Frequent Cuff Inflations May Disrupt the Accuracy of 24-hour Ambulatory Blood Pressure Monitoring

24-hour ambulatory blood pressure monitoring (ABPM) is superior to office blood pressure (BP) for assessing cardiovascular risk. On the other hand, repeated cuff inflations during ABPM can cause discomfort and reduced quality of sleep. A high frequency of measurement during ABPM might result in erroneously high BP measurement, incorrect hypertension diagnoses, unnecessary treatment or just overtreatment with antihypertensive medication and potentially serious side effects. The purpose of this study is to investigate whether the frequency of measurements during ABPM impacts the measured BP during ABPM. Patients will be recruited from the Clinic of Hypertension at Aarhus University Hospital, Denmark. The study will be conducted as a randomized controlled crossover study. Participants will undergo two 24-hour ABPMs: One with a low frequency of measurement, 1-time per hour during the day and 1-time per hour during the night, and one with a high frequency, 3-times/hour during the day, and 2-times/hour at night. The primary endpoint will be the difference in 24-hour mean systolic BP between the high- and low frequency measurement ABPM.