Tachycardia - Differential Diagnosis and Management - Narrow vs Wide, Regular vs Irregular Narrow - Regular: Use P waves. Positive deflection not AVRT/AVNRT. Absent p try adenosine. If see flutter p = AFIutter. • Sinus Tachy. 220-Age, resp variability. • SVT. 140-280, very regular. • Atrial Flutter. 150+/-20, 2:1. Narrow - Irregular: Use P waves. If can't see Afib. If see P, either Flutter or MAT. If not Flutter P waves, is MAT. • AFib. • AFIutter. • MAT. 3 types of Ps. Wide - Regular: Assume VT until proven otherwise. • Monomorphic VTach. Each beat identical. Rate > 120, QRS > 120. • DDx: SVT + Aberrancy, HyperK, NaChBlocker. Wide - Irregular: • Polymorphic VTach. • AFib + BBB. Rate rarely >200. • AFib + Pre-excitation. Rate can be 300! Variable QRS morphology. • Hyperkalemia - Dr. Sarah Foohey @SarahFoohey #Tachycardia #Differential #Diagnosis #Management #cardiology #wide #narrow #algorithm #irregular
