Table 1. The ECG criteria for the detection of LVH included in the study.
| Formula | Definition of LVH | ||
|---|---|---|---|
| Sokolow–Lyon voltage25 | SV1+RV5 or RV6 | ⩾35 mm | |
| Sokolow–Lyon product10,26 | (SV1+RV5 or RV6) × QRS | ⩾3710 mm ⋅ ms | |
| Gubner Ungerleider voltage | R1+S3 | ⩾20 mm | |
| Cornell voltage8 | RaVL+SV3 | ⩾28 mm (men) | |
| ⩾20 mm(women) | |||
| Cornell voltage product10,26 | (RaVL+SV3) × QRS (men) | ⩾2440 mm ⋅ ms | |
| (RaVL+SV3+0.8 mV) × QRS (women) | |||
| Romhilt–Estes score | 1. Amplitude=R or S wave in limb leads ⩾20 mm or SV1–2 ⩾30 mm or RV5–6 ⩾30 mm | 3 points | ⩾5 points: definite LVH ⩾4 points: probably LVH |
| 2. ST-T segment pattern= | |||
| Without digitalis | 3 points | ||
| With digitalis | 1 point | ||
| 3. Left atrial involvement | 3 points | ||
| 4. Left axis deviation ⩾30° | 2 points | ||
| 5. QRS ⩾0.09 s | 1 point | ||
| 6. Intrinsicoid deflection ⩾0.05 s in V5–6 | 1 point |
Abbreviations:
ECG, electrocardiograph; LVH, left ventricular hypertrophy.
ECG scale: 10 mm=1 mV; speed: 25 mm s−1.