CRAT Antiarrhythmic Medications and Clinical Interventions 3

Question 1

The Vaughan Williams Class IV antiarrhythmics include:

Accepted Answer

Calcium channel blockers

Answer

Sodium channel blockers

Answer

Beta-blockers

Answer

Potassium channel blockers

Question 2

Which intervention is the definitive treatment for ventricular fibrillation?

Accepted Answer

Unsynchronized defibrillation (CPR + shock)

Answer

IV amiodarone bolus

Answer

Synchronized cardioversion at 100 J

Answer

IV atropine 1 mg

Question 3

A CRAT notices a patient in sustained stable monomorphic VT. After confirming the patient is stable, the next appropriate intervention is:

Accepted Answer

Synchronized cardioversion or antiarrhythmic therapy per protocol

Answer

Immediate unsynchronized defibrillation

Answer

Vagal maneuvers

Answer

Increase IV fluids

Question 4

Procainamide's primary antiarrhythmic mechanism is:

Accepted Answer

Blocking fast sodium channels to slow conduction

Answer

Blocking potassium channels only

Answer

Blocking beta-adrenergic receptors

Answer

Blocking calcium channels in the SA node

Question 5

Which electrolyte imbalance is most likely to cause refractory ventricular arrhythmias resistant to standard treatment?

Accepted Answer

Hypomagnesemia

Answer

Hypernatremia

Answer

Hyperchloremia

Answer

Hypophosphatemia

Question 6

When documenting a rhythm requiring intervention, a CRAT should record:

Accepted Answer

The rhythm identification, time of onset, patient symptoms, interventions, and patient response

Answer

Only the time the arrhythmia resolved

Answer

Just the medication given

Answer

Only the heart rate and blood pressure