The Q, R, and S waves together represent contraction of?

• Atrium and Ventricles

• Ventricles

• Atrium

• Ventricles and P. Fibers

A medical assistant is preparing a patient for an EKG. In which of the following locations should the assistant place the V4 lead?

• 5th intercostal space at the anterior axillary line

• 5th intercostal space at the midaxillary line

• Midway between V3 and V5

• 5th intercostal space at the midclavicular line

Which is the first group of leads to be recorded on an electrocardiogram?

• Augmented leads

• Leads I, II, and III

• aVR, aVL, and aVF

• Leads V1 thru V6

If a medical assistant is placing the electrodes on a patient that had a status post left-sided mastectomy, where should the MA place the V2 lead?

• Right arm

• Left Chest

• Left arm

• Right Chest

If a medical assistant is placing the electrodes on a patient that has a below the elbow amputation of the right arm, where would the MA place the RA lead?

• Left chest

• In the axillary

• Right deltoid

• Left deltoid

Which electrode is placed on the 4th intercostal space of the left sternal border?

• V1

• V2

• V3

• V6

When performing a 12 lead EKG on a patient, which lead is used as a ground to help decrease interference?

• LA

• LL

• RA

• RL

Which anatomical landmark is the location for the V6 lead?

• Midaxillary Line

• Midclavicular Line

• 5th intercostal space

• 4th intercostal space

The body’s deoxygenated blood enters the right atrium via which blood vessel?

• Aorta

• Inferior & Superior Vena Cava

• Pulmonary artery

• Pulmonary Vein

A narrowing of the valve between the left atrium and left ventricle is the narrowing of what valve?

• Tricuspid Valve

• Pulmonary Valve

• Mitral Valve

• Aortic Valve