What is the relation between low blood pressure and dementia?

Asked 28-Sep-2022
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What is the relation between low blood pressure and dementia?


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A mental decline that is severe enough to interfere with daily life is referred to as dementia. The common symptom of dementia is memory loss.Low blood pressure, or hypotension, is when blood pressure is too low. This can cause lightheadedness, fainting, and dizziness. There is no known cause of low blood pressure. However, it is often seen in older adults, and it is more common in those with dementia. 

What is the relation between low blood pressure and dementia?

Recent research has suggested that low blood pressure may also be a risk factor for dementia, although the evidence is not yet definitive. One study, published in the journal Neurology, followed nearly 2,000 Japanese adults for over 20 years. The study found that those with the lowest blood pressure were more than twice as likely to develop dementia as those with the highest blood pressure. Another study, published in the journal JAMA Neurology, looked at data from over 6,000 adults in the United States. This study found that low blood pressure was associated with an increased risk of dementia, even after taking into account other risk factors such as high blood pressure, diabetes, and smoking.

 So what is the connection between low blood pressure and dementia? 

One theory is that low blood pressure may lead to a decrease in blood flow to the brain. This can damage brain cells and lead to dementia. Another theory is that low blood pressure may be a marker of underlying cardiovascular disease. This means that people with low blood pressure may already have damaged blood vessels, which could lead to dementia. Further research is needed to confirm the link between low blood pressure and dementia. In the meantime, if you have low blood pressure, it is important to keep your other risk factors for dementia in mind, such as high blood pressure, diabetes, and smoking.