Leukoaraiosis Impact on Acute Ischemic Stroke Outcomes

Leukoaraiosis denotes diffuse white matter changes detectable on neuroimaging that reflect chronic small vessel disease. In the setting of acute ischaemic stroke, pre-existing leukoaraiosis is increasingly recognised as a modifier of infarct evolution, reperfusion efficacy and clinical recovery. Patients with a higher burden of white matter lesions tend to exhibit faster infarct growth, reduced neurological improvement after recanalisation therapies and a greater likelihood of poor functional outcome at three months. Moreover, leukoaraiosis has been linked to an elevated risk of futile reperfusion, in which technical success in restoring blood flow is not matched by clinical benefit, and to a modest increase in post-treatment haemorrhagic complications. The global significance of these findings lies in the potential for baseline white matter status to inform patient selection for intravenous thrombolysis and mechanical thrombectomy, to refine prognostic models and to guide blood pressure management strategies in the acute and subacute phases of stroke care.

Research from Nature Portfolio

Recent studies have interrogated the combined influence of pre-existing leukoaraiosis and blood pressure dynamics on outcomes after mechanical thrombectomy. In a multicentre cohort of over 500 patients with anterior circulation large vessel occlusion, moderate-to-severe leukoaraiosis was independently associated with a threefold increase in poor 90-day functional outcome and mortality. Elevated maximum systolic pressure during the first 24 hours further compounded adverse prognosis, while neither leukoaraiosis nor blood pressure variability exerted a significant effect on rates of symptomatic intracerebral haemorrhage. These findings highlight the need for tailored haemodynamic targets in patients with a high burden of white matter disease undergoing endovascular therapy.

Leukoaraiosis Impact on Acute Ischemic Stroke Outcomes publication trend

The graph below shows the total number of articles in leukoaraiosis impact on acute ischemic stroke outcomes across all publications each year (not limited to Nature Index journals).

Technical terms

Leukoaraiosis: Diffuse white matter changes on CT or MRI reflecting small vessel disease.

White matter hyperintensity (WMH): Areas of increased signal on T2-weighted MRI indicative of white matter damage.

Endovascular thrombectomy: Mechanical removal of an intravascular clot via catheter navigation in acute stroke.

Collateral circulation: Alternative vascular pathways that maintain cerebral perfusion when primary arteries are occluded.

Modified Rankin Scale (mRS): Ordinal scale assessing functional independence and disability after stroke, ranging from 0 (no symptoms) to 6 (death).

References

1. Effect of Cerebral Small Vessel Disease Burden on Infarct Growth Rate and Stroke Outcomes in Large Vessel Occlusion Stroke Receiving Endovascular Treatment. Biomedicines (2023).
2. White Matter Lesions and Outcomes After Endovascular Treatment for Acute Ischemic Stroke: MR CLEAN Registry Results. Stroke (2021).
3. Impact of leukoaraiosis or blood pressure on clinical outcome, mortality and symptomatic intracerebral hemorrhage after mechanical thrombectomy in acute ischemic stroke. Scientific Reports (2022).
4. White matter hyperintensity burden and collateral circulation in acute ischemic stroke with large artery occlusion. BMC Neurology (2024).
5. Elucidating the Role of Baseline Leukoaraiosis on Forecasting Clinical Outcome of Acute Ischemic Stroke Patients Undergoing Reperfusion Therapy. Neurology International (2022).