Normal Sinus Rhythm Overview
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Questions and Answers

Which of the following Class I agents lengthens the action potential?

  • Ic
  • Ia (correct)
  • Ib
  • Id
  • What is the preferred method for rhythm control in AFib?

  • Digoxin
  • Beta-blockers
  • Direct current cardioversion (correct)
  • Non-DHP CCBs
  • Which Class Ib agent can be used for acute termination of VT if unresponsive to procainamide or amiodarone?

  • Quinidine
  • Mexiletine
  • Lidocaine (correct)
  • Procainamide
  • Which of the following medications is not recommended for maintaining sinus rhythm in AFib?

    <p>Digoxin</p> Signup and view all the answers

    Which Class Ia agent has been used in patients with Brugada syndrome?

    <p>Quinidine</p> Signup and view all the answers

    Which Class Ic agent can be used in SVT caused by AVNRT?

    <p>Propafenone</p> Signup and view all the answers

    What is the normal heart rate range in Beats Per Minute (BPM)?

    <p>60 to 100 BPM</p> Signup and view all the answers

    Where does the electrical impulse begin in a normal sinus rhythm?

    <p>SA node</p> Signup and view all the answers

    In a normal heart rhythm, what happens when the signal reaches the AV node?

    <p>Electrical conduction slows down</p> Signup and view all the answers

    What is the phase where rapid ventricular repolarization occurs in response to an efflux of K?

    <p>Phase 3</p> Signup and view all the answers

    Some arrhythmias may be asymptomatic and only detected during what?

    <p>A medical exam</p> Signup and view all the answers

    What is the primary function of the sinoatrial (SA) node?

    <p>To act as the heart's natural pacemaker</p> Signup and view all the answers

    A patient with a regular rhythm and bradycardia presents to the ED. Which is the best treatment?

    <p>Administer atropine 0.5 mg intravenously</p> Signup and view all the answers

    What is the first step of treatment for a patient experiencing polymorphic ventricular tachycardia (VT) with a stable TG?

    <p>Immediate direct current cardioversion (DCC)</p> Signup and view all the answers

    Which of the following is NOT a recommended therapy for rate control in patients with atrial fibrillation?

    <p>Amiodarone</p> Signup and view all the answers

    After cardioversion and 4 weeks of anticoagulation, which of the following is an appropriate therapy to prevent thromboembolic complications in a patient with atrial fibrillation?

    <p>Warfarin with INR goal of 2-3</p> Signup and view all the answers

    What is the goal of rate control in patients with atrial fibrillation?

    <p>Controlling ventricular rate</p> Signup and view all the answers

    In managing atrial fibrillation, what is the primary difference between rate control and rhythm control?

    <p>Rate control focuses on controlling ventricular rate, while rhythm control focuses on restoring sinus rhythm</p> Signup and view all the answers

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