Secondary hypertension: a practical diagnostic approach.

Secondary hypertension is a relatively uncommon, potentially reversible condition for which physicians should maintain a high index of suspicion. When a patient is found to have elevated blood pressure, a through history should be obtained and a complete physical examination should be performed. Depending on the findings, additional screening and diagnostic studies may be necessary. The most common causes of secondary hypertension are renal parenchymal disease, renovascular disease, coarctation of the aorta, pheochromocytoma, primary hyperaldosteronism, thyroid dysfunction and Cushing's syndrome.