CRAT Antiarrhythmic Medications and Clinical Interventions 2

Question 1

Synchronized cardioversion is indicated for which of the following rhythms?

Accepted Answer

Unstable supraventricular tachycardia with a pulse

Answer

Synchronized cardioversion delivers a shock timed to the R wave and is used for unstable tachyarrhythmias with a pulse, avoiding accidental delivery during the T wave.

Question 2

What is the primary purpose of the 'synchronized' mode during cardioversion?

Accepted Answer

To prevent shock delivery during the vulnerable T wave period

Answer

Synchronization ensures the shock is delivered on the R wave rather than the T wave, preventing the R-on-T phenomenon that could trigger ventricular fibrillation.

Question 3

Beta-blockers used as antiarrhythmics belong to which Vaughan Williams class?

Accepted Answer

Class II

Answer

Beta-blockers are Class II antiarrhythmics that reduce heart rate and AV nodal conduction by blocking beta-adrenergic receptors.

Question 4

Digoxin toxicity can cause which ECG changes?

Accepted Answer

Scooped ST depression and bradyarrhythmias

Answer

Digoxin toxicity classically causes scooped or 'Salvador Dali mustache' ST depression, bradyarrhythmias, and various AV blocks.

Question 5

Transcutaneous pacing is indicated as an emergency intervention for:

Accepted Answer

Symptomatic bradycardia refractory to atropine

Answer

Transcutaneous pacing provides temporary electrical stimulation of the heart and is used for symptomatic bradycardia when atropine is ineffective.

CRAT - Certified Rhythm Analysis Technician Practice Test

CRAT - Certified Rhythm Analysis Technician Practice Test

CRAT Antiarrhythmic Medications and Clinical Interventions 2