Pseudopseudoblock

Report:

Sinus tachycardia

SVEB (second beat)

Non-specific ST/T changes

Electrode artefact V4-6.

Comment:

Isolated non-conducted P wave, without any disturbance of the sinus rate, is what a pseudoblock due to a concealed bundle of His extrasystole would look like. Usually, however, there are conducted junctional or ventricular ectopic beats elsewhere.

In this case, the QRS may be missing, but its T wave is miraculously preserved, obviating the need for further discussion!

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