What causes a stroke in your sleep
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Causes of Stroke During Sleep
Introduction to Stroke and Sleep Disorders
Strokes are a leading cause of disability and death worldwide, and their incidence is expected to rise due to an aging population. Sleep disorders have been increasingly recognized as both risk factors for stroke and consequences of stroke Mayer-Suess2023Bassetti2020McDermott2018. Understanding the relationship between sleep disorders and stroke is crucial for prevention and improving outcomes.
Obstructive Sleep Apnea (OSA) and Stroke Risk
Obstructive sleep apnea (OSA) is a significant risk factor for stroke. OSA is characterized by repeated episodes of partial or complete obstruction of the upper airway during sleep, leading to disrupted sleep and intermittent hypoxia. Severe OSA can double the risk of incident stroke, particularly in young to middle-aged individuals Bassetti2020McDermott2018Lyons2015. Continuous positive airway pressure (CPAP) therapy has been shown to reduce stroke risk, especially in treatment-compliant patients Bassetti2020Lyons2015.
Other Sleep Disorders and Stroke
Insomnia and Stroke
The relationship between insomnia and stroke is less clear. While some studies suggest that insomnia may increase stroke risk, others indicate that pharmacotherapy for insomnia could potentially elevate this risk Bassetti2020McDermott2018. Insomnia is also common post-stroke and is associated with poorer outcomes Mayer-Suess2023Bassetti2020.
Periodic Limb Movements in Sleep (PLMS) and Restless Legs Syndrome (RLS)
Periodic limb movements in sleep (PLMS) have been associated with an increased risk of stroke, whereas restless legs syndrome (RLS) does not show a clear link Bassetti2020McDermott2018. Post-stroke, both PLMS and RLS are frequently observed and are linked to less favorable stroke outcomes .
Sleep-Disordered Breathing (SDB)
More than 50% of stroke patients experience sleep-disordered breathing (SDB), primarily in the form of OSA. SDB is both a risk factor for stroke and a consequence of it. The presence of SDB is linked to poorer long-term outcomes and increased stroke mortality Bassetti12005Pérez-Carbonell2020. Treatment options like CPAP and other forms of ventilation can be beneficial .
Pathophysiological Mechanisms
The pathophysiological mechanisms linking sleep disorders to stroke involve cardiovascular and neural axes. During non-REM (NREM) sleep, the body experiences autonomic tranquility, which helps restore cardiovascular homeostasis. However, disruptions in sleep, such as those caused by OSA, insomnia, or PLMS, impose stress on the cardiovascular system, increasing the risk of stroke Koo2018Cai2021.
Conclusion
Sleep disorders, particularly obstructive sleep apnea, are significant risk factors for stroke. Other sleep disturbances like insomnia and periodic limb movements in sleep also contribute to stroke risk and poorer outcomes post-stroke. Understanding and managing these sleep disorders are crucial for stroke prevention and improving recovery outcomes. Further research is needed to explore the bidirectional relationship between sleep and stroke and to develop effective treatment strategies.
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Most relevant research papers on this topic
Sleep disorders as both risk factors for, and a consequence of, stroke: A narrative review
Sleep disorders are risk factors for stroke and associated with worse stroke outcomes, and screening for these disorders after stroke may help reduce stroke risk and improve outcomes.
EAN/ERS/ESO/ESRS statement on the impact of sleep disorders on risk and outcome of stroke
Severe obstructive sleep apnoea doubles the risk of stroke, and CPAP may reduce stroke risk, while insomnia and periodic limb movements in sleep may increase stroke risk.
Sleep Disturbances as a Risk Factor for Stroke
Sleep disturbances, such as sleep restriction, sleep apnea, insomnia, and shift work, can impair cardiovascular restoration and stress the cardiovascular system, potentially increasing the risk of stroke.
Sleep disorders and stroke
Stroke sleep disorders are associated with vascular risk factors and may influence rehabilitation efforts and recurrence risk, highlighting the need for increased awareness and screening.
Sleep Disorders in Stroke: An Update on Management
Sleep disorders, such as insomnia, hypersomnia, breathing-related sleep disorders, and parasomnias, are modifiable risk factors for stroke, and effective treatment strategies are crucial for reducing their impact on stroke and related depression.
Causes of Excessive Daytime Sleepiness in Patients with Acute Stroke--A Polysomnographic Study.
Sleep-disordered breathing (SDB) is a common and treatable cause of excessive daytime sleepiness in acute stroke patients.
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