Circadian Blood Pressure Rhythm in Primary and Secondary Hypertension

281 individuals including normotensives (n=20), patients with mild primary hypertension (n=152), severe primary hypertension (n=30), and various forms of secondary hypertension (renoparenchymal n=29, renovascular n=20, hyperaldosteronism n=6, hyperthyroidism n=14, primary hyperparathyroidism n=9, coarctation of the aorta n=1).

24-hour ambulatory blood pressure monitoring

Normotensive individuals and patients with primary hypertension

Nocturnal blood pressure fall (circadian blood pressure variability)surrogate