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. 1975 Jan;37(1):9–19. doi: 10.1136/hrt.37.1.9

Classification of ventricular pre-excitation. Vectorcardiographic study.

K G Lowe, D Emslie-Smith, C Ward, H Watson
PMCID: PMC484149  PMID: 1111564

Abstract

In a study of 45 cases of ventricular pre-excitation, 19 were classified as type A and 20 as type B according to Rosenbaum's criteria, which depend on the polarity of the major deflections in the right praecordial leads and not, as is commonly thought, on the direction of the delta vector. Six cases that could not be classified as type A or type B were termed intermediate. Vectorcardiograms were recorded from 29, and these showed a wide but continuous range of values for both the delta and the main QRS vectors in all three planes. Any classification based on these features must, therefore, depend on arbitrary quantitative data. Three patients in this series had associated right bundle-branch block. A review of the published reports on the association of pre-excitation and bundle-branch block failed to provide a rational basis for the classification of pre-excitation. It is emphasized that Rosenbaum's classification is empirical and its validity is questioned.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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