Average changes of normalised monophasic action potential duration (nMAP), triangularity (MAPd90–25), variability of cycle length (ΔCL), and variability of MAP duration (ΔMAPd90) before onset of atrial fibrillation (AF) compared with changes in patients without AF
| Time before AF | No AF | AF |
|---|---|---|
| nMAPd90 | ||
| −24 hours | 421 (26) ms | 398 (36) ms |
| −3 hours | 354 (45) ms | |
| −30 minutes | p ⩽ 0.01 | 296 (31) ms |
| ΔMAPd90 | ||
| −24 hours | 13 (6) ms | 12 (8) ms |
| −3 hours | 23 (13) ms | |
| −30 minutes | p ⩽ 0.05 | 56 (11) ms |
| MAPd90-25 | ||
| −24 hours | 37 (6) ms | 40 (9) ms |
| −3 hours | 59 (10) ms | |
| −30 minutes | p ⩽ 0.001 | 99 (16) ms |
| ΔCL | ||
| −24 hours | 20 (6) ms | 24 (6) ms |
| −3 hours | 122 (10) ms | |
| −30 minutes | p ⩽ 0.001 | 137 (17) ms |
Values are mean (SD).