatening emergency. One of the early signs of hypoxemic Acute Respiratory Failure (ARF) is a change in mental status due to the brain's sensitivity to oxygen levels and changes in acid-base balance. Symptoms such as restlessness, confusion, and agitation suggest inadequate oxygen...
129
01:26Respiratory Volumes and Capacities I
961
Assessing the respiratory rate and rhythm for a complete minute is crucial for evaluating the breathing pattern. Even a minor increase in the patient's average respiratory rate, by as little as three to five breaths per minute, is an early and vital indicator of respiratory distress. Patients with a respiratory rate exceeding twenty-four breaths per minute require close monitoring to determine the physiological alterations. This careful observation is essential for prompt recognition and...
961
01:30Alterations in Respiration II
827
There are numerous types of normal and abnormal respiration. Based on ventilatory movements, breathing patterns are classified as regular, deep, or shallow. Examples include Biot's breathing, Cheyne-Stokes respiration, Kussmaul's breathing, hyperventilation, and hypoventilation. Each pattern is clinically significant and aids in evaluating patients.
In Biot's breathing, the respiratory rate and depth are irregular, alternating between periods of deep gasping and apnea. Common causes...
In Biot's breathing, the respiratory rate and depth are irregular, alternating between periods of deep gasping and apnea. Common causes...
827