DIFFERENTIATING TACHYARRHYTHMIAS


("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")