Assoc Prof Harry Mond
February 23, 2026
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32 year-old one legged ballerina with acute gout in the amputated leg.
Overnight tracings from Holter monitor recording. There is a pause (red highlight).
What do you think?
The top tracing is Wenckebach second degree AV block.
There is an increasing PR interval (red horizontal arrows) and 2:1 AV block. Such findings are common in the young overnight and are the result of vagal hypertonia.
What is the significance of the two non-conducted P waves?
The first non-conducted P wave (red highlight) times out as a sinus P wave. The second is a non-conducted atrial ectopic, structurally different from the sinus P waves
The timing of the non-conducted atrial ectopic (yellow highlight) can be before or after the non-conducted sinus P wave (red highlight), even in the same patient.
It’s all in the timing.
July 16, 2026
I came upon these ECG tracings of ventricular tachycardia from a Holter study in a 79-year old asymptomatic female. What do you think?
July 9, 2026
No tricks. Just a selection of tracings from a Holter study.Look at each one carefully, use calipers, arrows and highlight and write down your conclusions.
July 2, 2026
I came across these two tracings from the same patient during Holter reporting. Do you agree with the reported diagnoses?
