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Higher blood pressure at night than in daytime may be a risk factor for Alzheimer's disease in older men, suggest a new study from researchers at Uppsala University. Higher BP at night than in daytime may increase Alzheimer's disease riskThe study has now been published in the journal Hypertension.'Dementia' is an umbrella term used to describe a category of symptoms marked by behavioural changes and gradually declining cognitive and social abilities. Numerous factors, including hypertension (high blood pressure), affect the risk of developing these symptoms.Under healthy conditions, blood pressure (BP) varies over 24 hours, with lowest values reached at night. Doctors call this nocturnal blood pressure fall 'dipping'.However, in some people, this BP pattern is reversed: their nocturnal BP is higher than in daytime. This blood pressure profile is known as 'reverse dipping'."The night is a critical period for brain health. For example, in mals, it has previously been shown that the brain clears out waste products during sleep, and that this clearance is compromised by abnormal blood pressure patterns. Since the night also represents a critical time window for human brain health, we examined whether too high blood pressure at night, as seen in reverse dipping, is associated with a higher dementia risk in older men," said Christian Benedict, Associate Professor at Uppsala University's Department of Neuroscience, and senior author of the study.To test this hypothesis, the researchers used observational data from one thousand Swedish older men, who were followed for a maximum of 24 years. The included men were in their early seventies at the beginning of the study"The risk of getting a dementia diagnosis was 1.64 times higher among men with reverse dipping compared to those with normal dipping. Reverse dipping mainly increased the risk of Alzheimer's disease, the most common form of dementia," said Xiao Tan, postdoctoral fellow from the same department and first author of this research."Our cohort consisted only of older men. Thus, our results need to be replicated in older women," said Benedict.According to the researchers, an interesting next step would be to investigate whether the intake of antihypertensive (BP-lowering) drugs at night can reduce older men's risk of developing Alzheimer's disease.( With inputs from ANI )Disclaimer: This post has been auto-published from an agency feed without any modifications to the text and has not been reviewed by an editor

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Technology :Higher blood pressure at night than in daytime may increase Alzheimer's disease risk

Higher blood pressure at night than in daytime may be a risk factor for Alzheimer's disease in older men, suggest a new study from researchers at Uppsala University. Higher BP at night than in daytime may increase Alzheimer's disease risk ...