CVS Practice Test 2025 – The All-In-One Guide to Exam Success!

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Question: 1 / 400

Low levels of which ion can lead to cardiac dysrhythmias?

Sodium

Calcium

Low levels of calcium can indeed lead to cardiac dysrhythmias, primarily due to calcium's essential role in cardiac muscle contraction and electrical conduction within the heart. Calcium ions facilitate the contraction of cardiac myocytes and are critical for the generation and propagation of electrical impulses. Insufficient calcium levels can disrupt the normal electrical signals, potentially resulting in arrhythmias, such as bradycardia or tachycardia. Therefore, maintaining appropriate calcium levels is vital for stable heart rhythm and overall cardiovascular health.

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Potassium

Magnesium

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