Key Points QRS Morphology Reflects Conduction Pathways: The shape and width of the QRS complex help differentiate between normal conduction, conduction delays, and ventricular-origin rhythms. QRS–T Wave Proportionality Signals Repolarization…
Key Points QRS Axis: The QRS axis represents the sum of all ventricular depolarization vectors and is primarily used to determine the electrical axis of the heart on an ECG….