Normal cardiac electrophysiology values

Important intervals in cardiac electrophysiology

1. PA interval: 25-55 ms

2. AH interval: 55-125 ms

3. HBE interval: <30 ms

4. HV interval: 35-55 ms

5. QRS: ≤ 100 ms

6. Corrected QT interval (QTc): ≤ 450 ms (for males); ≤ 470 ms (for females)

7. Sinus node recovery time (SNRT): ≤1500 ms

8. Corrected sinus node recovery time (CSNRT): ≤ 550 ms

9. Sinoatrial conduction time (SACT): 50-115 ms

10. Atrial effective refractory period (ERP): 180-330 ms

11. AV nodal ERP: 250-400 ms

12. Ventricular ERP: 180-290 ms

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