Questions: Myocardial ischemia is usually caused by which of the following? Excess fluid around the heart Atherosclerosis of coronary arteries Vagal nerve excitation

Myocardial ischemia is usually caused by which of the following? Excess fluid around the heart Atherosclerosis of coronary arteries Vagal nerve excitation
Transcript text: Myocardial ischemia is usually caused by which of the following? Excess fluid around the heart Atherosclerosis of coronary arteries Vagal nerve excitation
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Solution

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The answer is the second one: Atherosclerosis of coronary arteries.

Explanation for each option:

  1. Excess fluid around the heart: This condition is known as pericardial effusion, which can lead to cardiac tamponade, but it is not the primary cause of myocardial ischemia.
  2. Atherosclerosis of coronary arteries: This is the correct answer. Atherosclerosis involves the buildup of plaques in the coronary arteries, which can restrict blood flow to the heart muscle, leading to myocardial ischemia.
  3. Vagal nerve excitation: While vagal nerve excitation can affect heart rate and other cardiac functions, it is not a direct cause of myocardial ischemia.

Summary: Myocardial ischemia is usually caused by atherosclerosis of the coronary arteries, which restricts blood flow to the heart muscle.

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