Ventricular Tachycardia

Question 1

What are the “Classic Signs” of V-tach?

Answer 1

1. Northwest axis — QRS is positive in aVR, negative in I and aVF
2. The taller left rabbit ear sign — There is an atypical RBBB pattern in V1, where the left “rabbit ear” is taller than the right.
3. Negative QRS complex (R/S ratio < 1) in V6