Ace the EMT Challenge 2025 – Elevate Your Emergency Skills!

Question: 1 / 400

What does nitroglycerin do?

Increases heart rate

Constricts blood vessels

Dilates vessels to reduce heart's preload

Nitroglycerin primarily acts by dilating blood vessels, specifically veins, which can reduce the workload on the heart. This in turn decreases the heart's preload and oxygen demand, making it an effective treatment for angina or chest pain. Option A is incorrect because nitroglycerin does not directly affect heart rate. Option B is also incorrect as it is the opposite effect of what nitroglycerin does. Option D is incorrect as it does not decrease oxygen supply to the heart, but rather helps to improve oxygen supply by reducing the heart's workload.

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Decreases oxygen supply to the heart

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