PMID: 56945Feb 1, 1976

'Supernormal' phase in hemiblock conduction

British Heart Journal
L Schamroth


A case is described where the basic sinus rhythms is associated with an advanced degree of left anterior hemiblock. The rhythm is complicated by atrial extrasystoles, associated with a lesser degree of left anterior hemiblock. This paradox of 'supernormality' is explained on a critical interplay of differential refractoriness within the divisions of the left bundle-branch.


Mar 1, 1968·Circulation Research·R W ChildersG K Moe

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