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Update on the management of hypertension to prevent stroke
Laura Pedelty1, Philip B Gorelick
1Department of Neurology and Rehabilitation, University of Illinois College of Medicine at Chicago, 912 South Wood Street, Room 855N, Chicago, IL 60612, USA. pedelty@uic.edu.
Insights
High blood pressure (hypertension) significantly increases stroke risk, even at lower levels. Early intervention for prehypertension and hypertension is crucial for reducing stroke and cognitive impairment.
Area of Science:
- Cardiovascular Medicine
- Neurology
- Public Health
Background:
- Hypertension is the primary modifiable risk factor for both first-ever and recurrent strokes.
- The relationship between blood pressure (BP) and stroke risk is continuous, extending to levels as low as 115/75 mm Hg.
- Prehypertension is increasingly recognized as a critical stage for early intervention due to the continuum of stroke risk.
Purpose of the Study:
- To summarize the current understanding of hypertension as a risk factor for stroke and cognitive impairment.
- To highlight the benefits of blood pressure reduction and the role of antihypertensive agents.
- To emphasize the importance of lifestyle modifications in managing hypertension and reducing stroke risk.
Main Methods:
- Review of existing literature on hypertension, blood pressure, stroke, and cognitive impairment.
- Analysis of the continuous relationship between blood pressure levels and stroke risk.
- Evaluation of the efficacy of various antihypertensive agents and lifestyle modifications.
Main Results:
- Blood pressure reduction is reliably associated with a decreased risk of stroke.
- Certain agents like ACE inhibitors and ARBs may offer benefits beyond BP lowering.
- Most classes of BP-lowering agents are recommended, often requiring multiple medications for control.
Conclusions:
- Effective blood pressure management, including lifestyle changes and pharmacotherapy, is essential for stroke prevention.
- Early recognition and intervention for prehypertension and hypertension are vital.
- Further research is needed to elucidate the specific mechanisms of benefit for different antihypertensive drug classes in reducing stroke and cardiovascular disease risk.
Abstract:
Hypertension is the leading modifiable risk factor for stroke, including first-ever and recurrent stroke. The association between blood pressure (BP) and stroke risk is continuous and may be documented as low as 115/75 mm Hg. Because of this continuum of risk, and because most strokes occur in individuals with mild hypertension or even normal BP values, we are now beginning to recognize "prehypertension" as a stage in which early recognition and intervention may confer benefit. In addition to increased risk for ischemic and hemorrhagic stroke, hypertension may be associated with increased risk of cognitive impairment. Reductions in BP are reliably associated with reduced stroke risk. Some evidence suggests that certain agents, including angiotensin-converting enzyme inhibitors and angiotensin receptor blockers, may have protective effects beyond BP lowering. Overall, the degree of BP lowering is key, and therefore most classes of BP-lowering agents may be recommended at this point. Many patients with hypertension will require more than one BP-lowering agent to control BP. Lifestyle modification is appropriate at all levels of intervention. Further studies are needed to ascertain the mechanisms of benefit of different classes of antihypertensive agents in the reduction of stroke and cardiovascular disease risk.
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