How many days does it take for AST to return to normal after AMI?

After an acute myocardial infarction (AMI), aspartate aminotransferase (AST) levels typically rise and can remain elevated due to myocardial injury. Understanding the timeline of how AST levels return to normal is important, as this can provide insight into the patient’s recovery and the extent of muscle damage.

The correct answer indicates that it takes approximately 4 to 6 days for AST levels to return to baseline after an AMI. This timeframe aligns with the peak of AST elevation, which usually occurs within 24 to 48 hours post-infarction, and the subsequent decline back to normal levels.

This detail is significant in clinical practice as monitoring AST along with other cardiac markers helps assess the resolution of myocardial necrosis and the overall management of the patient following an AMI. The other options suggest shorter or longer recovery times, which do not accurately reflect the typical biochemical behavior of AST after an acute cardiac event.