I found this sentence in my notes which is not exact enough:
- Excitatory processes have definite direction and magnitude and could therefore be represented as vectors. At any moment there are two points in the heart with the biggest potential difference, which is called electrical axis, characterized by the angel α.
- Under normal conditions -> 30°< angel α < 90°
- Electrical axis gives information about the position of the heart, where the normal position ([arrow to south-east]) represents the biggest amplitude in the III lead
What is the exact electrical axis and of what they are talking about?