Head up tilt+ (n = 77) |
Head up tilt+ ATP+ (n = 26) | ATP+ (n = 18) | p Value | |
ATP testing | ||||
Atrioventricular block (3rd degree) | – | 25 (96%) | 18 (100%) | NS |
Sinus pause ⩾ 3 seconds | – | 1 (6%) | 0 (0%) | NS |
Maximum RR interval (s) | – | 8.2 (2.0) | 7.8 (2.6) | NS |
Systolic blood pressure drop (mmHg) | – | 59 (22) | 57 (25) | NS |
Head up tilt testing | ||||
Passive phase | 17 (22%) | 8 (31%) | NS | |
Glyceryl trinitrate | 60 (78%) | 18 (69%) | NS | |
Atrioventricular block (3rd degree) | 4 (5%) | 2 (8%) | – | NS |
Sinus pause ⩾ 3 seconds | 18 (23%) | 5 (19%) | – | NS |
Maximum RR interval (seconds) (median (interquartile range)) | 6.1 (3.7 to 8.0) | 6.8 (4 to 17) | – | NS |
Mixed or vasodepressor type | 55 (71%) | 19 (73%) | – | NS |
Values are mean (SD) or n (%) unless stated.