Wednesday, November 17, 2010

Concealed junctional extrasystoles---a cause of pseudo AV block

Here's a case report and brief review.

Barney Marriott used to cite these red flags for the condition:

Abrupt, unexplaind (non-physiologic) lengthening in the PR interval.

Apparent “Mobitz II” AV block but with a normal conducted QRS (but intrahisian AV block can cause this too).

Manifest junctional extrasystoles seen elsewhere.

Electrophysiology at the bedside. Fascinating stuff.

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