Nursing Acceleration Challenge Exam (NACE) PN-RN Practice Test 2026 – All-in-One Resource to Excel in Your Exam!

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Which substance is typically restricted for 12 to 24 hours before a cardiac stress test?

Caffeine

Caffeine is typically restricted for 12 to 24 hours before a cardiac stress test due to its stimulatory effects on the cardiovascular system. Caffeine can increase heart rate and blood pressure, potentially interfering with the test's accuracy by provoking responses that may not reflect the patient's baseline cardiac function. By avoiding caffeine, healthcare providers can ensure that the stress test results more accurately indicate the heart's performance under exercise or stress conditions without the influence of external stimulants.

In contrast, while alcohol, beta-blockers, and aspirin may have their own considerations regarding timing and usage, they do not have the same direct and acute effects on heart rate and cardiac response as caffeine does, which is why caffeine is specifically restricted before these tests.

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Alcohol

Beta-blockers

Aspirin

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