NHA MA module quiz 9

Which of the following waves represents atrial depolarization?

P wave

A medical assistant notices frequent, regular spikes on the EKG tracing. Which of the following actions should the assistant take?

Turn off nearby electrical equipment

Which of the following dysrhythmias results in continuous fibrillatory waves between the QRS complexes?

atrial fibrillation

Which of the following places should the black limb lead be placed?

left arm

Which of the following serves as a conductor of impulses during an EKG?

electrolyte gel

While preparing to record an EKG, you notice there's a break in the baseline and the screen displays flat lines across all leads. Which of the following do you suspect?

There is a disconnected lead wire

Which of the following statements made by a medical assistant demonstrates an understanding of patient privacy?

"I'll cover your abdomen with a blanket as soon as I'm done placing the EKG electrodes."

Which of the following places should the electrode for lead V2 be placed?

Left side of sternum, fourth intercostal space

Which of the following differentiates sinus tachycardia from ventricular tachycardia?

Sinus tachycardia has narrow QRS complexes

Which of the following artifacts is a result of patient movement with breathing?

Wandering baseline

Which of the following is the height of a standard calibration box?

10mm

Which of the following places should the electrode for lead V4 be placed?

Left side of the sternum to the fifth intercostal space midclavicular line

Which of the following is the duration of a standard calibration box?

0.2 seconds

A medical assistant is preparing to record an EKG on a patient who has a history of pulmonary disease. The patient reports shortness of breath after lying on the exam table. Which of the following actions should the medical assistant take?

Elevate head of the bed to 45 degrees

While assisting with a cardiac stress test, the medical assistant observes the patient's blood pressure reading is 204/108. Which of the following actions should the assistant take?

Stop the procedure and notify the provider

Which of the following is the correct number of electrodes needed to record a 12-lead EKG?

10

Which of the following actions should be taken for a patient experiencing a somatic tremor artifact on their electrocardiogram due to uncontrolled muscle movements?

Have the patient lay their hands palms down under their buttocks to reduce the muscle movements

Which of the following positions is best for performing an EKG?

supine

Which of the following demonstrates how somatic tremors can differentiate from 60-cycle interference?

Somatic tremors produce irregular spikes

Which of the following actions can cause a wandering baseline artifact?

A patient with lotion or cream on their skin