Prevalence of Abnormal ECG Findings
| ESC 2010 Criteria ‘Group 2’* | Seattle 2013 Criteria | ||
|---|---|---|---|
| TWI | 94 (29%) | TWI | 7 (2%) |
| ≥2 mm in ≥2 adjacent leads | >1 mm in ≥2 adjacent leads | ||
| In V1-V2 only | 89 (27%) | (excluding III, aVR, and V1) | |
| Other | 5 (2%) | ||
| Abnormal LVH | 38 (12%)† | Abnormal LVH | 3 (1%) |
| With pathological TWI | 33 (10%) | With pathologic TWI | 3 (1%) |
| With LAE | 10 (3%) | ||
| With pathologic Q wave | 1 (<1%) | ||
| LAE | 37 (11%)‡ | LAE | 1 (<1%) |
| Lead V1: Negative portion of P | Lead V1: as per ESC AND | ||
| Wave >1 mm in depth and 40 ms in duration | Lead I/II: P wave >120 ms | ||
| Short QT interval | 23 (7%) | Short QT interval | 0 (<0%) |
| QTc ≤380 ms | QTc ≥320 ms | ||
| Long QT interval | 12 (4%)§ | Long QT interval | 1 (<1%) |
| QTc≥440 ms (males) OR | QTc ≥470 ms (males) OR | ||
| QTc≥460 ms (females) | QTc ≥480 ms (females) | ||
| Ventricular pre-excitation | 14 (4%) | Ventricular pre-excitation | 1 (<1%) |
| PR interval <120 ms | PR interval <120 ms AND | ||
| QRS duration >120 ms AND | |||
| Delta wave | |||
| Pathological Q waves | 7 (2%) | Pathological Q waves | 2 (1%) |
| >4 mm in depth | >3 mm in depth OR | ||
| (excluding III and aVR) | >40 ms in duration in ≥2 | ||
| Leads (excluding III and aVR) | |||
| Abnormal incomplete RBBB | 3 (2%) | Abnormal incomplete RBBB | 3 (2%) |
| T wave inversion past V2 | T wave inversion past V2 | ||
| Complete RBBB | 3 (1%) | Not applicable | |
| QRS duration ≥120 ms | |||
| Right-axis deviation | 2 (1%) | Not applicable | |
| QRS axis >110° | |||
| RVH | 1 (<1%) | RVH | 1 (<1%) |
| R in V1+S in V5 >10.5 mm | R in V1+S in V5 >10.5 mm | ||
| AND QRS axis >120° | |||
| Total number of ECG abnormalities | 234 | Total number of ECG abnormalities | 19 |
| Males | 144 | Males | 11 |
| Females | 90 | Females | 8 |
| Total number of abnormal ECGs | 154 (47%) | Total number of abnormal ECGs | 12 (4%) |
| Males | 84 (45%) | Males | 6 (4%) |
| Females | 70 (49%) | Females | 6 (3%) |
Text in italics are definitions of ECG findings according to ESC and Seattle criteria. Bold text indicates summary data.
*There were no participants with left bundle branch block, left axis deviation, ST-segment depression, or multiple premature ventricular contractions.
†LVH with abnormalities: males (n=33, 17%) versus females (n=5, 3%), p<0.001.
‡LAE: males (n=15, 8%) versus females (n=22, 15%), p<0.05.
§Long or short QTc: males (n=26, 8%) versus females (n=9, 3%), p<0.005.
LVH, left ventricular hypertrophy; RBBB, right bundle branch block; RVH, right ventricular hypertrophy; TWI, T wave inversions.