ReviewAJNR. American journal of neuroradiology2025
Role of Hypoperfusion Intensity Ratio in Vessel Occlusions: A Review on Safety and Clinical Outcomes.
Review in AJNR. American journal of neuroradiology, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 16 papers.
What it found
Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.
The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.
Who cites it
16 citing papers in PubMed.
- Tmax 10 Volume Is Independently Associated with NWU Delta in Large Core Stroke.Clinical neuroradiology · 2026Observational
- Hypoperfusion Intensity Ratio as an Independent Predictor of Functional Outcome After Mechanical Thrombectomy for Large Vessel Occlusion Stroke.Medicina (Kaunas, Lithuania) · 2026Article
- Comprehensive Assessment of Arterial, Tissue, and Venous Collaterals for Evaluating the Infarct Growth Rate: The Multimodal Collateral Score.Annals of clinical and translational neurology · 2026Article
- Cytoprotection Concepts for Ischemic Stroke in the Recanalization Era.Advanced science (Weinheim, Baden-Wurttemberg, Germany) · 2026Review
- Clinical outcomes of patients with unsuccessful mechanical thrombectomy versus best medical management of medium vessel occlusion stroke in the middle cerebral artery territory.Journal of neurointerventional surgery · 2025Article
- Unfavorable Perfusion Collateral Impairment Score Is Associated with Higher Odds of Poor Outcomes in Large Vessel Occlusion Stroke.Stroke (Hoboken, N.J.) · 2025Article
- Prolonged venous transit and clinical outcomes in anterior circulation large-vessel occlusion stroke with complete or near-complete reperfusion.Neuroradiology · 2025Article
- Hypoperfusion intensity ratio is associated with follow-up infarct volume in medium vessel occlusions: A multicenter multinational study.Neurotherapeutics : the journal of the American Society for Experimental NeuroTherapeutics · 2025Article
- Interobserver and Intraobserver Variability in the Assessment of Prolonged Venous Transit in Anterior Circulation Large-Vessel Occlusion Ischemic Stroke.AJNR. American journal of neuroradiology · 2025Article
- The Cortical Vein Opacification Score Is Independently Associated with Good and Excellent Functional Outcomes at 90 Days in Patients with Minor Stroke with Anterior Circulation Large-Vessel Occlusion: A Multicenter Study.AJNR. American journal of neuroradiology · 2025Article
- Efficacy and safety of mechanical thrombectomy in distal medium middle cerebral artery occlusion ischemic stroke patients on low-dose aspirin.International journal of stroke : official journal of the International Stroke Society · 2025Article
- Efficacy of intravenous thrombolysis in patients with mild acute ischemic stroke and large vessel occlusion with different hypoperfusion volumes.Neurological sciences : official journal of the Italian Neurological Society and of the Italian Society of Clinical Neurophysiology · 2025Article
- Perfusion imaging parameters predict long-term clinical outcome in isolated posterior cerebral artery occlusion stroke patients.Interventional neuroradiology : journal of peritherapeutic neuroradiology, surgical procedures and related neurosciences · 2025Article
- Advances in Collateral Neuroimaging for Acute Ischemic Stroke: Redefining Time and Tissue Windows in the Reperfusion Era.Journal of neuroimaging : official journal of the American Society of NeuroimagingReview
- Prolonged Venous Transit Is Associated With Unfavorable Outcomes in Anterior Circulation Distal Medium Vessel Stroke.Journal of neuroimaging : official journal of the American Society of NeuroimagingArticle
- Infarct growth rate predicts functional outcome after successful mechanical thrombectomy in patients with acute ischemic stroke.Frontiers in neurologyArticle
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
25 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
The hypoperfusion intensity ratio (HIR) is a quantitative metric used in vascular occlusion imaging to evaluate the extent of brain tissue at risk due to hypoperfusion. Defined as the ratio of tissue volume with a time-to-maximum (Tmax) of >10 seconds to that of >6 seconds, HIR assists in differentiating between the salvageable penumbra and the irreversibly injured core infarct. This review explores the role of HIR in assessing clinical outcomes and guiding treatment strategies, including mechanical thrombectomy and thrombolytic therapy, for patients with large-vessel occlusions (LVOs). Evidence suggests that higher HIR values are associated with worse clinical outcomes, indicating more severe tissue damage and reduced potential for salvage through reperfusion. Additionally, HIR demonstrates predictive accuracy regarding infarct growth, collateral flow, and the risk of reperfusion hemorrhage. It has shown superiority over traditional metrics, such as core infarct volume, in predicting functional outcomes. HIR offers valuable insights for risk stratification and treatment planning in patients with LVOs and distal medium vessel occlusions. Incorporating HIR into clinical practice enhances patient care by improving decision-making processes, promoting timely interventions, and optimizing postintervention management to minimize complications and improve recovery outcomes.
Indexed as
Identifiers
What OpenQuestion holds
Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.