Question 1
According to the Vaughan Williams classification, mexiletine is categorized as which class of antiarrhythmic agent?
Show answer & explanation
Correct answer: C - Class Ib, which shortens the action potential
10 exam-style questions with answers and explanations, straight from our 1,035-question bank. Tap an answer to check yourself. When you're ready, take the scored version in the free practice test.
The RCES exam has 170 questions and runs 3 hours.
These 10 free RCES questions are organized by exam domain, so you can see how each part of the Registered Cardiac Electrophysiology Specialist blueprint is tested. Reveal the answer and explanation under each question.
According to the Vaughan Williams classification, mexiletine is categorized as which class of antiarrhythmic agent?
Correct answer: C - Class Ib, which shortens the action potential
Amiodarone is unusual among antiarrhythmic drugs because it:
Correct answer: D - Exhibits properties of all four Vaughan Williams classes
Adenosine is administered during an EP study to help differentiate tachycardia mechanisms. Its principal electrophysiologic effect is:
Correct answer: A - Transient block of conduction through the AV node
A pacemaker is programmed to the 'DDDR' mode. Reading the NASPE/BPEG (NBG) code, this mode indicates:
Correct answer: C - Pace and sense both chambers, dual response, plus rate modulation
A pacemaker-dependent patient is scheduled for a procedure using electrocautery. To prevent inappropriate inhibition of pacing by electrical interference, the device is MOST appropriately programmed to:
Correct answer: B - An asynchronous mode such as DOO or VOO for the case
During an EP study, a catheter records three distinct deflections in sequence: a low-amplitude atrial signal, a sharp narrow spike, and a large ventricular signal. This catheter is positioned at the:
Correct answer: C - His bundle region, across the tricuspid annulus
A candidate is reviewing baseline intervals recorded during an EP study. Which of the following values represents a NORMAL HV interval?
Correct answer: B - 45 milliseconds
During atrial extrastimulus testing, shortening the coupling interval by 10 ms produces a sudden 60 ms increase in the AH interval. This finding is BEST explained by:
Correct answer: D - Dual AV nodal pathway physiology with a slow-pathway jump
The effective refractory period (ERP) of the atrium is defined as the:
Correct answer: A - Longest premature coupling interval that fails to capture the atrium
A regular narrow-complex tachycardia is entrained by ventricular overdrive pacing. When pacing stops, the electrograms return in a 'V-A-A-V' sequence rather than 'V-A-V.' This response is MOST consistent with:
Correct answer: B - Atrial tachycardia with the AV node as a bystander
The RCES exam also covers these domains. Drill them in the full free practice test:
The full bank has 1,025 more RCES questions with explanations.
Continue in the free practice test →
View plans