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Relation between prognosis and the blood pressure before and during treatment of hypertensive patients

D G Beevers, J Johnston, B L Devine

    Clinical Science and Molecular Medicine. Supplement
    |December 1, 1978
    PubMed

    Insights

    Achieving lower blood pressure during treatment is key for preventing stroke, more so than initial levels. This study highlights the benefits of antihypertensive therapy in reducing stroke risk.

    Area of Science:

    • Cardiology
    • Hypertension Research
    • Clinical Outcomes

    Background:

    • Hypertension is a major risk factor for cardiovascular complications.
    • Understanding the predictive power of blood pressure (BP) levels, both baseline and treated, is crucial for managing hypertension.
    • Assessing the relative importance of systolic and diastolic BP in complication development is essential.

    Purpose of the Study:

    • To evaluate the predictive significance of untreated baseline and achieved treated blood pressures on hypertension complications.
    • To determine the relative importance of systolic versus diastolic blood pressure in predicting adverse outcomes.
    • To confirm the benefits of antihypertensive therapy in preventing specific cardiovascular events.

    Main Methods:

    • Statistical analysis of univariate differences in BP between patients with and without complications.
    • Analysis of 1247 treated hypertensive patients.
    • Comparison of predictive power between baseline and achieved BP levels.

    Main Results:

    • Achieved blood pressures during treatment were stronger predictors of stroke than baseline pressures in both sexes.
    • Antihypertensive therapy demonstrated benefits in stroke prevention.
    • Some evidence suggested therapy prevented myocardial infarction in men and angina in women.
    • No specific drug class, including beta-blockers and thiazides, showed superior benefit in preventing coronary heart disease.
    • Achieved systolic BP was a better predictor of stroke than diastolic BP; trends for coronary heart disease were inconsistent.

    Conclusions:

    • Achieved blood pressure control during antihypertensive therapy is paramount for stroke prevention.
    • Therapeutic interventions effectively reduce stroke incidence.
    • While therapy shows promise for other cardiovascular events, specific drug classes do not confer additional protection against coronary heart disease based on this study.
    • Systolic blood pressure control is a key target for stroke prevention.

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