Responses to tilt TT in patients with presumed NMS (ILR-documented and ILR-undocumented) and in patients in whom NMS was not confirmed by ILR findings
| TT protocol/response | No ILR diagnosis n=282 | NMS n=136 | Non-NMS n=21 | p Value (NMS likely vs non-NMS) |
|---|---|---|---|---|
| Passive+drug challenge (%): | ||||
| Any positive response | 119 (42) | 76 (56) | 9 (43) | 0.35 |
| Negative response | 163 (58) | 60 (44) | 12 (57) | |
| Passive+drug challenge (%): | ||||
| Asystolic response (VASIS 2B) | 24 (9) | 28 (21) | 0 (0) | 0.03 |
| Any non-asystolic response | 258 (91) | 108 (79) | 21 (100) | |
| Passive only (%): | ||||
| Any positive response | 27 (10) | 22 (16) | 2 (10) | 0.74 |
| Negative response | 255 (90) | 114 (84) | 19 (90) | |
ILR, implantable loop recorder; NMS, neurally mediated syncope; TT, table testing.