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Related Concept Videos

Sleep Apnea01:21

Sleep Apnea

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...
Sleep-Wake Cycles01:24

Sleep-Wake Cycles

Sleep is an essential physiological process vital to maintaining overall well-being. The reticular activating system (RAS), a network of neurons in the brainstem, regulates wakefulness and sleep. While it may seem passive, sleep consists of distinct cycles, each with its unique characteristics and functions. Two key sleep phases are non-rapid eye movement (NREM) and  rapid eye movement (REM).
NREM Sleep
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Ischemic Stroke ll: Pathophysiology01:15

Ischemic Stroke ll: Pathophysiology

An ischemic stroke occurs when a cerebral blood vessel becomes obstructed, most often by a thrombus or embolus, interrupting the delivery of oxygen and glucose to brain tissue. Because neurons rely on continuous aerobic metabolism, energy failure begins within minutes of reduced perfusion. The region receiving the least blood flow becomes the infarct core, an area of irreversible cellular death. Surrounding this core lies the penumbra, a zone of hypoperfused but still viable tissue that is...
Ischemic Stroke l: Introduction01:15

Ischemic Stroke l: Introduction

Ischemic stroke is an acute cerebrovascular condition in which blood flow to a brain region is suddenly interrupted, leading to tissue infarction. Neurons depend on continuous oxygen and glucose supply, so even brief reductions in perfusion cause energy failure, ionic imbalance, and irreversible injury. Ischemic strokes are classified into thrombotic and embolic types based on their underlying mechanisms.Thrombotic MechanismsThrombotic stroke develops when a clot forms within a cerebral artery.
Stroke: Introduction and Types01:29

Stroke: Introduction and Types

A stroke is an acute neurological event caused by the sudden disruption of cerebral blood flow, leading to rapid loss of neuronal function. Neurons depend on continuous oxygen and glucose supply, so even brief interruptions can cause irreversible injury within minutes. Strokes are classified into ischemic and hemorrhagic types.Ischemic StrokeIschemic strokes are most common and occur due to arterial occlusion, depriving brain tissue of oxygen and nutrients. This leads to energy failure, ionic...
Transient Ischemic Attack l: Introduction01:26

Transient Ischemic Attack l: Introduction

A transient ischemic attack (TIA) is a brief episode of neurological dysfunction caused by a temporary, focal reduction in cerebral blood flow. Although symptoms resemble those of an ischemic stroke, the interruption in perfusion is short-lived and does not cause permanent infarction. TIAs are clinically important because they often serve as early warning events for future stroke.Mechanisms of Transient Cerebral IschemiaTransient cerebral ischemia may arise through several mechanisms. One...

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Drug-Induced Sleep Endoscopy (DISE) with Target Controlled Infusion (TCI) and Bispectral Analysis in Obstructive Sleep Apnea
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Drug-Induced Sleep Endoscopy (DISE) with Target Controlled Infusion (TCI) and Bispectral Analysis in Obstructive Sleep Apnea

Published on: December 6, 2016

Obstructive sleep apnea linked to wake-up strokes.

Sun-Wung Hsieh1, Chiou-Lian Lai, Ching-Kuan Liu

  • 1Department of Neurology, Kaohsiung Municipal Hsiao-Kang Hospital, Kaohsiung, Taiwan.

Journal of Neurology
|January 5, 2012
PubMed
Summary
This summary is machine-generated.

Obstructive sleep apnea (OSA) is linked to wake-up stroke (WUS) in mild to moderate ischemic stroke patients. Severe OSA independently predicts WUS, highlighting its importance in stroke risk assessment.

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Drug-Induced Sleep Endoscopy (DISE) with Target Controlled Infusion (TCI) and Bispectral Analysis in Obstructive Sleep Apnea
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Area of Science:

  • Neurology
  • Sleep Medicine
  • Cardiovascular Research

Background:

  • Obstructive sleep apnea (OSA) is a known risk factor for ischemic stroke.
  • The specific association between OSA and wake-up stroke (WUS) remains under-investigated.

Purpose of the Study:

  • To investigate the relationship between obstructive sleep apnea and wake-up stroke in patients with mild to moderate ischemic stroke.

Main Methods:

  • Prospective study of 71 mild to moderate ischemic stroke patients.
  • Sleep respiratory studies conducted 3-14 days post-stroke.
  • Comparison of demographic, sleep, cardiovascular, and stroke-related data between WUS and non-WUS groups.

Main Results:

  • 36.6% of patients experienced WUS.
  • WUS patients exhibited higher apnea-hypopnea index and obstructive apnea index, with lower mean blood oxygen saturation.
  • Severe sleep-disordered breathing (AHI ≥30) was the sole independent predictor of WUS (OR 6.065).

Conclusions:

  • Obstructive sleep apnea is a significant independent risk factor for wake-up stroke in mild to moderate ischemic stroke patients.
  • Clinical differentiation between WUS and non-WUS is challenging based on current data.
  • Findings underscore the importance of evaluating OSA in stroke patients, particularly those with WUS.