Abstract
Prevention of complications of hypertension requires the lowering of blood pressure. The therapeutic goal is to achieve and maintain a diastolic pressure of less than 90 mm Hg with minimal adverse effects. The treatment of patients with established diastolic blood pressures between 90 and 104 mm Hg (determined from three separate readings) should be individualized; general measures such as weight loss and salt restriction should be tried first as an alternative to drug therapy. Patients with diastolic pressure in excess of 104 mm Hg should be treated with antihypertensive drugs; the first step should be the use of a thiazide diuretic in addition to general measures. Patients with diastolic pressures of 90 to 115 mm Hg may require the addition of a beta-adrenergic-receptor antagonist, methyldopa or clonidine if the therapeutic goal is not achieved; rarely they require the further addition of hydralazine or prazosin. Patients with diastolic pressures of 116 to 129 mm Hg usually require initially both a thiazide diuretic and a beta-blocker, methyldopa or clonidine; if the therapeutic goal is not achieved, hydralazine or prazosin is added, and if a further hypotensive effect is required guanethidine can be added. Patients with severe hypertension (diastolic pressures greater than 130 mm Hg) may require urgent treatment with combinations of drugs of all three levels. Emphasis should be placed on individualized therapy and patient compliance in the assessment of therapeutic failures. These "step-care" guidlines represent a framework for antihypertensive therapy devised from information available in 1977. It is not a rigid scheme and should be adjusted to the individual patient to ensure as normal a life as possible.
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Selected References
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