Question

When is the risk of post-myocardial infarction papillary muscle rupture the highest?

A) Immediately during the infarct
B) 24-72 hours after the infarct
C) 1 week after the infarct
D) 2-4 weeks after the infarct

Answer 1

The risk of post-myocardial infarction papillary muscle rupture is highest 2-4 weeks after the infarct. This corresponds to the period when the concentration of LDH₁ isoenzyme form of lactate dehydrogenase in the plasma is at peak levels. CPK, another enzyme used to indicate heart attack, is also maintained at a higher level in the plasma for 1-2 days after the infarct.D) 2-4 weeks after the infarct

Step-by-step explanation:

The risk of post-myocardial infarction papillary muscle rupture is highest 2-4 weeks after the infarct. During this time, the concentration of LDH₁ isoenzyme form of lactate dehydrogenase in the plasma is at peak levels, which indicates the period of highest risk. The concentration of CPK, another enzyme used to indicate heart attack, is also maintained at a higher level in the plasma for 1-2 days after the infarct.