Question

39 of 50
the nurse has just completed education on myocardial infarction (mi) to a group of new nurses. which statement made by one of the nurses indicates that the teaching has been effective?
rationale, strategy, tip
rationale strategy reference label
answer options
1 \chest pain is caused by tissue hypoxia in the myocardium.\
2 \chest pain is caused by tissue hypoxia in the vessels of the heart.\
3 \chest pain is caused by tissue hypoxia in the parietal pericardium.\
4 \chest pain is caused by tissue hypoxia in the visceral pericardium.\
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Explanation:

To determine the correct answer, we analyze the pathophysiology of myocardial infarction (MI). In MI, the myocardium (heart muscle) experiences ischemia due to reduced blood flow, leading to tissue hypoxia (lack of oxygen) in the myocardium. Let's evaluate each option:

• Option 1: States chest pain is due to tissue hypoxia in the myocardium. This aligns with the pathophysiology of MI, as the myocardium is the heart muscle affected by reduced blood supply during MI.
• Option 2: The "vessels of the heart" (like coronary arteries) can have issues, but the hypoxia causing chest pain in MI is in the myocardium (the muscle), not the vessels themselves. The vessels' problem (e.g., blockage) leads to myocardium hypoxia.
• Option 3: The parietal pericardium is the outer layer of the pericardium (sac around the heart). Hypoxia here is not related to MI, which affects the heart muscle.
• Option 4: The visceral pericardium is the inner layer of the pericardium. Hypoxia in this layer is not the cause of MI - related chest pain, which is due to myocardium hypoxia.

Answer:

1. "Chest pain is caused by tissue hypoxia in the myocardium."