F01 — Vascular dementia

What is this category?

F01 is a category for dementia in which the history, course, and (where available) clinical findings point to cerebrovascular disease — most often a stepwise, patchy pattern of decline related to one or more cerebral infarcts — as the cause, distinct from the gradual, uniformly progressive pattern of F00.

Core diagnostic concept

The classification question F01 answers is not "does this person have vascular risk factors?" but "does the pattern and course of cognitive decline itself point to cerebrovascular disease — typically abrupt onset, stepwise deterioration, and unevenly distributed (patchy) cognitive deficits — rather than the smooth, continuous decline of F00?" Vascular risk factors alone, without a matching course, are not sufficient.

Key diagnostic features

Abrupt onset or stepwise deterioration

Decline often follows an identifiable cerebrovascular event, or accumulates in discrete steps rather than the smooth trajectory typical of F00.

Patchy distribution of cognitive deficits

Some cognitive domains may be markedly affected while others remain relatively preserved, unlike F00's more even multi-domain decline (this is sometimes described as 'patchy' cognitive impairment).

Focal neurological signs or symptoms

Evidence of focal brain damage (limb weakness, exaggerated reflexes, gait disturbance) is often, though not always, present and supports a vascular cause.

Relative preservation of insight and personality, early on

Personality and insight can be comparatively well preserved in earlier stages compared with F00, particularly when damage is localised rather than diffuse.

Identifiable vascular risk factors and history

Hypertension, atrial fibrillation, diabetes, prior stroke or transient ischaemic attack, or imaging evidence of cerebrovascular disease support the classification when present alongside a matching course.

How to weigh evidence

These learning labels are teaching aids, not official ICD-10 terminology (see Sources and Method).

• supports Cognitive decline appearing in noticeable steps, each following a separate minor stroke, with preserved abilities in some domains and clear deficits in others.
• consistent not decisive A long history of hypertension. This raises risk but does not by itself establish that the current decline is vascular in origin.
• raises alternative A smooth, gradual decline with no stepwise pattern and no vascular risk factors or events.
• contradicts or weakens Imaging and history show no evidence of cerebrovascular disease, and the course has been uniformly gradual.
• missing and necessary to ask Whether the decline has occurred in discrete steps coinciding with vascular events, or gradually with no such correlation.

Duration and course

Minimum duration: As with other dementias, decline is expected to be evident and sustained, though onset can be more abrupt than F00 if tied to a specific vascular event.

Course: Classically stepwise, with periods of stability or even partial recovery between deteriorations, though a mixed or more gradually progressive vascular picture can also occur, particularly with diffuse small-vessel disease.

Included presentations

• Dementia following one or more identified strokes, with a stepwise history and patchy cognitive profile.
• Dementia attributed to cumulative small-vessel cerebrovascular disease without one dramatic stroke, provided the pattern and risk-factor history support a vascular cause.
• A mixed clinical picture with both vascular and Alzheimer-type features, coded here when the vascular contribution is judged predominant.

Exclusions and distinguishing presentations

Four-character subtypes (orientation)

A learner should not assign a vascular-dementia subtype from a single scan finding alone without checking the actual onset pattern and course. Subtype classification is taught here for orientation only and is not separately assessed in this pilot.

F01.0 — Vascular dementia of acute onset

Developing rapidly after a single major stroke or a succession of strokes. (taught for orientation only, not separately assessed in this pilot)

F01.1 — Multi-infarct dementia

More gradual onset following a number of smaller ischaemic episodes, producing an accumulation of infarcts. (taught for orientation only, not separately assessed in this pilot)

F01.2 — Subcortical vascular dementia

Associated with small-vessel disease affecting subcortical white matter, with relative sparing of the cortex. (taught for orientation only, not separately assessed in this pilot)

Common learner errors

• Common mistake: Treating old age itself as an explanation for cognitive decline

Worked example — using course and history together

A 68-year-old man with long-standing hypertension and atrial fibrillation has had three separate episodes over eighteen months, each time following a brief hospital admission for a minor stroke, after which his family noticed a further, distinct drop in his ability to plan and organise tasks, while his memory for well-rehearsed personal information has remained comparatively intact. Between episodes, his functioning has been stable rather than continuing to decline.

1. Step 1 — Check course: decline has occurred in three discrete steps, each following an identified vascular event, with stability in between — a stepwise pattern rather than a smooth decline.
2. Step 2 — Check distribution of deficits: executive/planning ability is markedly affected while personal memory is relatively preserved, a patchy rather than even profile.
3. Step 3 — Check history: significant vascular risk factors (hypertension, atrial fibrillation) and confirmed stroke events are present and temporally linked to each decline.
4. Step 4 — Check for alternative causes: no other specific disease process is identified, and there is no report of acute fluctuating confusion at the time of assessment (weighing against active delirium).
5. Conclusion — The presentation is best classified as F01, supported by a stepwise course tied to vascular events and a patchy cognitive profile, while the boundary against F00 has been explicitly checked rather than assumed.

Interactive practice

• Type A Decline in steps Recognition / application · Foundation
• Type B A vascular history, but what course? Boundary / differential · Boundary

Retrieval prompts

Try answering each of these from memory before revealing where to check. Nothing you think or type here is sent or saved anywhere.

1. Without looking back at the page, state the one course pattern that most reliably separates F01 from F00.

   Reveal answer location

   Check Duration and course, Diagnostic boundary, or the rapid revision card below — the cue you need is one of those, in this category's own already-authored wording.

   I recalled this I need to review this

2. Name one piece of history that would raise your suspicion of a vascular cause for a dementia presentation.

   Reveal answer location

   Check Duration and course, Diagnostic boundary, or the rapid revision card below — the cue you need is one of those, in this category's own already-authored wording.

   I recalled this I need to review this

These self-checks are a personal study aid only, visible to you on this page for this visit — they are not stored and do not affect your mastery dimensions.

Related glossary terms

• Dementia

  A syndrome, usually of chronic or progressive course, in which there is decline in memory and at least one other cognitive domain (such as language, planning or judgement) severe enough to impair everyday functioning, occurring with clear consciousness. Dementia is a syndrome that can arise from several different underlying diseases, not a single diagnosis.

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• Cognitive domain

  A distinct area of mental functioning that can be separately assessed, such as memory, language, attention, planning/executive function, or visuospatial ability. Classifying organic mental disorders often depends on which domain(s) are affected and whether the pattern is isolated or multi-domain.

  Open full glossary entry →