Microlife WatchBP 03 Mode D'emploi page 159

Blood pressure load: The percentage of blood pressure (BP) readings above a certain
threshold
Level [2]. On default this is according to the recommended thresholds of 135/85 mmHg
during daytime and 120/70 mmHg during the night time. However these threshold levels
can be changed with the button "report settings".
Normal values: The recommended levels of normality for ambulatory BP measurement
in adults is 135 mmHg and 85 mmHg during daytime (Awake) for systolic and diastolic
pressure, respectively. For night time (Asleep) these values are 120 mmHg and 70
mmHg for systolic and diastolic pressure [3]. In the PDF graph the normal values are
provided with the horizontal grey bars.
Percentage of successful readings: According to European Society of Hypertension
(ESH) recommendations the percentage of successful readings should be similar to or
more than 70% [4]. When the percentage of readings is lower than 70% the number will
be provided in red, which indicates that another 24-hour measurement should be taken.
Dip: The percentage at which blood pressure decreases at night. Dip is calculated with
the following formula: (awake BP - asleep BP) / (awake BP) * 100% [5]. Several studies
have shown that there is an inverse correlation with cardiovascular risk and blood
pressure decrease during the night [6, 7]. Some even have shown that the nocturnal
blood pressure is the best prognostic factor for cardiovascular mortality [8, 9]. Patients
can be classified as dippers (≥10% decrease in BP at night) and non-dippers (<10%
decrease in BP at night) the latter group is expected to have a poorer cardiovascular
prognosis than dippers [6]. See also Figure 1 for classification based on calculation.
Figure 1.