Recent research published in Sleep Medicine Reviews indicates that individuals suffering from insomnia face a 26% higher risk of stroke. The study analyzed data from 1.3 million participants across six previous studies examining various health risk factors. Insomnia is defined as difficulty falling or staying asleep or obtaining quality sleep for at least three nights a week.
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In addition to the increased risk of stroke, the findings also revealed a 28% higher risk of hospitalization for any reason among those with insomnia. Experts suggest that the relationship between sleep disturbances and stroke is complex. Beth Malow, M.D., a neurologist and chief of the Division of Sleep Disorders at Vanderbilt Health, noted that sleep impacts many facets of health and should be prioritized.
This association is not new; a 2023 analysis in Neurology determined that adults reporting insomnia symptoms had a greater likelihood of experiencing a stroke during a nine-year follow-up, especially among those under 50 years old. The mechanisms behind this link involve increased inflammation, blood clot formation, and higher cortisol levels due to disrupted sleep, as explained by Christopher Yi, M.D., a vascular surgeon at MemorialCare Orange Coast Medical Center. These factors can contribute to elevated blood pressure and heart rate, potentially leading to plaque buildup in arteries.
Furthermore, insomnia may adversely affect metabolism, heightening the risk of weight gain, diabetes, and high cholesterol—all stroke risk factors. Dr. Winter elaborated that the relationship between insomnia and stroke may be bidirectional; those more susceptible to strokes may also experience sleep disturbances.
While the study did not explore the impact of insomnia treatment on stroke risk, it's emphasized that addressing sleep issues can mitigate factors contributing to stroke. Treatments for insomnia vary from enhancing sleep hygiene to medication and cognitive behavioral therapy. Dr. Winter noted the importance of identifying underlying causes, whether they are related to sleep apnea, anxiety, or other medical conditions.
If sleep issues persist despite lifestyle changes, consulting a healthcare professional is advised. Dr. Malow encourages reaching out to a primary care provider or a sleep specialist to rule out medical issues like obstructive sleep apnea. Early intervention is crucial, as both insomnia and cardiovascular conditions can be managed more effectively when addressed promptly.