ECG Counting Check Mate

🫀 ECG Counting Check Mate

Method R-R interval (big boxes) – 300 ÷ boxes R-R interval (small boxes) – 1500 ÷ boxes 6-second strip (QRS count × 10) 3-second marks (QRS count × 20) Value Check Mate ✔ Normal rate: 60–100 bpm. For learning only, not a medical diagnosis.