("RRIVCD" = rate-related intraventr. conduction defect)
| Rhythm | Atrial Rate | Ventricular Rate | Other |
| Sinus Tachycardia | 100-190 | Same | |
| MAT | 100-190 | Same | Frequent APC's |
| PSVT | 120-220 | Same if no AV block | |
| Atrial Flutter | 220-350 | 150 (usually) | |
| Atrial Fibrillation | >350 | Variable < 200 unless accessory pathway |
|
| Monomorphic VT | 60-130 | 40-100 ("AIVR"; "slow VT") 100-200 (VT) > 200 ("Rapid VT"; "V Flutter") |