Table 4

 Presenting symptoms, changes on the electrocardiogram and cardiac markers in patients with and without acute coronary syndrome and with raised troponin T levels

No ACS, n = 118ACS, n = 195p Value
ACS, acute coronary syndrome; LBBB, left bundle branch block; RBBB, right bundle branch block.
Values in parentheses are percentages or 25th and 75th centiles.
*Presenting electrocardiogram (ECG) was unavailable in four patients without ACS.
Symptoms
    Chest pain15 (12)112 (57)<0.001
    Breathlessness38 (32)34 (17)0.003
    Collapse22 (19)21 (11)0.050
    Others44 (37)28 (14)<0.001
ECG*
    ST elevation2 (2)45 (23)<0.001
    ST depression6 (5)52 (27)<0.001
    T-wave inversion11 (9)33 (17)NS
    LBBB or RBBB18 (15)19 (10)NS
    Atrial fibrillation or flutter48 (41)21 (11)<0.001
Cardiac markers
    Creatine kinase (U/l)115 (62, 216)284 (110, 787)<0.001
    Troponin T (μg/l)0.05 (0.03, 0.08)0.34 (0.09, 1.52)<0.001
    Number of troponin T measurement1 (1, 1)1 (1, 1)NS