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Published on: March 22, 2016
Hypertension, hypertension-clustering factors and Alzheimer's disease
Ingmar Skoog1, Deborah Gustafson
1Institute of Clinical Neuroscience, Section of Psychiatry, Sahlgrenska Hospital, Göteborg University, Göteborg, Sweden. Ingmar.Skoog@neuro.gu.se
Insights
High blood pressure, or hypertension, is a significant risk factor for cardiovascular events and Alzheimer's disease. Managing hypertension may substantially reduce the overall incidence of dementia.
Area of Science:
- Neurology
- Cardiovascular Medicine
- Public Health
Background:
- Hypertension is a major risk factor for stroke, atherosclerosis, and cardiovascular mortality.
- Elevated blood pressure, even within normal ranges, increases cardiovascular event risk.
- Hypertension is linked to Alzheimer's disease (AD) and its neuropathological features, with blood pressure often decreasing before dementia onset.
Purpose of the Study:
- To explore the association between hypertension and Alzheimer's disease.
- To understand the complex relationship between vascular health and neurodegenerative disorders.
- To highlight the potential impact of hypertension management on dementia prevalence.
Main Methods:
- Review of existing epidemiological and clinical studies on hypertension and dementia.
- Analysis of the correlation between blood pressure levels and cognitive decline.
- Examination of potential biological mechanisms linking hypertension and Alzheimer's disease.
Main Results:
- High blood pressure is a long-term predictor of Alzheimer's disease.
- Hypertension often co-occurs with other vascular risk factors associated with AD.
- The precise mechanisms linking hypertension and AD pathogenesis remain under investigation, with possibilities including cerebrovascular damage or shared biological pathways.
Conclusions:
- Hypertension is a modifiable risk factor that may influence the development or progression of Alzheimer's disease and dementia.
- Effective management of hypertension could significantly impact the global burden of dementia.
- Further research is needed to elucidate the intricate relationship between hypertension and neurodegeneration.
Abstract:
Hypertension is a risk factor for stroke, ischemic white matter lesions, silent infarcts, general atherosclerosis, myocardial infarction and cardiovascular morbidity and mortality. This risk increases with increasing blood pressure also at blood pressure within the normal ranges, and a high percentage of these cardiovascular events occur in those with normal blood or mild hypertension. Several studies have reported that high blood pressure precedes Alzheimer's disease by decades, but blood pressure decreases the years before dementia onset and is lower in individuals with Alzheimer's disease than in controls. High blood pressure has also been related to the neuropathological manifestations of Alzheimer's disease. Hypertension often clusters with other vascular risk factors, including diabetes mellitus, obesity, and hypercholesterolemia. Also, these risk factors have been related to Alzheimer's disease. The exact mechanism behind these associations is not clear. Hypertension may cause cerebrovascular disease that may increase the likelihood that individuals with AD encephalopathy will express a dementia syndrome, but hypertension may also accelerate the AD process, subclinical AD may lead to increased blood pressure, and similar biological mechanisms may be involved in the pathogenesis of both disorders. Hypertension is a common disorder and often untreated. Even if hypertension only results in a moderately increased risk of AD, or overall dementia, better treatment of hypertension may have an immense effect on the total numbr of demented individuals.
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