Micro-embolic Signals Detection With Transcranial HOLter in Acute Ischemic STroke (HOLISTER)

Micro-embolic Signals Detection With Transcranial HOLter in Acute Ischemic STroke: Yield in the Etiologic woR-kup

In acute ischemic stroke, the identification of an etiology is of major importance to prevent recurrence by providing the best treatment. Because of numerous possible underlying etiologies, the etiological work-up of ischemic stroke includes a wide range of diagnostic tests, which can be invasive, long and expensive. Moreover, many patients receive a diagnosis of undetermined stroke even after all available diagnosis tests are done, precluding optimal treatment.

Study Overview

• Status: Completed
• Conditions: Stroke
• Intervention / Treatment: Device: Transcranial-holter monitoring

Detailed Description

Asymptomatic MES detected by transcranial doppler have been reported in patient with ischemic stroke. It has been previously demonstrated that MES predict stroke recurrence and that the frequency of MES depends on stroke etiology. However, the pattern of MES has never been correlated to stroke etiology. Transcranial-holter is a novel ambulatory system which allows prolonged recording (up to 4 hours) leading to an increased detection of MES.

Therefore, transcranial holter with an 4 hour-recording will be performed for consecutive eligible patients hospitalized in our stroke care unit. During the recording, the patient will be able to continue their usual activities (eating, walking, speaking and sleeping).

All the included patients will have a classical follow-up at 3, 6 months and 12 months. The neurologist, blinded to the results of transcranial-holter, will have to prescribe and analyze the results of diagnostic tests to identify stroke etiology. Stroke etiology will be established according to the ASCOD classification. Questioning and neurological exam (NIHSS score) will be performed looking for potential recurrent stroke.

• Study Type: Interventional
• Enrollment (Actual): 244
• Phase: Not Applicable

Contacts and Locations

Study Locations

• France
  • Bordeaux, France, 33076
    • CHU de Bordeaux

Participation Criteria

Eligibility Criteria

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

Description

Inclusion Criteria:

• Ischemic stroke in the middle cerebral artery territory
• Acute ischemic stroke within the 7 first days from the onset of the symptoms
• Patient hospitalized in our stroke care unit
• Man or woman older than 18 years
• Patient affiliated to a social security system
• Free Consent, informed writing signed by the participant or the person of confidence and the investigator (no later than the day of inclusion and before any examination required by research)

Exclusion Criteria:

• Transient ischemic stroke
• Ischemic stroke in the vertebro-basilar or anterior cerebral artery territory.
• Proximal middle cerebral artery occlusion leading to the impossibility of recording
• Patient who could not express his consent
• Patient under guardianship or judicial protection
• Pregnant or breastfeeding woman
• Emergency situation
• Life expectancy under 6 months

Exclusion criteria (after inclusion) :

• Absent of bilateral Acoustic window
• Analyzable Recording <30min

Study Plan

How is the study designed?

Design Details

• Primary Purpose: Diagnostic
• Allocation: N/A
• Interventional Model: Single Group Assignment
• Masking: None (Open Label)

Number of Arms

1

Arms and Interventions

Participant Group / Arm	Intervention / Treatment
Experimental: Transcranial-holter monitoring; Transcranial doppler in patient with ischemic stroke	Device: Transcranial-holter monitoring; Transcranial holter with an 4 hour-recording

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Pattern of Microembolic signals (MES) recorded by Transcranial-holter monitoring and interpreted by an observer (index test)	Microembolic signals (MES) will be recorded using Transcranial-holter monitoring (index test) for 4 hours at the acute phase of ischemic stroke. The pattern will be described (frequency, laterality) by the observer interpreting recordings, blinded to stroke etiology as established by the reference standard.	Day 0 (inclusion)
Etiology of ischemic stroke according to ASCOD phenotyping (A: atherosclerosis; S: small-vessel disease; C: cardiac pathology; O: other causes D: dissection) (reference standard)	Etiologic work-up of ischemic stroke will result in ASCOD classification (reference standard) of etiology. Work-up and classification will be established blind to the pattern of microembolic signals recordede by Transcranial-holter monitoring (index test)	Month 12

Secondary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Stroke recurrence	Existence of a stroke recurrence will be assessed by clinical examination and possibly additional tests (imaging,..)	Month 12
Actual duration of Transcranial-holter monitoring recording	Actual duration of Transcranial-holter monitoring recording (minutes) will be measured (expected duration 4 hours) as a feasibility criterion	Day 0 (inclusion)

Collaborators and Investigators

• Sponsor: University Hospital, Bordeaux
• Investigators: Principal Investigator: Pauline Renou, University Hospital, Bordeaux

Study record dates

Study Major Dates

• Study Start (Actual): September 14, 2015
• Primary Completion (Actual): May 11, 2017
• Study Completion (Actual): August 14, 2018

Study Registration Dates

• First Submitted: August 7, 2015
• First Submitted That Met QC Criteria: May 2, 2016
• First Posted (Estimated): May 5, 2016

Study Record Updates

• Last Update Posted (Actual): June 1, 2026
• Last Update Submitted That Met QC Criteria: May 29, 2026
• Last Verified: February 1, 2019

More Information

Terms related to this study

• Keywords: Stroke; Recurrence; Etiology; Transcranial holter; Microembolic signals
• Additional Relevant MeSH Terms: Cerebrovascular Disorders; Brain Diseases; Central Nervous System Diseases; Nervous System Diseases; Vascular Diseases; Cardiovascular Diseases; Pathologic Processes; Disease Attributes; Pathological Conditions, Signs and Symptoms; Stroke; Recurrence
• Other Study ID Numbers: CHUBX 2014/14; 2014-A01951-46 (Other Identifier: ANSM)