Table 2 24-hour ambulatory blood pressure monitoring and Holter analysis for heart rate variability with each visit.
| Â | Â | Without Mask | With Mask |
|---|---|---|---|
24 hour | SBP, mmHg | 106 (100 – 112) | 106 (101 – 111) |
|  | DBP, mmHg | 69 (66 – 73) | 70 (67 – 73) |
|  | MAP, mmHg | 82 (79 – 86) | 82 (78 – 86) |
|  | Heart rate, bpm | 74 (70 – 77) | 72 (68 – 76) |
Night | SBP, mmHg | 100 (93 – 107) | 101 (95 – 106) |
|  | DBP, mmHg | 63 (60 – 67) | 64 (61 – 67) |
|  | MAP, mmHg | 76 (73 – 79) | 75 (71 – 79) |
|  | Heart rate, bpm | 64 (61 – 67) | 61 (58 – 65) |
Day | SBP, mmHg | 110 (104 – 116) | 109 (104 – 114) |
|  | DBP, mmHg | 73 (69 – 76) | 73 (70 – 76) |
|  | MAP, mmHg | 85 (81 – 88) | 85 (81 – 89) |
|  | Heart rate, bpm | 79 (74 – 84) | 78 (73 – 82) |
Heart rate variability | Data validity, % | 95.9 | 95.0 |
|  | Average NN interval, ms | 829 (789 – 869) | 850 (805 – 896) |
|  | pNN50, % | 15.9 (10.7 – 21.0) | 17.9 (14.2 – 21.6) |
|  | RMSSD, ms | 35.1 (29.2 – 41.0) | 37.1 (32.2 – 42.0) |
|  | SDNN, ms | 61.2 (54.9 – 67.5) | 65.6* (59.0 – 72.2) |
|  | Triangular Index | 12.9 (11.9 – 13.9) | 13.8 (13.0 – 14.5) |
|  | LF-power, ms2 | 816 (628 – 1004) | 919* (717 – 1122) |
|  | HF-power, ms2 | 460 (325 – 595) | 485 (400 – 569) |
|  | LFn, ms | 62.8 (56.7 – 68.9) | 64.5 (60.6 – 68.4) |
|  | HFn, ms | 29.2 (25.5 – 32.8) | 30.0 (27.0 – 33.1) |
|  | HF/LF ratio | 0.738 (0.507 – 0.970) | 0.680 (0.519 – 0.842) |