Evaluation of the HARM for the Detection of a Cerebral Ischemia in TIA/TNA

Status Completed

Clinical Trial Summary

The research project investigates the incidence of the hyperintense acute reperfusion marker (HARM) in patients with transient ischemic attack (TIA) or transient neurological attack (TNA). Initially, HARM was described after acute ischemic stroke and is caused by a blood-brain barrier disorder after recanalization of an acute vessel occlusion and consecutive reperfusion. These result in a contrast agent extravasation into the subarachnoid space, which can be easily detected on fluid attenuated inversion recovery (FLAIR) images. TIA is defined as a transient focal neurological deficit with a probably cerebrovascular cause. In contrast, TNA is defined as a transient non-focal neurological deficit with multiple causes, including cerebrovascular. The clinical diagnosis of TIA is often flawed and the delineation of TIA and TNA can be difficult. MRI is the most important diagnostic method for the detection or exclusion of cerebral ischemia in patients with TIA/TNA in daily clinical practice. However, on diffusion-weighted imaging (DWI) approximately two-thirds of TIA cases and only one-fifth of TNA cases demonstrate acute cerebral ischemia. Supplementary perfusion-weighted imaging (PWI) scans can only slightly increase this percentage. The well-known HARM could prove to be complementary to DWI and PWI and close or at least reduce the existing gap. In the case of TNA in particular, this could be of clinical relevance in order to avoid mistreatment or even dismissal without further clarification after supposedly inconspicuous imaging. Therefore, the aim of this study is to record the incidence of HARM in a statistically significant number of cases of patients with TIA and TNA and to investigate relationships with symptom duration and anatomical localization. In addition, the dynamics of contrast enhancement in the subarachnoid space in TIA and TNA cases with HARM will be analyzed in detail.

Clinical Trial Description

n/a

Study Design

Related Conditions & MeSH terms

Clinical Trial Details

NCT number	NCT03555643
Study type	Observational
Source	Universitätsmedizin Mannheim
Contact
Status	Completed
Phase
Start date	November 1, 2017
Completion date	October 31, 2021

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Clinical trials are conducted in a series of steps, called phases - each phase is designed to answer a separate research question.

Phase 1: Researchers test a new drug or treatment in a small group of people for the first time to evaluate its safety, determine a safe dosage range, and identify side effects.
Phase 2: The drug or treatment is given to a larger group of people to see if it is effective and to further evaluate its safety.
Phase 3: The drug or treatment is given to large groups of people to confirm its effectiveness, monitor side effects, compare it to commonly used treatments, and collect information that will allow the drug or treatment to be used safely.
Phase 4: Studies are done after the drug or treatment has been marketed to gather information on the drug's effect in various populations and any side effects associated with long-term use.

Evaluation of the HARM for the Detection of a Cerebral Ischemia in TIA/TNA Patients

Clinical Trial Summary

Clinical Trial Description

Study Design

Related Conditions & MeSH terms