Loss of consciousness during stroke
Pro Research Analysisby 
Searched over 200M research papers
Incidence and Prevalence of Loss of Consciousness During Stroke
Loss of consciousness (LOC) or disorders of consciousness are common during both ischemic and hemorrhagic strokes. Studies show that about 14–35% of patients with acute ischemic stroke present with early consciousness disorder (ECD) or impaired LOC at admission, while in hemorrhagic stroke, the prevalence of altered LOC at admission can be as high as 39% 2345+1 MORE.
Risk Factors for Loss of Consciousness in Stroke
Several factors increase the risk of LOC during stroke. For ischemic stroke, advanced age, higher stroke severity (as measured by the NIH Stroke Scale), and massive cerebral infarcts are significant risk factors 23. In hemorrhagic stroke, factors such as larger hematoma size, hydrocephalus, high body temperature, low hemoglobin, elevated glucose, and female gender are associated with a higher risk of coma or impaired consciousness at admission 56. Additionally, complications like late seizures, stroke progression, and the need for craniectomy are linked to persistent LOC at three months after hemorrhagic stroke .
Prognostic Implications of Loss of Consciousness
Loss of consciousness at stroke onset is strongly associated with worse outcomes. Patients with impaired LOC have higher rates of in-hospital mortality, more frequent stroke-related complications, and are less likely to be discharged home or to rehabilitation 2347+1 MORE. In both ischemic and hemorrhagic strokes, impaired LOC predicts greater disability at three months and a higher likelihood of discharge to skilled nursing facilities rather than rehabilitation centers 78. The presence of coma or low Glasgow Coma Scale (GCS) scores at admission is also linked to poor functional outcomes and lower chances of recovery 16.
Impact of Withdrawal of Life-Sustaining Treatment (WLST)
Decisions to withhold or withdraw life-sustaining treatment (WLST) are more common in patients with impaired LOC. This decision significantly mediates the relationship between LOC and mortality, especially in both ischemic and hemorrhagic stroke populations 348. Early WLST (within two days) is particularly influential in increasing mortality rates among these patients, although recent guidelines have led to a reduction in early WLST decisions 38.
Modifiable and Non-Modifiable Factors
Some risk factors for LOC during stroke are modifiable, such as managing body temperature, glucose levels, and hemoglobin, which may help improve outcomes in patients with hemorrhagic stroke . Other factors, like age, gender, and initial stroke severity, are non-modifiable but important for risk stratification and prognosis 2356.
Conclusion
Loss of consciousness during stroke is a frequent and serious complication that signals more severe brain injury and predicts worse outcomes, including higher mortality and disability. Both ischemic and hemorrhagic strokes share similar risk factors for LOC, and the presence of impaired consciousness should prompt careful management and consideration of modifiable factors to improve recovery. Decisions regarding life-sustaining treatment play a major role in the prognosis of these patients, highlighting the need for thoughtful, individualized care planning.
Sources and full results
Most relevant research papers on this topic