Key result
AMI with bifascicular or trifascicular block carries ~49% 1-year mortality, driven by pump failure.
Why the study?
The prognostic implications of bifascicular and trifascicular intraventricular conduction disturbances in myocardial infarction were not well characterized.
Observational (n=69)
No
High mortality from pump failure in AMI with bifascicular/trifascicular block warrants close monitoring; leaves open whether pacing or other interventions improve survival.
An analysis of 69 cases of bifascicular and trifascicular types of intraventricular conduction disturbances in myocardial infarction is presented. Complications, caused of death and the follow-up of unpaced cases for a year have been recorded. Pump failure and severe degrees of blocks with consequent ventricular asystole are the important caused of death. Recurrent pump failure with occasional outcome is more common in cases with RBBB and LAH than in other types of blocks.
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Rao et al. (1977) conducted an observational in Acute myocardial infarction with bifascicular or trifascicular block (n=69). Bifascicular and trifascicular blocks was evaluated on 1-year mortality. In patients with acute myocardial infarction complicated by bifascicular or trifascicular blocks, the 1-year mortality rate was 49.3% (34 of 69 cases), primarily due to pump failure and severe AV block.
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