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Hypertensive cerebrovascular disease and the renin-angiotensin system
G Rossi1, A Rossi, A Sacchetto
1Department of Clinical and Internal Medicine, University of Padua, University Hospital, Italy.
Insights
Arterial hypertension accelerates atherosclerosis, increasing stroke risk. The renin-angiotensin system may contribute to this process, though further proof is needed.
Area of Science:
- Cardiovascular Medicine
- Nephrology
- Neurology
Background:
- Arterial hypertension is a primary driver of cardiovascular disease, linked to heightened risks of stroke and myocardial infarction.
- Hypertension-induced arterial wall remodeling, particularly accelerated atherosclerosis, is implicated in these complications.
- The direct correlation between blood pressure and atherosclerosis severity is less clear than with hemorrhagic stroke, suggesting other contributing factors.
Purpose of the Study:
- To review experimental and clinical evidence on the renin-angiotensin system's role in cardiovascular remodeling.
- To examine the system's involvement in cerebrovascular atherogenesis.
- To assess the association between angiotensin II and thrombotic stroke.
Main Methods:
- Review of existing experimental and clinical studies.
- Analysis of data on the renin-angiotensin system's effects on the cerebrovascular system.
- Examination of the link between angiotensin II and stroke pathogenesis.
Main Results:
- Evidence suggests the renin-angiotensin system influences cardiovascular remodeling and cerebrovascular atherogenesis.
- Data indicate a potential association between angiotensin II and an increased risk of thrombotic stroke.
- The precise contribution of the renin-angiotensin system to carotid artery atherosclerosis requires further investigation.
Conclusions:
- The renin-angiotensin system's role in accelerated carotid artery atherosclerosis and cerebrovascular disease needs definitive proof.
- Current evidence supports the hypothesis that the renin-angiotensin system may exert a detrimental effect.
- Further research is warranted to fully elucidate the renin-angiotensin system's impact on hypertension-related vascular complications.
Background:
Arterial hypertension is the leading cause of cardiovascular disease and is associated with an increased risk of stroke and heart attack. These complications have been largely attributed to the remodeling of the arterial wall, including accelerated atherosclerosis occurring in hypertensive patients. Although the risk of haemorrhagic stroke seems to be directly related to the level of blood pressure elevation, no such tight relationship has been found between blood pressure levels and atherosclerosis. This observation has led to the concept that a number of genetic, humoral, and cellular factors may be involved in atherogenesis in hypertensive patients.
Summary Of Review:
The experimental and clinical evidence concerning the role of the renin-angiotensin system in cardiovascular remodeling and atherogenesis of the cerebrovascular bed as well as the data supporting an association between angiotensin II and thrombotic stroke are examined.
Conclusions:
The contribution of the renin-angiotensin system to the pathogenesis of accelerated carotid artery atherosclerosis and particularly of cerebrovascular disease remains to be definitively proven. However, the bulk of experimental and clinical data are consistent with the hypothesis that the renin-angiotensin system may play a detrimental role.