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Circulation. 1962;25:395-398

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(Circulation. 1962;25:395.)
© 1962 American Heart Association, Inc.


Simulated 2:1 Left Bundle-Branch Block

Normalization of the Left Bundle-Branch Block Pattern by Ventricular Extrasystoles

LEO SCHAMROTH M.B., B.CH. (Rand), M.R.C.P. (Edin.)1 ELLIOT CHESLER M.B., B.CH. (Rand), M.R.C.P. (Edin.)1

1 From Baragwanath Hospital and University of the Witwatersrand, Johannesburg, South Africa.

A case is presented of end-diastolic ventricular extrasystoles occurring in bigeminal rhythm during left bundle-branch block; this results in fusion complexes that normalize the bundle-branch block pattern and simulate 2 :1 left bundle-branch block.