Choice of Initial Brain Imaging in Patients with Suspected Acute Stroke: STROKE69, a Population-Based Study

Cerebral white matter vasculature: still uncharted?

White matter vasculature plays a major role in the pathophysiology of permanent neurological deficits following a stroke or progressive cognitive alteration related to small vessel disease. Thus, knowledge of the complex vascularization and functional aspects of the deep white matter territories is paramount to comprehend clinical manifestations of brain ischemia. This review provides a structured presentation of the existing knowledge of the vascularization of the human cerebral white matter from seminal historical studies to the current literature. First, we revisit the highlights of prenatal development of the endoparenchymal telencephalic vascular system that are crucial for the understanding of vessel organization in the adult. Second, we reveal the tangled history of debates on the existence, clinical significance, and physiological role of leptomeningeal anastomoses. Then, we present how conceptions on white matter vascularization transitioned from the mixed ventriculopetal/ventriculofugal theory, in which a low-flow area was interposed in between concurrent arterial flows, to the purely ventriculopetal theory. The latter model explains variable white matter sensitivity to ischemia by various organizations of ventriculopetal vessel terminals having different origin/length properties and interconnection patterns. Next, arteries supplying primarily the white matter are described according to their length and overall structure. Furthermore, the known distribution territories, to date, are studied in relation to primary anatomical structures of the human cerebral white matter, emphasizing the sparsity of the "ground-truth" data available in the literature. Finally, the implications for both large vessel occlusion and chronic small vessel disease are discussed, as well as the insights from neuroimaging. All things considered, we identify the need for further research on deep white matter vascularization, especially regarding the arterial supply of white matter fiber tracts.

A Qualitative Study of Barriers and Facilitators to Adherence to Secondary Prevention Medications Among French Patients Suffering from Stroke and Transient Ischemic Attack

PURPOSE

Secondary prevention medications (SPM) reduce the risk of ischemic stroke (IS) and transient ischemic attack (TIA) recurrence. However, approximately one-third of patients are estimated to be non-adherent. This qualitative study aimed to explore barriers and facilitators to adherence to SPM after IS or TIA.

PATIENTS AND METHODS

Thirty-six face-to-face semi-structured interviews were conducted with 14 TIA patients and 22 IS patients who self-administered their treatment 12 months after IS/TIA. A thematic analysis was performed.

RESULTS

Major facilitators to good adherence to SPM were the fear of stroke recurrence and the high level of trust in the prescribing physician. Barriers included a perceived lack and/or inappropriate timing of information about SPM, practical difficulties of taking some SPM (eg, inadequate packaging) and of implementing routines into their daily life.

CONCLUSION

Information on SPM is inadequate in terms of quantity and timing both during the acute IS/TIA period and over the long term. Providing more tailor-made information at an opportune moment, in particular by promoting discussion with their general practitioner (GP) throughout the course of illness and recovery, is essential to ensure that patients are not left alone in the decision-making process regarding adherence to SPM.