Our brain requires oxygen and nutrients, which are transported by blood vessels, for proper functioning. Damage, blockage or bleeding of these blood vessels will prevent the brain from working properly. Over time, this causes difficulties with memory, thinking, behaviour, and everyday activities. Vascular dementia is a condition in which parts of the brain are damaged due to a lack of enough blood flow. Vascular dementia follows Alzheimer’s disease as the most common type of dementia.
Vascular dementia can be due to many conditions that damage the blood vessels or block the flow of blood to the brain. Some causes and risk factors are as follows:
Ischaemic/haemorrhagic stroke: In ischaemic stroke, the blood vessel is blocked, and in haemorrhagic stroke, the blood vessel bursts, which kills or damages brain tissue. People who have suffered multiple strokes or have had silent strokes can develop vascular dementia.
Small vessel disease: This occurs when the small blood vessels in the brain become damaged, affecting the white matter (responsible for communication between different brain regions). This causes impaired signalling, reducing the thinking ability.
Atherosclerosis: The development of plaques (fatty deposits) in the arteries that supply blood to the brain reduces blood flow.
High blood pressure: Chronic high blood pressure can damage the walls of the brain’s blood vessels, leading to blockage or small vessel disease.
Diabetes: People with high blood sugar are at risk of blood vessel damage in the brain.
High cholesterol: This contributes to plaque buildup.
Atrial fibrillation (irregular heartbeat): This can increase the risk of blood clot formation, which can travel to the brain and cause a stroke.
Smoking/unhealthy lifestyle: The risk of vascular disease increases considerably in people who smoke or follow an unhealthy diet, are obese or do not practice regular exercise.
Age: Increasing age is a risk factor for vascular dementia.
Genetic factors: People with genetic disorders, such as CADASIL (Cerebral Autosomal Dominant Arteriopathy with Subcortical Infarcts and Leukoencephalopathy), have blood vessel wall thickening, increasing the risk of stroke and vascular dementia.
The symptoms of vascular dementia depend on the part of the brain that is damaged, the extent of damage, and the speed at which it happens. In some cases, the onset is sudden, such as after a stroke, whereas in other cases, the onset is gradual.
Some common symptoms include the following:
Thinking and reasoning: Patients experience slower thinking, struggle with problem-solving, planning, and task organisation and make errors in daily decision-making.
Memory and attention: Difficulty in concentration and remembering recent events, unable to follow conversations or instructions and trouble with remembering appointments or names.
Language: Difficulty finding the right word and unable to understand others.
Movement/balance, and coordination: Patients cannot walk steadily, experience frequent falls, and have difficulty with coordination. Some patients may experience limb weakness after a stroke.
Alterations in mood and behaviour: Loss of interest, irritability, emotional and behavioural changes and depression.
Other changes: This can include sleep disturbances, bowel/bladder control problems or hallucinations in some cases.
Because brain damage can occur in a step-wise manner (e.g., after a stroke), a pattern of sudden worsening may be observed, followed by periods of stability. Some improvement can be seen in people if the damage is reversible or if treatment is initiated early.
No universally accepted staging system for vascular dementia is available, because its course can differ considerably from person to person. However, the course of vascular dementia is divided into early, middle, and late stages, indicating a “stepwise” decline, which can help patients and caregivers understand what to expect.
Early stage: Slowed thinking, minor memory lapses, such as forgetting names, trouble performing multi-step tasks, reduced attention span, mood fluctuations and minor problems in balance or walking. At this stage, the patient can independently cook, eat and dress, although requiring some effort. They may require frequent reminders.
Middle stage: The symptoms seen in the early stage tend to get worse, and the gait becomes unsteady with an increased risk of falls. The daily tasks become more difficult to perform and may require some assistance. Also, safety becomes a concern.
Late stage: The cognitive abilities are severely affected. The memory loss is significant for both recent and past events. Patients may be unable to walk, become bedridden, unable to speak clearly, lose bladder/bowel control and require full-time assistance. Significant changes in behaviour, such as becoming aggressive, are noted. At this stage, the focus is on patient comfort, requiring professional assistance with feeding, personal hygiene and dressing.
If you or a family member is experiencing some of the symptoms listed above, a correct diagnosis involves the following:
Medical history & risk factors: History of past strokes, diabetes, high blood pressure, family history, lifestyle and current medications.
Physical and neurological examination: The neurologist will check for signs of weakness, balance and speech problems.
Cognitive tests/neuropsychological testing: The neurologist may check the patient’s attention span, memory, language and reasoning abilities.
Brain imaging: Magnetic resonance imaging can show changes in white matter and small infarcts; thus, it is a preferred choice of imaging.
Other tests: Certain blood tests can be performed to rule out thyroid disorders, vitamin deficiencies and infections. Specific tests may be performed if Alzheimer’s disease is suspected to occur simultaneously.
An accurate diagnosis helps in risk factor management and treatment planning.
While vascular dementia is irreversible and incurable, the progression can be slowed down, symptoms can be reduced, and quality of life can be maintained. The earlier the diagnosis, the more helpful the interventions tend to be.
