Why the study?
What are the histopathological changes in the cardiac conduction system in patients with acute myocardial infarction complicated by heart block?
Population
60 deceased patients: 30 with acute myocardial infarction and 30 controls who died from non-cardiac disease.
Comparison
Detailed autopsy examination of the cardiac… vs Control patients who died from non-cardiac disease
Design
Case-control
Authors
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Clarifies site-specific conduction damage in AMI with block; extends histopathologic correlation but leaves open clinical translation.
What are the histopathological changes in the cardiac conduction system in patients with acute myocardial infarction complicated by heart block?
The study demonstrates that heart block in anterior AMI is typically due to bundle branch infarction, whereas in posterior AMI it is associated with AV block but rarely AV node necrosis, with His bundle electrograms correlating well with histopathology.
Lief et al. (1974) studied this question.
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