Calcium Channel Blockers Are Useful in Treating Certain Cardiac Arrhythmias

question 5

Multiple Choice

Calcium channel blockers are useful in treating certain cardiac arrhythmias because they

• A) decrease the rate of discharge of the SA node
• B) increase conduction velocity through the AV node
• C) block the effects of catecholamines (epinephrine, norepinephrine) on cardiac tissues
• D) inhibit the ability of sodium to excite cardiac membranes
• E) none of the above are true; calcium channel blockers are not used to treat arrhythmias

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Definitions:

Pre-Start-Up Inspection

A systematic review conducted on machinery or systems before they are started, ensuring safety, compliance, and functionality.

Field Checkout

The process of verifying and testing equipment and systems at the job site to ensure proper operation according to design specifications.

Commissioning

The process of verifying and checking that a new or modified system performs according to its design specifications and requirements before full operation.

I/O Module

A plug-in assembly, containing two or more identical input or output circuits, that contain the connections between a processor and connected devices.