Brain Hemorrhage and Functional Outcome in Stroke Patients With CAA Features on Pre-thrombolysis MRI Treated With Intravenous Thrombolysis (Thrombolysis in CAA) ( Thromb in CAA ) (Thromb in CAA)

Brain Hemorrhage on 24h-CT and Functional Outcome in Stroke Patients With Cerebral Amyloid Angiopathy Features on Pre-thrombolysis MRI Treated With Intravenous Thrombolysis

Background: In stroke patients treated with intravenous thrombolysis (IVT), presence and high number of strictly lobar cerebral microbleeds (compatible with cerebral amyloid angiopathy, CAA) seems to be associated with increased risk of hemorrhagic transformation, symptomatic hemorrhagic transformation, remote hemorrhage, and poor functional outcome. Some of these reported CAA patients with cerebral microbleeds also had chronic lobar intracerebral haemorrhage. Few data is available on IVT-treated CAA patients showing cortical superficial siderosis. There are no reports studying factors associated with brain hemorrhagic complication or functional outcome inside a group of IVT-treated CAA patients. Our aim was to evaluate brain hemorrhagic complications on 24h-CT and functional outcome after IVT in stroke patients with CAA features on pre-IVT MRI.

Methods: In our stroke center, IVT decision in patients with CAA MRI features is left at the discretion of the treating physician. We retrospectively screened pre-IVT imaging of 959 consecutive IVT-treated stroke patients (between January 2015 and July 2022) without ongoing anticoagulation therapy for probable CAA MRI features defined by modified Boston criteria. After exclusion of 119 patients with lacking MRI (n=47), with MRI showing motion artefacts (n=49) or with alternative chronic brain hemorrhage cause on MRI (n=23), 15 IVT-treated patients with probable CAA on pre-IVT MRI were identified. In these 15 patients, clinical, biological and MRI characteristics were compared between patients with vs. without post-IVT hemorrhage and between patients with poor (MRS 3-6) vs. good (MRS 0-2) functional outcome at discharge.

Study Overview

• Status: Completed
• Conditions: Stroke; Hemorrhage; Cerebral Amyloid Angiopathy
• Intervention / Treatment: Other: None, pure observational study

• Study Type: Observational
• Enrollment (Actual): 15

Contacts and Locations

Study Locations

• France
  • Nîmes, France, 30029
    • CHU de Nîmes

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: 18 years and older (Adult, Older Adult)
• Accepts Healthy Volunteers: No

• Sampling Method: Probability Sample

Study Population

consecutive IVT-treated stroke patientswith CAA features (strictly lobar CMB, CSS, or chronic lobar ICH) on pre-treatment MRI therapy registered in our stroke database between January 2015 and July 2022

Description

Inclusion Criteria:

• Consecutive IVT-treated stroke patients without ongoing anticoagulation therapy registered in our stroke database presenting probable CAA on pre-IVT MRI
• Patient taken in charge at the CHU of Nîmes between January 2015 and July 2022

Exclusion Criteria:

• patients with ongoing anticoagulation therapy

Study Plan

How is the study designed?

Design Details

• Observational Models: Cohort
• Time Perspectives: Retrospective

Number of groups / cohorts

1

Cohorts and Interventions

Group / Cohort	Intervention / Treatment
cerebral amyloid angiopathy (CAA); Patients with CAA treated with intravenous thrombolysis	Other: None, pure observational study; None, pure observational study

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
brain hemorrhage	brain hemorrhage on non-enhanced CT at 24 hours after IVT (Yes/No)	24 hours after intravenous thrombolysis (IVT)
functional outcome	functional outcome at hospital discharge according to the modified Rankin scale (Poor/Good)	Up to 3 months. From date of symptom onset until date of hospital discharge, assessed up to 3 months.

Collaborators and Investigators

• Sponsor: Centre Hospitalier Universitaire de Nīmes
• Investigators: Study Director: Anissa MEGZARI, Centre Hospitalier Universitaire de Nîmes

Publications and helpful links

General Publications

• Leonte A, Laurent-Chabalier S, Wacongne A, Parvu T, Hackius M, Thouvenot E, Renard D. Brain hemorrhage on 24h-CT and functional outcome in stroke patients with cerebral amyloid angiopathy features on pre-thrombolysis MRI treated with intravenous thrombolysis: A case series. J Stroke Cerebrovasc Dis. 2023 Feb;32(2):106907. doi: 10.1016/j.jstrokecerebrovasdis.2022.106907. Epub 2022 Nov 25.

Study record dates

Study Major Dates

• Study Start (Actual): October 2, 2022
• Primary Completion (Actual): December 31, 2022
• Study Completion (Actual): December 31, 2022

Study Registration Dates

• First Submitted: September 23, 2022
• First Submitted That Met QC Criteria: October 3, 2022
• First Posted (Actual): October 4, 2022

Study Record Updates

• Last Update Posted (Actual): December 10, 2025
• Last Update Submitted That Met QC Criteria: December 3, 2025
• Last Verified: December 1, 2025

More Information

Terms related to this study

• Keywords: functional outcome
• Additional Relevant MeSH Terms: Cerebrovascular Disorders; Brain Diseases; Central Nervous System Diseases; Nervous System Diseases; Vascular Diseases; Cardiovascular Diseases; Pathologic Processes; Metabolic Diseases; Proteostasis Deficiencies; Intracranial Arterial Diseases; Cerebral Arterial Diseases; Amyloidosis; Pathological Conditions, Signs and Symptoms; Nutritional and Metabolic Diseases; Stroke; Hemorrhage; Cerebral Amyloid Angiopathy
• Other Study ID Numbers: LOCAL/2022/DR-03

Drug and device information, study documents

• Studies a U.S. FDA-regulated drug product: No
• Studies a U.S. FDA-regulated device product: No
• product manufactured in and exported from the U.S.: No