EKG Practice

Which of the following is the result of atrial depolarization?

• T wave

• U Wave

• QRS complex

• P wave

Lateral Leads

• I, aVL, V5, V6

• II,III, aVF

• V3, V4

• V1,V2

When performing a posterior EKG, which of the following is the correct location for placement of lead V8?

• Right mid-scapular line

• Left mid-scapular line

• Right posterior axillary line

• Left posterior axillary line

What is the proper formula to calculate heart rate using the 300 method?

• Count the number of large boxes between 2 R waves and divide 300

• Count the R waves across a 6 second strip and multiply by 10

• Count the number of small boxes between 2 R waves and divide 1500

• Count the number of large boxes between 2 R waves and multiply by 300

An MA is preparing a patient for an EKG. Which of the following instructions should the MA provide?

• “Avoid food or drink for 4 hours prior to the test.”

• “Remove all clothing from the waist up.”

• “Apply moisturizer lotion to the electrode placement sites.”

• “Maintain a full bladder for the duration of the test.”

An MA is preparing to perform an EKG recording on a patient. Which of the following information is true of limb leads and electrodes?

• Limb leads are unipolar

• Leads V1 through V6 are limb leads

• Limb leads are placed on the fleshy areas of the skin

• The left leg lead wire serves as the ground

An MA is calibrating an EKG machine. Which of the following should the assistant identify as the standard speed of the recording?

• 25 mm/second

• 50mm/second

• 10mm/second

• 5mm/second

An MA notes a wandering baseline throughout an EKG tracing. Which of the following electrocardiograph issues could have resulted in this occurrence?

• The electrode pads were defective or poorly attached

• The machine was missing the grounding prong for the outlet

• The machine did not have the proper standardization settings set

• The cables tips were loose or had become separated

An MA noticed rhythmic sharp spikes throughout an EKG tracing. Which of the following artifacts is occurring?

• Wandering baseline

• Interrupted baseline

• Interference

• Somatic tremor

What is the ratio of applied leads to recorded leads for a standard EKG machine?

• 10:10

• 3:6

• 10:12

• 9:12

Tags

NGSS.HS-PS2-5