A patient has a known history of coronary artery disease in the LAD artery. What are the 4 main ways that an infarction can occur to the cardiac muscle that is vascularized by this... A patient has a known history of coronary artery disease in the LAD artery. What are the 4 main ways that an infarction can occur to the cardiac muscle that is vascularized by this artery? Place a ‘*’ by the mechanism that is the most common cause of acute MI.
Understand the Problem
The question is asking about the four main mechanisms by which an infarction can occur in the cardiac muscle supplied by the LAD artery, with a specific emphasis on identifying the most common cause of acute myocardial infarction.
Answer
Plaque rupture with thrombus formation*, plaque erosion, calcified nodule, coronary spasm.
The four main ways that an infarction can occur to the cardiac muscle vascularized by the LAD artery are: plaque rupture with thrombus formation*, plaque erosion, calcified nodule, and coronary spasm. The most common cause of acute myocardial infarction (MI) is plaque rupture with thrombus formation.
Answer for screen readers
The four main ways that an infarction can occur to the cardiac muscle vascularized by the LAD artery are: plaque rupture with thrombus formation*, plaque erosion, calcified nodule, and coronary spasm. The most common cause of acute myocardial infarction (MI) is plaque rupture with thrombus formation.
More Information
The LAD artery is commonly associated with severe heart attacks known as 'widowmakers' due to its critical role in supplying blood to a large part of the heart. The plaque rupture is the most common cause because it leads to significant obstruction by a thrombus, cutting off blood supply.
Tips
A common mistake is assuming that coronary spasm is the most frequent cause, whereas plaque rupture is more typical.
Sources
- Myocardial Infarction - StatPearls - NCBI Bookshelf - ncbi.nlm.nih.gov
- Heart Attack | Johns Hopkins Medicine - hopkinsmedicine.org
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