Table 3. Association of ECG parameters to LGE presence and abnormal T2w.
| Factor | LGE presence | T2w | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| ECG Factor Absent | ECG Factor Present | Sensitivity | Specificity | p | ECG Factor Absent | ECG Factor Present | Sensitivity | Specificity | p | |
| Abnormal ECG | 47 (36) | 228 (50) | 83 (78–87) | 27 (22–32) | 0.006* | 23 (23) | 94 (30) | 80 (72–87) | 25 (21–31) | 0.215 |
| Wide QRS-T Angle (≥90°) | 197 (44) | 77 (58) | 28 (23–34) | 82 (78–86) | 0.003* | 84 (26) | 31 (33) | 30 (20–36) | 79 (74–83) | 0.180 |
| Low Voltage | 244 (46) | 31 (61) | 11 (8–16) | 94 (90–96) | 0.039* | 101 (27) | 16 (41) | 14 (9–21) | 93 (89–95) | 0.061 |
| fQRS | 187 (43) | 82 (62) | 30 (25–36) | 83 (79–87) | <0.001* | 90 (28) | 25 (28) | 22 (15–30) | 78 (73–83) | 0.989 |
| Q-wave | 234 (46) | 41 (53) | 15 (11–20) | 88 (84–92) | 0.233 | 95 (27) | 21 (36) | 18 (12–26) | 88 (83–91) | 0.131 |
| T-wave | 187 (46) | 86 (49) | 32 (26–37) | 71 (66–76) | 0.448 | 78 (27) | 37 (31) | 32 (24–41) | 72 (67–77) | 0.349 |
| PR Duration (≥200ms) | 230 (46) | 24 (56) | 9 (6–14) | 94 (90–96) | 0.225 | 102 (29) | 7 (24) | 6 (3–13) | 92 (88–95) | 0.604 |
| QRS Duration (≥120ms) | 236 (48) | 39 (40) | 14 (11–19) | 81 (76–85) | 0.103 | 96 (28) | 21 (28) | 18 (12–26) | 82 (77–86) | 0.916 |
| QTc Duration (≥470ms for females, ≥450ms for males) | 174 (45) | 101 (51) | 37 (31–43) | 69 (64–74) | 0.127 | 67 (24) | 50 (35) | 43 (34–52) | 69 (64–74) | 0.021* |
Frequency and (%) is shown for the number of patients who were categorically classified as having Late Gadolinium Enhancement (LGE) or an elevated T2-weighted (T2w) in the absence and presence of ECG characteristics. Sensitivity and specificity with 95% confidence intervals are shown for the ECG parameters to correctly identify patients with LGE or elevated T2w. fQRS: Fragmented QRS
*p<0.05 denotes a significant relationship.