Risk factor management: Monitor and control high blood pressure, diabetes and high cholesterol levels. Maintain a healthy weight, quit smoking, eat a balanced diet and exercise regularly.
Medications: Currently, there are no medications that are specifically approved for vascular dementia. Doctors may prescribe medications to control blood pressure, sugar levels, cholesterol levels and anticoagulants to reduce the risk of blood clot formation. In patients with a mix of vascular dementia and Alzheimer’s disease, medications approved for Alzheimer’s may be given. Antipsychotic medications can be given to those who display aggression.
Rehabilitation and therapy: Physical therapists, occupational therapists and speech therapists may be involved to improve movement and balance, to adapt to activities of daily living and improve swallowing and speech difficulties.
Supportive care: A structured routine, keeping mentally active, maintaining social connections, treating depression, ensuring the safety of the patient at home, improving sleep hygiene, following a healthy diet with daily exercise and controlling alcohol consumption and the help of a caregiver, are important. In addition, it is crucial to ascertain future care preferences and legal and financial planning when the patient can make those decisions. Palliative care should also be discussed when vascular dementia is in its advanced stages.
The course of vascular dementia is highly variable, as some patients show rapid decline and others show slow progression. Life expectancy in patients with vascular dementia is shown to be reduced compared to those without dementia, primarily owing to the associated vascular disease (e.g., heart disease, further strokes). However, patients can lead long and healthy lives with early diagnosis, good medical care, and lifestyle modifications.
Vascular dementia is caused by damage to blood vessels or a reduction in blood flow to the brain. Diabetes, high blood pressure, high cholesterol levels, smoking, and heart disease are risk factors for vascular dementia. Symptoms appear either gradually or suddenly, and patients experience difficulty with multi-task planning, slow movements, mood changes, and thinking clearly.
There is no cure for vascular dementia, but early diagnosis and intervention, a healthy lifestyle, and a robust support system can slow disease progression, reduce the symptoms, and enhance the patient’s quality of life. Every patient’s experience with vascular dementia differs: in some, the disease progression is slow, whereas in others, it can be rapid. A clear understanding of the expectations can not only help patients but also the people caring for the patient to manage the condition better.
If you or a loved one are experiencing symptoms of vascular dementia, seek expert guidance and compassionate care at Kauvery Hospital. With branches in Chennai, Hosur, Salem, Tirunelveli, and Trichy, our experienced team offers comprehensive diagnosis, treatment, and support for dementia and neurological conditions.
Vascular dementia occurs when blood flow to the brain is reduced or blocked, causing brain cells to die. This affects memory, reasoning, movement, and daily functioning. It often develops after strokes or small vessel disease and is the second most common form of dementia after Alzheimer’s.
Common causes include stroke, high blood pressure, diabetes, high cholesterol, atherosclerosis, and atrial fibrillation. Smoking, obesity, lack of exercise, and ageing also raise the risk by damaging brain blood vessels and reducing oxygen flow to the brain.
Early symptoms may include confusion, slower thinking, trouble concentrating, forgetfulness, mood changes, and unsteady walking. These signs can develop suddenly after a stroke or progress gradually due to small vessel disease.
Diagnosis involves neurological exams, medical history review, cognitive testing, and brain imaging such as MRI scans. These help identify blood vessel damage, small strokes, or white matter changes affecting brain function.
Although vascular dementia cannot be cured, treatment can slow its progression. Managing high blood pressure, diabetes, and cholesterol, combined with rehabilitation therapy, medications, and healthy lifestyle changes, can improve symptoms and quality of life.
It typically progresses through early, middle, and late stages. Early stages involve minor memory loss and slower thinking; middle stages affect balance and independence; late stages lead to severe memory loss, mobility problems, and full-time care needs.
Maintaining healthy blood pressure, controlling diabetes, quitting smoking, eating a balanced diet, exercising regularly, and reducing alcohol intake protect brain health and lower the risk of vascular damage.
Kauvery Hospital is globally known for its multidisciplinary services at all its Centers of Excellence, and for its comprehensive, Avant-Grade technology, especially in diagnostics and remedial care in heart diseases, transplantation, vascular and neurosciences medicine. Located in the heart of Trichy (Tennur, Royal Road and Alexandria Road (Cantonment), Chennai (Alwarpet, Radial Road & Vadapalani), Hosur, Salem, Tirunelveli and Bengaluru, the hospital also renders adult and paediatric trauma care.
Chennai Alwarpet – 044 4000 6000 • Chennai Radial Road – 044 6111 6111 • Chennai Vadapalani – 044 4000 6000 • Trichy – Cantonment – 0431 4077777 • Trichy – Heartcity – 0431 4077777 • Trichy – Tennur – 0431 4022555 • Maa Kauvery Trichy – 0431 4077777 • Kauvery Cancer Institute, Trichy – 0431 4077777 • Hosur – 04344 272727 • Salem – 0427 2677777 • Tirunelveli – 0462 4006000 • Bengaluru – 080 6801 68011
