Key result
Atrioventricular block complicated acute coronary syndrome in 7.37% of patients, most often presenting as high-grade block in inferior myocardial infarction, and spontaneously regressed in 60% of cases.
Observational (n=407)
No
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Atrioventricular block complicates approximately 7.4% of acute coronary syndromes, predominantly in inferior myocardial infarctions, and frequently regresses spontaneously without the need for permanent pacing.
Acute coronary syndrome (ACS) results from a sudden reduction in coronary blood flow and most often occurs as a result of a ruptured atheroma plaque with the formation of thrombus. This lack of irrigation can cause transient dysfunction or irreversible damage to the conduction system The site of coronary occlusion determines the site of conduction blockage. On the other hand, the conductive disorder may result from vagal hyperactivity in the first few hours of myocardial ischemia, which may induce a transient slowing of cardiac conduction. Other contributing factors may include metabolic and hydro electrolytic disturbances and the effect of treatment
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A 2020 study conducted an observational in Acute Coronary Syndrome (n=407). Acute coronary syndrome was evaluated on Prevalence of atrioventricular block. Atrioventricular block complicated acute coronary syndrome in 7.37% of patients, most often presenting as high-grade block in inferior myocardial infarction, and spontaneously regressed in 60% of cases.
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