Prognosis and rate dependency of 'complete' left bundle branch block coexisting with acute transmural inferior wall myocardial infarction

A. Castellanos, S. Levy, A. G. Arcebal, A. Mayorga-Cortes, L. Lemberg

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

Six (2.6 per cent) of 235 consecutive patients with acute inferior wall myocardial infarction had complete left bundle branch block. The transmural characteristic of the infarction was proved by the transient appearance of narrow QRS complexes. Whereas tachycardia-dependent complete left bundle branch block was seen four times, bradycardia-dependent block occurred in only two cases. The immediate mortality rate of patients having acute inferior wall myocardial infarction coexisting with complete left bundle branch block was one out of six, 16.7 per cent. The posthospitalization prognosis was good, since five were still alive 18 to 24 months after the acute infarction. The favorable prognosis of the survivors was attributed to the absence of severe heart failure and of electrophysiologically detectable bilateral bundle branch disease. The only death occurred in the patient with type II (Mobitz) block and bilateral bundle branch block. Further studies, however, are necessary to test the validity of these assumptions. In previous reports of left bundle branch block in acute myocardial infarction, the conduction disturbance was present throughout the hospitalization period. This made it difficult to diagnosis as well as locate the infarction. The purpose of this report is to present the electrical features of and prognosis for patients with complete left bundle branch block complicating an acute inferior wall myocardial infarction.

Original languageEnglish (US)
Pages (from-to)981-987
Number of pages7
JournalHeart and Lung: Journal of Acute and Critical Care
Volume6
Issue number6
StatePublished - Dec 1 1977

ASJC Scopus subject areas

  • Pulmonary and Respiratory Medicine
  • Critical Care and Intensive Care Medicine
  • Cardiology and Cardiovascular Medicine

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