Electrocardiographic aspects of acute left anterior hemiblock induced by exercise

R. A. Oliveros, J. Seaworth, P. W. Dlabal, C. H. Beckmann

Research output: Contribution to journalArticlepeer-review


The intraventricular conduction time was measured during rest, exercise, and recovery in five patients who developed acute left anterior hemiblock during exercise-induced myocardial ischemia. The AQRS shifted from 58 ± 17° at rest to -66 ± 11° during exercise (p<0.001). The intraventricular conduction time at rest was 86 ± 4 ms and increased to only 90 ± 4 ms during left anterior hemiblock. Our observations suggest that the intraventricular conduction time is not always prolonged during left anterior hemiblock, particularly if this conduction abnormality is acute.

Original languageEnglish (US)
Pages (from-to)1144-1146
Number of pages3
JournalAviation Space and Environmental Medicine
Issue number10
StatePublished - 1980
Externally publishedYes

ASJC Scopus subject areas

  • Public Health, Environmental and Occupational Health


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