Nitroglycerin possesses which of the following effects when administered to patients with suspected cardiac chest pain?
A. Vasodilation and increased myocardial oxygen supply
B. Vasodilation and decreased myocardial oxygen supply
C. Vasoconstriction and increased cardiac workload
D. Vasoconstriction and increased cardiac oxygen demand
Answer: A. Vasodilation and increased myocardial oxygen supply
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