EKG Basics

What is the main vector of atrial depolarization in an EKG?

• Upward and rightward towards the SA node

• Downward and leftward towards the AV node

• Downward and rightward towards the ventricles

• Upward and leftward towards the atria

What is the function of the SA node in an EKG?

• To slow down the conduction of electrical activity

• To generate action potentials

• To repolarize the atria

• To repolarize the ventricles

What does a downward deflection in an EKG indicate?

• Positive charges moving towards the positive electrode

• Negative charges moving towards the positive electrode

• Positive charges moving away from the positive electrode

• Negative charges moving away from the positive electrode

What is the name of the lead commonly used in the rhythm strips of 12 lead EKGs?

• Lead 2

• Lead 3

• Lead 4

• Lead 1

What is the purpose of the AV node in an EKG?

• To slow down the conduction of electrical activity

• To repolarize the atria

• To repolarize the ventricles

• To generate action potentials

What does a sinus P wave indicate in an EKG?

• Atrial depolarization generated by the SA node

• Ventricular depolarization generated by the AV node

• Atrial depolarization generated by the AV node

• Ventricular depolarization generated by the SA node

What is the direction of positive charges in an EKG when they are flowing towards the positive electrode?

• Upward deflection

• Downward deflection

• No electrical activity

• Flat line

The QRS-wave correlates with which event?

• atrium contraction /signals moving from SA node to AV node

• ventricle contraction

• ventricle repolarization

• both atrial and ventricle contraction

Where is the P wave located?

• A

• B

• C

• D

• E

Tags

NGSS.HS-PS4-1

What is considered the QRS complex?

• A, B, & C

• C, D, & E

• B, C, & D

• D & E