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OBJECTIVE To compare heart rate (HR) and blood pressure (BP) variability in hypertensive patients with or without a fall in BP during the night. METHODS 33 mild to moderato hypertensive patients, mean age 45 +/- 15 years, underwent an echocardiogram, a 24-hr ambultory BP monitoring (ABPM), and a 24-hr ECG monitoring. In addition, a continuous BP recording over 15 minutes was performed between 9 and 11 a.m. both in supine and standing positions, by using digital plethysmography (Finapres device). METHODS non parametric tests. RESULTS [table: see text] CONCLUSIONS In non dippers, morning BP and HR low-frequency oscillations are shifted to a lower level, as compared to dippers. This characteristic is associated with a reversed circadian pattern of sympathetic activity.
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