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EKG Basics

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Questions and Answers

Which part of the heart initiates the next step in the conduction system?

Purkinje Fibers

Bundle of His

AV Node

SA Node (correct)

What is the purpose of the AV Node in the conduction system?

Slows the depolarization of the atria

Initiates ventricular depolarization

Connects atria and ventricles electrically (correct)

Initiates atrial depolarization

Which part of the heart is responsible for ventricular depolarization?

Right Bundle Branch

Left Bundle Branch

Purkinje Fibers (correct)

Bundle of His

Which of the following is a characteristic of Sinus Rhythms?

P waves upright in I, II, and aVF Signup and view all the answers

What is the typical ventricular rate in Atrial Flutter?

150 bpm Signup and view all the answers

Which type of AV nodal block is characterized by a longer PR interval that eventually leads to no QRS complex?

2nd degree AV block type 1 Signup and view all the answers

What is the main characteristic of Atrial Fibrillation?

Irregularly irregular rhythm with no P waves Signup and view all the answers

According to the Rule of 300, if there are 3 big boxes between R waves, what is the heart rate in bpm?

100 Signup and view all the answers

According to the 10 Second Rule, if there are 33 beats present on an EKG, what is the heart rate in bpm?

198 Signup and view all the answers

According to the normal QRS axis definition, which range is considered a left axis deviation (LAD)?

-30° to -90° Signup and view all the answers

According to the Quadrant Approach, if the QRS complex in leads I and aVF are predominantly negative, what is the axis deviation?

Left axis deviation (LAD) Signup and view all the answers