Table 2.
Accuracy of ECG criteria for Left and Right Atrial Enlargement as Detected by CMR
| ECG Criteria | Sensitivity (%) | Specificity (%) | PPV (%) | NPV (%) |
| LAE | ||||
| Any ECG Criteria for LAE | 90 | 21 | 31 | 84 |
| P > 0.11s | 84 | 35 | 34 | 85 |
| P mitrale | 8 | 99 | 86 | 74 |
| P axis < 30° | 8 | 90 | 23 | 71 |
| NPTF-V1 > 0.04s·mm | 37 | 88 | 47 | 76 |
| PPTF-aVL > 0.5 mm | 44 | 60 | 30 | 73 |
| RAE | ||||
| Any ECG Criteria for RAE | 17 | 96 | 33 | 91 |
| Inferior P waves > 2.5 mm | 7 | 100 | 67 | 90 |
| Positive P wave in V1 > 1.5 mm | 10 | 96 | 25 | 90 |
CMR: Cardiovascular magnetic resonance. ECG: Electrocardiography. PPV: Positive predictive value. NPV: Negative predictive value. LAE: Left atrial enlargement. RAE: Right atrial enlargement. P mitrale: Notched P wave with interpeak duration > 0.04s. NPTF-V1 > 0.04s·mm: Area of negative P terminal force in lead V1 > 0.04s·mm. PPTF-aVL: Positive P terminal force in lead aVL. Inferior P waves: P wave in any of the leads II, III, or aVF.