Normal Sinus Rhythm Overview

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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?

Digoxin Signup and view all the answers

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

Quinidine Signup and view all the answers

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

Propafenone Signup and view all the answers

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

60 to 100 BPM Signup and view all the answers

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

SA node Signup and view all the answers

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

Electrical conduction slows down Signup and view all the answers

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

Phase 3 Signup and view all the answers

Some arrhythmias may be asymptomatic and only detected during what?

A medical exam Signup and view all the answers

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

To act as the heart's natural pacemaker Signup and view all the answers

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

Administer atropine 0.5 mg intravenously 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?

Immediate direct current cardioversion (DCC) Signup and view all the answers

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

Amiodarone 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?

Warfarin with INR goal of 2-3 Signup and view all the answers

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

Controlling ventricular rate Signup and view all the answers

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

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