A 44-year-old woman presents to the emergency department with vague complaints about shortness of breath. The following ECG is obtained at triage and brought to you for interpretation:
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…