| Feature | Normal Value | Normal Limit |
|---|---|---|
| P width (Pf - Pi) | 110ms | +20ms |
| PQ/PR interval (Qi - Pi) | 160ms | +40ms |
| QRS width (J - Qi) | 100ms | +20ms |
| QT interval (Tf - Qi) | 400ms | +40ms |
| ST segment (Ti - J) | 150ms | - |
| T width (Tf - Ti) | 150ms | - |
| P amplitude | 0.15mV | +0.05mV |
| QRS height | 1.50mV | +0.50mV |
| ST level | 0.00mV | +0.10mV |
| T amplitude | 0.30mV | +0.20mV |