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Clinical Trial
Comparative Study
Journal Article
Multicenter Study
Randomized Controlled Trial
Research Support, Non-U.S. Gov't
Effects of losartan or atenolol in hypertensive patients without clinically evident vascular disease: a substudy of the LIFE randomized trial.
Annals of Internal Medicine 2003 August 6
BACKGROUND: Cardiovascular morbidity and mortality are reduced by treatment with the angiotensin II AT(1)-receptor antagonist losartan compared with conventional treatment with the beta-blocker atenolol in patients with hypertension and electrocardiogram-defined left ventricular hypertrophy, many of whom had known vascular disease.
OBJECTIVE: To determine whether losartan reduces cardiovascular event rates in lower-risk hypertensive patients without clinically evident vascular disease.
DESIGN: Subgroup analysis of a randomized trial.
SETTING: The Losartan Intervention for Endpoint reduction in hypertension (LIFE) study.
PATIENTS: 6886 men and women (57% women) 55 to 80 years of age (average, 66 years) with essential hypertension (sitting blood pressure, 160 to 200/95 to 115 mm Hg [average, 174/98 mm Hg]) and electrocardiogram-defined left ventricular hypertrophy who did not have clinically evident vascular disease.
INTERVENTION: Patients were randomly assigned to once-daily double-blind treatment with losartan or atenolol.
MEASUREMENTS: An end point committee ascertained end points (cardiovascular death, stroke, or myocardial infarction).
RESULTS: Blood pressure was reduced similarly by losartan and atenolol. The primary composite end point occurred in 282 losartan-treated patients (17.5 per 1000 patient-years) and 355 atenolol-treated patients (21.8 per 1000 patient-years; relative risk, 0.81 [95% CI, 0.69 to 0.95]; P = 0.008). Cardiovascular death occurred in 103 losartan-treated patients and 132 atenolol-treated patients (relative risk, 0.80 [CI, 0.62 to 1.04]; P = 0.092), stroke (nonfatal and fatal) occurred in 125 losartan-treated patients and 193 atenolol-treated patients (relative risk, 0.66 [CI, 0.53 to 0.82]; P < 0.001), and myocardial infarction (nonfatal and fatal) occurred in 110 losartan-treated patients and 100 atenolol-treated patients (relative risk, 1.14 [CI, 0.87 to 1.49]; P > 0.2). New-onset diabetes occurred less often in patients treated with losartan (n = 173) than in patients treated with atenolol (n = 254) (relative risk, 0.69 [CI, 0.57 to 0.84]; P < 0.001). Benefits of losartan treatment were numerically smaller, but not significantly so, in patients with preexisting vascular disease.
CONCLUSION: In hypertensive patients without clinically evident vascular disease, losartan was more effective than atenolol in preventing cardiovascular morbidity and death, predominantly stroke, independent of blood pressure reduction.
OBJECTIVE: To determine whether losartan reduces cardiovascular event rates in lower-risk hypertensive patients without clinically evident vascular disease.
DESIGN: Subgroup analysis of a randomized trial.
SETTING: The Losartan Intervention for Endpoint reduction in hypertension (LIFE) study.
PATIENTS: 6886 men and women (57% women) 55 to 80 years of age (average, 66 years) with essential hypertension (sitting blood pressure, 160 to 200/95 to 115 mm Hg [average, 174/98 mm Hg]) and electrocardiogram-defined left ventricular hypertrophy who did not have clinically evident vascular disease.
INTERVENTION: Patients were randomly assigned to once-daily double-blind treatment with losartan or atenolol.
MEASUREMENTS: An end point committee ascertained end points (cardiovascular death, stroke, or myocardial infarction).
RESULTS: Blood pressure was reduced similarly by losartan and atenolol. The primary composite end point occurred in 282 losartan-treated patients (17.5 per 1000 patient-years) and 355 atenolol-treated patients (21.8 per 1000 patient-years; relative risk, 0.81 [95% CI, 0.69 to 0.95]; P = 0.008). Cardiovascular death occurred in 103 losartan-treated patients and 132 atenolol-treated patients (relative risk, 0.80 [CI, 0.62 to 1.04]; P = 0.092), stroke (nonfatal and fatal) occurred in 125 losartan-treated patients and 193 atenolol-treated patients (relative risk, 0.66 [CI, 0.53 to 0.82]; P < 0.001), and myocardial infarction (nonfatal and fatal) occurred in 110 losartan-treated patients and 100 atenolol-treated patients (relative risk, 1.14 [CI, 0.87 to 1.49]; P > 0.2). New-onset diabetes occurred less often in patients treated with losartan (n = 173) than in patients treated with atenolol (n = 254) (relative risk, 0.69 [CI, 0.57 to 0.84]; P < 0.001). Benefits of losartan treatment were numerically smaller, but not significantly so, in patients with preexisting vascular disease.
CONCLUSION: In hypertensive patients without clinically evident vascular disease, losartan was more effective than atenolol in preventing cardiovascular morbidity and death, predominantly stroke, independent of blood pressure reduction.
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