50-100

Question 1

The differential diagnosis for a regular narrow-complex tachycardia includes:

Answer 1

Atrial flutter Atrial tachycardia AV nodal reentrant tachycardia AVRT (ie, WPW) with orthodromic conduction Junctional tachycardia Narrow complex VT Sinus tachycardia

Question 2

clinical significance pvc’s

Answer 2

Right ventricular PVCs: LBBB-like morphology, not necessarily pathologic

Left ventricular PVCs: RBBB-like morphology, usually pathologic, more likely to precipitate ventricular fibrillation

R-on-T PVC- PVC falls on T-wave of normal beat and can precipitate ventricular fibrillation