Which of the Following Is True of Class 2 Antiarrhythmic

question 24

Multiple Choice

Which of the following is true of Class 2 antiarrhythmic drugs?

• A) They tend to shorten the cardiac refractory period.
• B) They increase the excitability, conduction, and automaticity of ventricular muscle.
• C) They decrease heart rate, atrioventricular (AV) conduction, and automaticity of the sinoatrial (SA) and AV nodes.
• D) They are mainly indicated for arrhythmias that originate below the AV node.

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