Further to our Cardiac Pacing series, Medical Director Dr Harry Mond revisits the three letter code to teach us about Dual Chamber Pacing.

Handed this ECG, we were asked if it was an example of a rate adaptive pacing, which uses changes in transthoracic impedance to increase the pacemaker rate in response to physiologic demand. Assoc Prof H Mond explains how to find the correct diagnosis.

Group beating always provide fascinating ECGs! This week, we take a look at several different combinations of ectopy sequences including ventricular and atrial trigemilets, ventricular bigemilets and more.

In the final part of this 2-part series, Assoc Prof H Mond further explores the different forms of atrial ectopy including the atrial couplet, triplet, run & non-conducted types.

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

Dr Harry Mond explores another form of ECG interference often referred to as 'subtle artefact' which can mimic cardiac arrhythmias and sometimes lead to serious misdiagnoses and inappropriate treatments.

In the last of the Wenckebach case study series, Dr Harry Mond explores several ECGs with fascicular Wenckebach AV sequences with a reminder to always question the tracings!

In the first of a series on the electrocardiography of cardiac pacing, Assoc Prof Mond explores the fundamentals and everything you need to know about the stimulus artefact.

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?