Table 2.
Findings on admission ECG related to hs-cTnT
| All patients | hs-cTnT ≤14 ng/L | hs-cTnT > 14 ng/L | p value | |
|---|---|---|---|---|
| Heart rate (n = 279) |
71.9 (±15.5) |
73.2 (±16.2) (n = 127) |
76.7 (±20.2) (n = 152) |
0.296 |
| Pacemaker (n = 279) |
3 (1.1) |
1/127 (0.8) |
2/152 (1.3) |
0.996 |
| Atrial fibrillation/ flutter (n = 276) (2) |
72 (25.8) |
14/127 (11.0) |
58/152 (38.2) |
<0.001 |
| PR interval (n = 207) (1) |
173.4 (±33.0) |
167.6 (±31.0) (n = 113) |
180.4 (±34.1) (n = 94) |
0.005 |
| QRS duration (n = 276) (2) |
103.0 (±29.3) |
97.7 (±17.1) (n = 126) |
107.5 (±35.9) (n = 150) |
0.010 |
| QTc interval (n = 276) (2) |
416.5 (±38.2) |
413.0 (±24.2) (n = 126) |
419.5 (±46.7) (n = 150) |
0.010 |
| Right bundle branch block (n = 276) (2) |
19 (6.9) |
4/126 (3.2) |
15/150 (10.0) |
0.026 |
| Left bundle branch block (n = 276) (2) |
12 (4.3) |
4/126 (3.2) |
8/150 (5.3) |
0.381 |
| Q wave (n = 276) (2) |
34 (12.3) |
11/126 (8.7) |
23/150 (15.3) |
0.096 |
| Left ventricular hypertrophy (n = 264) (2, 3, 4) |
63 (23.9) |
21/122 (17.2) |
42/142 (29.6) |
0.019 |
| ST segment elevation (n = 201) (2, 3, 5) |
6 (3.0) |
3/101 (3.0) |
3/100 (3.0) |
0.990 |
| ST segment depression (n = 201) (2, 3, 5) |
29 (14.4) |
9/101 (8.9) |
20/100 20.0) |
0.025 |
| T-wave inversion (n = 201) (2, 3, 5) | 31 (15.4) | 10/101 (9.9) | 21/100 (21.0) | 0.029 |
Categorical variables are presented in absolute values with percentages; n (%). Continuous variables are presented as mean (±SD).
hs-cTnT, high sensitivity cardiac troponin T.
(1) Excluded if presence of atrial fibrillation/ flutter.
(2) Excluded if presence of pacemaker.
(3) Excluded if presence of left bundle branch block.
(4) Sokolow-Lyon voltage > 3.5 mV and/or Cornell product > 2440 mm x ms.
(5) Excluded if presence of left ventricular hypertrophy.