Calculating The QRS Axis

I often get asked what method I use to calculate the frontal axis of an electrocardiogram, and I usually just say that I check if the computer’s numbers look correct and within the right quadrant. The easiest methods of determining the frontal axis don’t necessitate the use of a scientific calculator. The quadrant method just …

Deep Dive: The Classical Criteria

Ventricular Tachycardia Versus Supraventricular Tachycardia with Aberrancy, Part 1 When studying wide complex tachycardias, students of electrocardiography always come across a discipline that is quite challenging at first: the differentiation between ventricular tachycardia and supraventricular tachycardia with aberrant conduction. The various criteria used to arrive at the correct electrocardiographic interpretation is a subject often revisited, …