Neurosonographic findings in dementia

Area of Science:

• Neuroscience
• Neurology
• Vascular Medicine

Background:

• Vascular dementia (VD) and dementia of the Alzheimer type (DAT) are distinct neurodegenerative conditions.
• Cerebrovascular changes are implicated in the pathophysiology of VD.
• Neurosonography offers a non-invasive method to assess cerebral hemodynamics.

Purpose of the Study:

• To compare neurosonographic findings in patients with VD, DAT, and healthy controls.
• To investigate the prevalence of significant carotid stenosis in VD.
• To evaluate cerebral blood flow velocities in the middle cerebral artery (MCA) and basilar artery (BA) across the groups.

Main Methods:

• Neurosonographic examinations were conducted on 19 VD patients, 21 DAT patients, and 20 controls.
• Patient groups were matched for age and sex.
• Dementia severity was assessed using the Mini-Mental State Examination and Mattis Dementia Rating Scale.

Main Results:

• Carotid stenosis (>50%) or occlusion was significantly more frequent in VD patients compared to controls.
• Mean flow velocities in the left MCA and BA were decreased in both VD and DAT groups relative to controls.
• No significant differences in MCA or BA flow velocities were observed between VD and DAT patients.

Conclusions:

• Increased prevalence of significant carotid stenosis is associated with vascular dementia.
• Reduced cerebral blood flow velocities in MCA and BA are observed in both VD and DAT compared to controls.
• Neurosonography may help differentiate underlying pathologies in dementia, though flow velocities do not distinguish between VD and DAT.