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Impact of losartan on stroke risk in hypertensive patients in primary care
1Medical Department, MSD Sharp & Dohme GmbH, Munich/Haar, Germany. kurt.bestehorn@msd.de
Insights
Losartan therapy significantly reduced blood pressure and stroke risk in hypertensive patients, including those with comorbidities. This angiotensin II receptor blocker (ARB) treatment was well-tolerated and demonstrated a 24% relative risk reduction in predicted 10-year stroke risk.
Area of Science:
- Cardiology
- Hypertension Management
- Stroke Prevention
Background:
- Arterial hypertension is a primary predictor of stroke risk.
- The angiotensin II type 1 receptor antagonist (ARB) losartan showed stroke risk reduction in the LIFE study.
- Primary care hypertension management requires effective stroke risk reduction strategies.
Purpose of the Study:
- To evaluate losartan's impact on stroke risk in primary care patients.
- To assess blood pressure reduction and its effect on predicted stroke risk.
- To analyze losartan's efficacy in a large, unselected hypertensive population.
Main Methods:
- Prospective, observational study in 2977 German primary care practices.
- Inclusion of 22,499 unselected hypertensive patients.
- Calculation of 10-year predicted stroke risk using Framingham Score at baseline and after losartan (+/- hydrochlorothiazide) therapy.
Main Results:
- Mean systolic/diastolic blood pressure decreased by -21/-11 mm Hg.
- Average predicted 10-year stroke risk reduced from 28.0% to 22.1% (24% relative risk reduction).
- Losartan was well-tolerated with minimal non-serious adverse events.
Conclusions:
- Hypertensive patients in primary care often have high stroke risk due to comorbidities.
- Losartan therapy effectively lowers blood pressure and reduces associated stroke risk.
- Losartan treatment is well-tolerated and beneficial for stroke risk reduction in hypertensive patients.
Background And Objective:
While a number of conditions and risk factors that increase stroke risk have been identified, arterial hypertension is the most consistent and powerful predictor. The angiotensin II type 1 receptor antagonist (angio-tensin receptor blocker [ARB]) losartan has been shown in the LIFE (Losartan Intervention for Endpoint Reduction in Hypertension) study to decrease stroke risk in hypertensive patients to a substantially greater extent than conventional therapy. We aimed to assess the impact of the blood pressure-lowering effect of losartan therapy on stroke risk in hypertensive patients in primary care.
Methods:
A total of 2977 primary-care practices throughout Germany included 22 499 consecutive unselected patients with a confirmed diagnosis of hypertension in an open-label, prospective, observational study. In addition to demographics, known risk factors for stroke were documented on standardised questionnaires. The 10-year predicted risk of first stroke was calculated according to the Framingham Stroke Risk Score at baseline and after a mean of 94 +/- 24 days of losartan (+/- hydrochlorothiazide [HCTZ]) therapy.
Results:
The mean patient age was 64.1 +/- 10.6 years, and 52.4% were males. Mean systolic/diastolic blood pressure decreased from 160 +/- 15/93 +/- 9 mm Hg at baseline by -21 +/- 14/-11 +/- 9 mm Hg. Besides hypertension, 84.9% of patients had other co-morbidities, of which the most frequent were hypercholesterolaemia (53.0%), diabetes mellitus (36.1%), coronary heart disease (31.1%) and left ventricular hypertrophy (24.2%). The average predicted 10-year stroke risk was 28.0 +/- 21.9% at baseline, and 22.1 +/- 19.5% at study end (relative risk reduction 24 +/- 16%, p<0.05). In subgroups of patients with diabetes or nephropathy, similar effects were noted. Drug-related adverse events were reported in 18 patients; all of these were non-serious.
Conclusion:
Because of the high prevalence of co-morbidities and risk factors, the hypertensive patient population observed in this study presented with a high 10-year stroke risk. Treatment with losartan (+/- HCTZ) was well tolerated and led to a substantial decrease in blood pressure and associated stroke risk.
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