REVIEW IN DEPTH: PDF OnlyNormality of ambulatory blood pressureKuznetsova, Tatyana; Emelianov, Dmitri; Staessen, Jan A.Author Information Hypertension and Cardiovascular Rehabilitation Unit, Department of Cardiovascular and Molecular Research, University of Leuven, Leuven, Belgium. Blood Pressure Monitoring: October 1999 - Volume 4 - Issue 5 - p 227 Buy Abstract An operational threshold for making clinical decision on the basis of ambulatory blood pressure monitoring must be defined. This requires that the relationship between the ambulatory pressure and the incidence of cardiovascular complications be clarified beyond present understanding. Preliminary cut-off points for ambulatory monitoring were derived by averaging the 95th percentiles of the ambulatory blood pressure measurements for the normotensive subjects enrolled in various large-scale studies. According to this approach, the upper limits of normotension, calculated by rounding downwards, would be 130/80 mmHg for the 24 h blood pressure and 135/85 and 120/70 mmHg for the daytime and night-time blood pressures. Abnormality, obtained by rounding upwards, would be blood pressure levels exceeding 135/85, 140/90 and 125/75 mmHg, respectively. Copyright © 1999 Wolters Kluwer Health, Inc. All rights reserved.