The criteria to diagnose a LAFB, or LAHB, on ECG include the following: Left axis deviation of at least -45 degrees The presence of a qR complex in lead I and a rS complex in lead III Usually a rS ...

This ECG (Figure 1), recorded in the emergency room ... Brugada's criteria favor VT (no RS complex in any precordial lead). As the patient is hemodynamically unstable, cardioversion after IV ...