Electrocardiogram

An ekg technician is providing instructions to a patient who is to wear a cardiac event monitor at home. which of the following statements by the patient indicates an understanding of the instructions?

"If the batteries fall, i will replace them myself."

How many leads are there on a standard electrocardiogram?

12

Which of the following terms describes an abnormality in the rhythm of the heartbeat?

Dysrhythmia

Which of the following letter denotes the chest or precordial leads?

the letter V with a number 1 through 6

Which of the following is the correct placement for V1 electrodes?

4th intercostal space, right of the sternum.

Which of the following is the correct placement for V4 electrodes?

5th intercostal space at the junction of the left midclavicular line.

An ekg technician should recognize that which of the following blood pressure readings is within the exoected reference range for an adolescent patient?

98/78

Which of the following ekg findings differentiates idioventricular rhythm from junctional rhythm?

Accelerated idioventricular rhythm has a wide QRS complex

Which term describes one complete sequence of heart contraction and relaxation?

Cardiac cycle

Which of the following terms refers to a congenital narrowing of the aortic arch?

Coarctation

True or False. Placement of the electrodes with tabs point toward the head allows for the lead wire to follow the contour of the body, reducing the tension placed on them and the likelihood of crimping.

False

Which of the following symptoms does not warrant an order for EKG?

Headache

Which of the following location is the red wire connected?

Left leg

Which of the following color is the V5 chest or precordial lead?

Orange

Which of the following are appropriate to communicate with the patient during and after theECG? Select all that apply.

Remind them they can continue to breathe normally Inform the patient to lie still and avoid moving Check if the patient is comfortable.

Which of the following locations is the white wire connected?

Right arm

Which of the following refers to the expected variations in heart rate that are caused by changes in the rate and depth of breathing?

Sinus arrhythmia

All of the following are guidelines for electrode use and maintenance, except:

Store electrodes in a refrigerator.

Which of the following refers to the expected effect that exercise has on the heart?

Tachycardia

An ekg technician is preparing to obtain a patients blood pressure reading. the patient reports jogging to the facility "to get some exercise". which of the following actions should the technician take?

The technician should have the patient sit quietly for at least 5 min before taking the patients blood pressure.

What are some common causes of ECG interference or inaccurate tracings? ( Select all that apply)

The wires/nodes/leads were not attached properly. The patient fidgeted/moved around too much. The patient was not breathing normally. There was cell phone interference.

Which of the following best describes electrocardiogram?

Used to record electrical activity of the heart.

Which of the following options is a correct chest electrode placement?

V3 electrode is placed midway between V2 and V4 on the 5th rib.

How do impulses travel directly from the SA node to the AV node?

Via the internodal pathways

Which of the following artifacts can appear as drifting away from the center on the ekg tracing?

Wandering baseline

When does atrial systole occur in the heart?

When the ventricles are contracting