Related Experiment Video
Updated: Jun 24, 2026

Minimally Invasive Endoscopic Intracerebral Hemorrhage Evacuation
Published on: October 15, 2021
Cognitive impairment before and after intracerebral haemorrhage: a systematic review
Claire Donnellan1, David Werring2
1School of Nursing and Midwifery, Faculty of Health Sciences, University of Dublin Trinity College, 2 Clare Street, Dublin 2, Ireland. cdonnel@tcd.ie.
Insights
Cognitive impairment is common before and after intracerebral hemorrhage (ICH), affecting nearly one-third of patients. Factors like prior stroke and hemorrhage volume predict cognitive decline post-ICH.
Area of Science:
- Neurology
- Neuroscience
- Cognitive Science
Background:
- Intracerebral hemorrhage (ICH) is increasingly linked to cognitive dysfunction, with dementia prevalence ranging from 5-44%.
- Existing research on cerebrovascular disease and cognition has predominantly focused on ischemic stroke.
- This review addresses the gap by focusing on cognitive dysfunction specifically related to ICH.
Purpose of the Study:
- To systematically identify and quantify studies examining cognitive function before and after intracerebral hemorrhage.
- To synthesize findings on the prevalence and predictors of cognitive impairment in ICH patients.
- To identify commonly affected cognitive domains and assessment tools in ICH.
Main Methods:
- A systematic literature search was conducted across PubMed, Science Direct, Scopus, and PsycINFO.
- Studies were included if they assessed global cognition or used a neuropsychological battery.
- Nineteen studies were included: 8 focusing on pre-ICH cognition and 11 on post-ICH cognition.
Main Results:
- Cognitive impairment prevalence ranged from 9-29% pre-ICH and 14-88% post-ICH.
- Predictive factors included prior stroke, ICH volume/location, and cerebral amyloid angiopathy markers.
- Commonly affected domains post-ICH were processing speed, executive function, memory, language, and visuospatial abilities.
Conclusions:
- Cognitive impairment and dementia affect approximately one-third of patients following intracerebral hemorrhage.
- Early identification and management of cognitive dysfunction are crucial in ICH care.
- Further research is needed to fully elucidate the long-term cognitive sequelae of ICH.
Introduction:
There is increasing interest in understanding cognitive dysfunction before and after Intracerebral haemorrhage (ICH), given the higher prevalence of dementia reported (ranging from 5 to 44%) for this stroke type. Much of the evidence to date examining cognitive impairment associated with cerebrovascular disease has tended to focus more on ischaemic stroke. The aim of this review was to identify and quantify studies that focused on cognitive dysfunction pre and post ICH.
Methods:
We conducted a systematic search using databases PubMed, Science Direct, Scopus and PsycINFO to identify studies that exclusively assessed cognitive function pre and post ICH. Studies were included in the review if used a measure of global cognition and/or a neuropsychological battery to assess cognitive function. Nineteen studies were deemed relevant for inclusion, where n = 8 studies examined cognitive impairment pre ICH and n = 11 post ICH.
Results:
Prevalence of cognitive impairment ranged between 9-29% for pre ICH and 14-88% for post ICH. Predictive factors identified for pre and post ICH were previous stroke, ICH volume and location and markers of cerebral amyloid angiopathy (CAA). Most common cognitive domains affected post ICH were information processing speed, executive function, memory, language and visuo-spatial abilities. Most common cognitive assessments tools were the Informant Questionnaire for Cognitive Decline in the Elderly (IQCODE) for pre-existing cognitive impairment and the Mini-Mental State Examination for global cognition post ICH and the Trail Making Test where neuropsychological tests were used.
Conclusion:
Cognitive impairment and dementia affected almost one-third of patients, whether assessed pre or post ICH.
Related Concept Videos
Hemorrhagic Stroke l: Introduction
Hemorrhagic Stroke ll: Pathophysiology
Traumatic Brain Injury l: Introduction
Dementia l: Introduction

