Click on image to view larger version.

Figure 3 Electrocardiographic tracings in leads V₁ through V₃ and the signal-averaged electrocardiogram for a patient with Brugada syndrome and syncopal episodes. The late potentials, represented by the shaded area, are positive, showing an RMS₄₀ <20 µV, and an LAS₄₀ >38 ms.