Video answer: Understanding ecg/ekg: qrs transitional zone and r wave progression explained, animation
Top best answers to the question «Why is r wave positive»
The R wave is very positive because early ventricular depolarization is largely directed toward this lead. The S wave is also present because the terminal depolarization of the upper wall of the left ventricle is directed away from aVF.
Video answer: Intro to ekg interpretation - qrst changes