Vascular dementia

Disease Description (Causes and Symptoms)

• Definition summary: Vascular dementia is a condition in which cognitive function declines due to cerebrovascular disease (such as stroke, multiple infarctions, or small-vessel disease). It is diagnosed when an association between vascular lesions and cognitive impairment is confirmed on brain imaging.
• Causes/pathophysiology:
  • It occurs when brain cells are partially lost or their function declines due to ischemic or hemorrhagic brain injury.
  • Clinically, various mechanisms exist, including multiple infarctions (multiple cerebral infarctions), strategic infarctions in critical areas (such as the frontal or temporal lobes), and subcortical (small-vessel) lesions (Binswanger type).
  • In cases of small-vessel disease, cognitive decline may progress gradually without clear acute neurological symptoms.
• Main symptoms:
  • Cognitive impairment (particularly impaired executive function, planning, and attention) — memory impairment may not be relatively prominent
  • Language impairment (aphasia), decreased judgment
  • Gait disturbance, ataxia, paralysis or sensory abnormalities in one limb or one side of the body (hemiplegia, sensory loss)
  • Symptoms may worsen in a stepwise pattern (when caused by recurrent strokes) or progress gradually (in small-vessel disease)
• Diagnostic clues: Findings of dementia on neurocognitive testing + evidence of ischemic or hemorrhagic lesions on imaging such as brain CT or MRI. Blood tests are also performed to rule out metabolic, endocrine, and infectious causes.

Treatment Methods and Precautions

• Treatment goals: Prevent additional brain injury (recurrent stroke), suppress worsening of symptoms, restore function, and preserve activities of daily living
• Medication treatment (general principles)
  • Secondary prevention of stroke: A decision is made to use antiplatelet drugs (such as aspirin or clopidogrel) or anticoagulants (warfarin or DOACs) in cases with a history of atrial fibrillation or other relevant conditions
  • Treatment of hyperlipidemia: Statins (to prevent cardiovascular and cerebrovascular events)
  • Strict management of blood pressure and blood glucose (individual targets should be discussed with the treating physician)
  • Medication for cognitive symptoms: Cholinesterase inhibitors (such as donepezil) or memantine may be considered in some patients, but their effects are limited and the decision should be made by the treating physician
• Non-medication treatment
  • Rehabilitation: Physical therapy (improving gait and balance), occupational therapy (maintaining daily functions), and speech therapy
  • Lifestyle improvements: Smoking cessation and limiting alcohol, regular exercise, and management of cardiovascular risk factors (weight and diet)
  • Nutritional management, fall prevention, and organizing daytime and nighttime activity patterns
• Procedures/surgery: If a vascular problem can be corrected (e.g., severe carotid artery stenosis), endovascular treatment (stenting or endarterectomy) may be considered, but the indications require individual assessment
• Precautions and risk of complications
  • The risk of bleeding must be assessed when using anticoagulants or antiplatelet drugs
  • Anticholinergic drugs and excessive sedatives or benzodiazepines may worsen cognitive function → minimize their use
  • Excessively lowering blood pressure may worsen symptoms by reducing cerebral perfusion → discuss the target blood pressure with the treating physician
  • As the condition progresses, the risk of secondary complications such as falls, pneumonia, pressure sores, and urinary tract infections increases

Checklist Before an Outpatient Visit (Items to Bring and Sample Questions)

• Items to bring (recommended)
  • A list of all medications currently being taken (including prescription drugs, over-the-counter drugs, supplements, and herbal medicines)
  • Past medical history (especially stroke, atrial fibrillation, and heart disease) and surgical records
  • Previous brain imaging (CT/MRI) and test results (films or reports, if possible)
  • Recent records of blood pressure, blood glucose, and weight, plus notes on changes in symptoms (onset and pattern of progression)
  • A caregiver or someone who usually lives with the patient (to help describe symptoms)
• Examples of questions to be prepared to answer when visiting the doctor
  • When did the symptoms begin? Did they start suddenly or progress gradually?
  • Have there been any recent falls or episodes of decreased consciousness?
  • Have there been changes in urination or bowel movements, sleep, or behavior?
  • Have there been any problems such as side effects or bleeding while taking medication?

Examples of General Questions to Ask the Doctor

• What is the cause of this disease, and how should my current condition (test results) be interpreted?
• What blood pressure, blood glucose, and cholesterol targets do you recommend?
• What are the major side effects and precautions of the medication I am about to start (or currently taking)?
• Would rehabilitation (physical therapy/speech therapy) be helpful? How many sessions per week are needed?
• Are there any specific activities or medications I should avoid in daily life?
• How can the prognosis be predicted, and what regular checkups should I undergo to prevent worsening?

Examples of Disease-Specific Questions

• Do the lesions observed on my current MRI (or CT) appear to be the main cause of the cognitive impairment? What additional imaging or tests (vascular imaging, cardiac tests, etc.) are needed?
• To reduce my future risk of recurrent stroke, which is more appropriate for me—an antiplatelet drug or an anticoagulant? How will the risk of bleeding be assessed?

(Note: This information is guidance based on general medical knowledge. Specific diagnosis and treatment should be determined in consultation with the treating medical professionals.)