EKG Basics

How many electrodes are used in a 12 lead EKG?

• 10

• 8

• 12

• 6

How many precordial leads are there?

• 4

• 6

• 10

• 8

The nurse is assessing the client’s electrocardiography (ECG). What does the P wave on the ECG tracing represent?

• Contraction of the atria

• Contraction of the ventricles

• Depolarization of the atria

• Depolarization of the ventricles

The nurse is reviewing a patient’s electrocardiogram. Which wave should the nurse recognize as being the first positive wave in a normal cardiac cycle?

• P wave

• Q wave

• R wave

• S wave

A patient is experiencing electrocardiogram changes. Which wave should the nurse recognize as representing ventricular repolarization?

• Q wave

• R wave

• S wave

• T wave

A patient is admitted for diagnosis of an electrocardiogram abnormality. Which wave should the nurse plan care based upon changes in the patient’s ventricular depolarization?

• P wave

• QRS complex

• U wave

• T wave

What do the letters EKG stand for?

• Electrocardiograph
• Electromagneticgraph
• Electrocardiogram 
• Electrolytes

Carries blood to the lungs for oxygenation: 

• Pulmonary Circulation
• Systemic Circulation 

Identify this rhythm

• Sinus bradycardia

• 1 degree heart block

• Normal Sinus Rhythm

• 2nd Degree Type I heart block

Another name for Leads aVF, aVL, aVR is:

• Stand lead.

• Bipolar lead.

• Both A and B.

• Augmented leads.