In Table 2 the day–night differences are given. The change in diastolic pressure and RPP was the same for both groups, however, the other pressures and HR (Table 2; Fig. 2), and DTF and Adia/Asys changed less in the hypertensive patients (Table 2; Fig. 3). Calculation of oxygen demand using the formula published by Rooke and Feigl [37] gave results very similar to the RPP (normotensives increasing from 3.53 ± 0.07 to 5.54 ± 0.43 after awaking
and hypertensives from 4.77 ± 0.19 to 6.44 ± 0.24 ml O2/ min/100 g.