Clinical characteristics, upright haemodynamic measurements, and heart rate variability indices among the 42 patients with head up tilt test (HUT) induced symptoms
| Cardioinhibitory (n = 21) | Vasodepressor (n = 16) | Psychogenic (n = 5) | p Value | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| 5 Min HUT | End HUT | 5 Min HUT | End HUT | 5 Min HUT | End HUT | ||||||
| Sex (F/M) | 11/10 | 7/9 | 3/2 | NS | |||||||
| Age (years) | 37 (16) | 43 (20) | 39 (21) | NS | |||||||
| Syncopal attacks (n) | 3.5 (4.4) | 3.4 (2.5) | 3.4 (4.0) | NS | |||||||
| HR (beats/min) | 84 (13) | 41 (11) | 87 (14) | 76 (13) | 89 (16) | 86 (15) | 5-150 | ||||
| Systolic BP (mm Hg) | 151 (31) | 67 (15) | 153 (30) | 76 (15) | 157 (29) | 139 (21) | 5-150 | ||||
| Diastolic BP (mm Hg) | 84 (13) | 43 (11) | 85 (15) | 49 (10) | 90 (19) | 102 (22) | 5-150 | ||||
| LFPP(beats/min2) | 7.4 (3.4) | 7.6 (3.6) | 7.4 (3.5) | 7.8 (3.6) | 7.6 (3.7) | 7.8 (3.8) | NS | ||||
| HFPP(beats/min2) | 2.8 (1.5) | 2.9 (1.5) | 2.7 (1.5) | 2.8 (1.6) | 2.8 (1.7) | 2.9 (1.7) | NS | ||||
| LFPP/HFPP | 2.4 (1.3) | 2.5 (1.2) | 2.4 (1.3) | 2.6 (0.9) | 2.5 (1.3) | 2.6 (1.2) | NS | ||||
| LFBA (beats/min2/Hz) | 0.5 (0.3) | 0.6 (0.3) | 0.5 (0.3) | 0.6 (0.3) | 0.5 (0.3) | 0.6 (0.3) | NS | ||||
| HFBA (beats/min2/Hz) | 0.4 (0.3) | 0.5 (0.3) | 0.4 (0.3) | 0.5 (0.3) | 0.4 (0.3) | 0.5 (0.2) | NS | ||||
| LFBA/HFBA | 1.2 (0.6) | 1.3 (0.6) | 1.2 (0.6) | 1.3 (0.6) | 1.2 (0.6) | 1.3 (0.6) | NS | ||||
Values are mean (SD).
↵5-150 (Univariate analysis): p < 0.05 (5 min vend HUT results between groups).
BA, bandwidth area; BP, blood pressure; HF, high frequency (0.15 to 0.4 Hz); HR, heart rate; LF, low frequency (0.04 to 0.15 Hz); PP, power peak.