This Holter tracings showed a number of 2.8 second nocturnal pauses. A bundle branch block is also present. So the question was asked: Is this high degree AV block and does the patient need a pacemaker?

This week Dr Harry Mond reviews the ventricular ectopic compensatory pause with a focus on full and partial pauses while teaching us a lesson on timing.

After recently discussing the two most common variations of reversed arm and leg leads, we now explore combinations of Right Arm-Right Leg Reversed, including the double twists, & all the tell-tale footprints.

Last week some of you suggested dextrocardia in response to our case of reversed arm leads. This week shows that with dextrocardia the chest leads are very different and how to avoid misdiagnosis

This week, Assoc Prof Mond discusses abnormalities commonly missed by physicians when reporting on ECGs, with a focus on reversed arm leads and how to avoid serious misdiagnosis.

Something rarely seen in Holter monitoring, the ventricular pentageminy with ventricular ectopics every 5th beat, and other curious rhythms!

Last week we proved not all bundle branch blocks are boring. Now we delve even deeper into mistaken rhythms, common misdiagnosis and those rarely talked about, including the crochetage sign

Often asked to review cardiac pacing ECGs, this one was presented as intermittent failure of ventricular capture. Revisiting atrial pacing and the tell-tale clues, we’re able to make the correct diagnosis.

In the final part of this 2-part series, we explore even more exotic ectopy, including ventricular couplets, interpolation, unipolar bigemilets, trigemilets and more.