We have previously discussed physiologic ventricular aberration with atrial ectopy or atrial fibrillation with a rapid ventricular response. There is another type of ventricular aberration, which is slower and represents abnormal bundle branch physiology. This is a rate dependent bundle branch block.

AV with slow ventricular response. The rate is 40BPM. In the good old days this was digitalis toxicity until proven otherwise. The clue is Bifascicular block. Many cardiologists are reluctant to call this complete heart block as there is no AV dissociation.Don’t be scared to call this complete heart block because that is what it is!!

This week we had a Holter monitor recording reported as complete heart block. For obvious reasons this can be a serious diagnosis, but the reporting cardiologist felt it was Wenckebach sequences and requested a review.

Vagal Hypertonia is a topic that is often confusing and misunderstood. And although we have touched on the topic briefly in the past, Dr Harry Mond delves a little deeper in a bid to clear up any confusion.

While the QT Interval is a topic that few Cardiologists are experienced in, we review several aspects including how it can be measured, while discussing some of the surrounding controversies.

The shock of Ping-Pong in the His-Purkinje system combined with severe digitalis toxicity is the discussion of this rare trace discovered at CardioScan. Medical Director Medicine Dr Harry Mond shares what it reveals and the talks about the changing treatment regimes for such a case.

Dr Harry Mond explores the various arrhythmic events that can interrupt and terminate Wenckebach AV sequences including non-conducted atrial ectopics.

Not all ECG recordings are straightforward, as illustrated by this "bizarre" ECG. In this latest edition in our clinical case studies series, our Medical Director Dr Harry Mond explains how he assessed an ECG he was asked to look at, and how eliminated incorrect solutions to the symptoms being presented.

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!

We explore the many variations of Wenckebach AV block with a pivotal focus on the atypical, typical and absolute occurrences. We also define the three features needed in order to make a correct diagnosis.

Dr Harry Mond shows us an example of the all too common busy ECG and explores how to report on them successfully.

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.