Certified Nurses Operating Room (CNOR) Practice Exam

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Prepare for the Certified Nurses Operating Room Test. Utilize flashcards and multiple choice questions; each accompanied by hints and in-depth explanations. Ace your exam with confidence!

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What is the implication of a calcium channel block in the context of arrhythmia treatment for MH?

It is safe to use.
It can worsen arrhythmias.
It is the first line of treatment.
It does not affect arrhythmias.

The correct answer is: It can worsen arrhythmias.

The implication of calcium channel blockade in the context of treating arrhythmias, particularly when considering malignant hyperthermia (MH), is significant. Calcium channel blockers can actually worsen certain types of arrhythmias by affecting the excitability and conduction within the heart muscle. In cases of MH, where the body's response to certain anesthetic agents can lead to a life-threatening hypermetabolic state, managing the resulting arrhythmias becomes crucial. Since calcium plays a vital role in cardiac conduction and muscle contraction, a blockade can lead to increased risks of more severe or persistent arrhythmias rather than alleviating them. A thorough understanding of the physiological effects of medications on the heart is essential for managing patients who may be experiencing serious complications like MH, which is why this treatment option is handled cautiously and not recommended as a safe or first-line approach.