When QRS complex is wide, look for the "slow start".
In VT, electricity travels through the muscle instead of the Purkinje highway. This creates the delay at the beginning of the QRS.
In blue (🔵)here, Josephson's sign.
- notching/ slurring near the lowest point of S wave.
- usually more obvious in precordial leads (V1-V3).
In green (🟢), Brugada's sign.
- RS interval >100ms (2.5 small boxes) in any precordial leads (V1-V6).
- due to slow, inefficient cell-to-cell conduction of a ventricular focus (in contrast, SVT with aberrancy conducts down the bundle branches fast enough that the RS is <100ms).
1. Can you identify the ECG signs marked in blue and green?
2. Which arrhythmia is associated with these findings?