Cardiovascular effects of weight reduction versus antihypertensive drug treatment: a comparative, randomized, 1-year study of obese men with mild hypertension

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Abstract
The aim of the study was to compare cardiovascular effects of weight reduction and sodium restriction with antihypertensive drug treatment in obese middle-aged men with mild hypertension in an open randomized trial lasting for 1 year, preceded by a 6-week run-in period. In the diet group (n = 31), weight decreased by 7.8 kg and salt intake by 2 g/day. In the other group (n = 30), treatment was structured with atenolol as the first line drug. The differences in antihypertensive response were highly significant when measured as casual blood pressure, with drug treatment being favoured. Echocardiographic estimations of left ventricular morphology and function showed no difference in effects between the two treatment modalities. Further analyses showed that the presence of previous antihypertensive treatment was modulating the effect of intervention on left ventricular mass. The response to treatment in plethysmographic estimations of resistance at maximal dilatation in the forearm did not differ between the groups. We conclude that drug treatment was superior to the diet regimen in controlling hypertension, that no differences were observed in effects on cardiovascular structure and that previous antihypertensive treatments seems to be a potent confounding factor that should be taken into consideration in future studies.

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