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| Lead | Duration (ms) | Amplitude Ratio | Maximal Point | ||
| I | Q≥15 | (1) | R/Q≤1 | (1) | 2 |
| II | Q≥20 | (2) | |||
| Q≥15 | (1) | 2 | |||
| aVL | Q≥15 | (1) | R/Q≤1 | (1) | 2 |
| aVF | Q≥25 | (3) | R/Q≤1 | (2) | |
| Q≥20 | (2) | ||||
| Q≥15 | (1) | R/Q≤2 | (1) | 5 | |
| V1 | Any Q | (1) | |||
| R≥25 | (2) | ||||
| R≥20 | (1) | R/S≥1 | (1) | 4 | |
| V2 | Any Q or R≤5 | (1) | |||
| R≥30 | (2) | ||||
| R≥25 | (1) | R/S≥1.5 | (1) | 4 | |
| V3 | Any Q or R≤10 | (1) | 1 | ||
| V4 | Q≥10 | (1) | R/Q or R/S≤0.5 | (2) | |
| R/Q or R/S≤1 | (1) | 3 | |||
| V5 | Q≥15 | (1) | R/Q or R/S≤1 | (2) | |
| R/Q or R/S≤2 | (1) | 3 | |||
| V6 | Q≥15 | (1) | R/Q or R/S≤1 | (2) | |
| R/Q or R/S≤3 | (1) | 3 | |||
