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Risk of cerebral hypoperfusion with antihypertensive therapy
S C Fagan1, L W Payne, S C Houtekier
1Department of Pharmacy Practice, College of Pharmacy and Allied Health Professions, Wayne State University, Detroit, MI 48202.
Insights
Effective hypertension treatment reduces stroke, but some patients face risks from antihypertensive therapy. Elderly individuals and those with severe or acute cerebrovascular conditions require cautious blood pressure management to prevent iatrogenic stroke.
Area of Science:
- Neurology
- Cardiology
- Pharmacology
Background:
- Effective hypertension management is crucial for reducing stroke incidence.
- Certain antihypertensive therapies can paradoxically increase the risk of cerebral ischemia and infarction in specific patient groups.
- Identifying at-risk populations is essential for safe treatment.
Purpose of the Study:
- To review the impact of common antihypertensive drug classes on cerebral blood flow.
- To identify patient subsets at higher risk for iatrogenic stroke due to antihypertensive therapy.
- To inform clinical practice regarding cautious blood pressure management.
Main Methods:
- Review of existing literature on antihypertensive medications and their effects on cerebral hemodynamics.
- Analysis of studies examining cerebral blood flow changes with beta-blockers, ACE inhibitors, vasodilators, and calcium-channel blockers.
- Identification of patient characteristics associated with increased risk of adverse cerebrovascular events.
Main Results:
- Antihypertensive medications can affect cerebral blood flow, with variable effects across different drug classes and patient populations.
- Elderly patients, those with malignant hypertension, acute stroke, or occlusive cerebrovascular disease are at increased risk.
- Predicting individual patient risk of cerebral hypoperfusion remains challenging.
Conclusions:
- While hypertension control is vital, clinicians must exercise caution when treating high blood pressure in at-risk populations.
- Awareness of potential iatrogenic stroke risks associated with antihypertensive therapy is critical.
- Personalized treatment strategies are needed to balance stroke prevention and risk mitigation.
Abstract:
The effective treatment of hypertension is a major factor in the declining incidence of stroke in North America. There are subsets of patients, however, in which antihypertensive therapy may actually cause cerebral ischemia and infarction. Elderly patients and those with malignant hypertension, acute stroke, and occlusive cerebrovascular disease appear to be the populations at greatest risk of iatrogenic stroke. This article reviews the effect of beta-blockers, angiotensin-converting enzyme inhibitors, direct vasodilators, and calcium-channel blockers on cerebral blood flow in various populations. Although many investigations have been performed, it remains difficult to predict the risk of cerebral hypoperfusion due to antihypertensive medication in an individual patient. It is best for practitioners to be aware of the patient populations at risk and treat high blood pressure cautiously in these patients.