Table 2 Diagnostic value and likelihood ratio for electrocardiographic parameters to predict pulmonary hypertension in ASD
Parameters | Pulmonary hypertension n = 50 | Non-Pulmonary hypertension n = 94 | Sensitivity (%) | Specificity (%) | PPV (%) | NPV (%) | p value |
|---|---|---|---|---|---|---|---|
QRS axis | 52.0 | 79.8 | 57.8 | 75.8 | 0.225 | ||
≥ 120° | 26 | 19 | |||||
< 120° | 24 | 75 | |||||
P wave at lead II | 50.0 | 96.8 | 89.3 | 78.4 | 0.003 | ||
≥ 3 mm | 25 | 3 | |||||
< 3 mm | 25 | 91 | |||||
R without S at V1 | 56.0 | 93.6 | 82.4 | 80.0 | 0.019 | ||
Yes | 28 | 6 | |||||
No | 22 | 88 | |||||
Q wave at V1 | 36.0 | 97.9 | 90.0 | 74.2 | 0.042 | ||
Yes | 18 | 2 | |||||
No | 32 | 92 | |||||
RBBB | 62.0 | 90.4 | 77.5 | 81.7 | 0.027 | ||
Yes | 31 | 9 | |||||
No | 29 | 85 | |||||
R at V1, V2 or aVR | 62.0 | 79.8 | 62.0 | 79.8 | 0.044 | ||
High | 31 | 19 | |||||
Normal | 19 | 75 | |||||
S at V6 or Lead I | 74.0 | 74.5 | 60.7 | 84.3 | 0.560 | ||
High | 37 | 24 | |||||
Normal | 13 | 70 | |||||
R/S ratio at V1 or V2 > N, or V6 < 1 | 86.0 | 43.6 | 44.8 | 85.4 | 0.398 | ||
Abnormal | 43 | 53 | |||||
Normal | 7 | 41 |