A patient with acute chest discomfort took two of his prescribed nitroglycerin tablets and is now experiencing a pounding headache. However, he tells you that he is still experiencing chest discomfort. You should suspect that:
A. his prescribed nitroglycerin has lost its potency.
B. the nitroglycerin has caused severe hypotension.
C. he has stable angina, but still requires transport.
D. he is experiencing ongoing myocardial ischemia.
Answer: D. he is experiencing ongoing myocardial ischemia.
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