EKG review !

Question 1

the interval from the peak of one QRS complex to the next. It’s used as an indicator of regularity when evaluating the heart’s rhythm on an EKG

Answer 1

R-R interval

Question 2

portion on the EKG wave from the end of the P wave to the beginning of the QRS complex, lasting about 0.1 secs.

Answer 2

PR interval

Question 3

a cluster of special muscle fibers located in the right atrial wall of heart considered to be the primary pacemaker of the heart.

Answer 3

SA node

Question 4

change of the electrical polarity of a membrane because of flow or iron in and out of the cell across the cell membranes.

Answer 4

depolarization.

Question 5

the restoration of electrical polarity via an increase in iron differential between cell membranes of the myocardium

Answer 5

repolarization

Question 6

the electrical sensors placed on the chest to record the bioelectrical activity of the heart.

Answer 6

electrode

Question 7

specialized heart conducting tissue that receives impulses from the SA node and propagates them to the ventricles

Answer 7

AV node

(atrioventricular)

Question 8

EKG representation of the heart’s electrical impulse as it passes through ventricles.

Answer 8

QRS complex

Question 9

a single-led EKG recording used to evaluate the pt.’s rhythm.

Answer 9

rhythm strip

Question 10

corresponds to rapid ventricular repolarization

Answer 10

T wave

Question 11

the normal cycle of electrical stimulation of the heart that begins in the SA node, traveling to the left atrium and down to the AV node

Answer 11

sinus rhythm

Question 12

pertaining to the heart

Answer 12

cardio

Question 13

toward the midline of the body

Answer 13

medial

Question 14

front of the body

Answer 14

anterior

Question 15

the two lower chambers of the heart

Answer 15

ventricles

Question 16

back of the body

Answer 16

posterior

Question 17

outermost layer of the heart; thin layer of connective tissue and fat and containers the coronary arteries

Answer 17

epicardium

Question 18

pertaining to blood vessels

Answer 18

vascular

Question 19

divides the right and left chambers of the heart

Answer 19

septum

Question 20

atria

Answer 20

upper chambers of the heart

Question 21

difference in electrical charge on either side of a cell membrane for myocardial cells

Answer 21

action potential

Question 22

movement of molecules from an area of higher concentration to an area of lower concentration

Answer 22

diffusion

Question 23

when the atria and ventricles contract

Answer 23

systole

Question 24

when the ventricles and atria relax

Answer 24

diastole

Question 25

pulmonary circut

Answer 25

refers to the blood circulation between the heart and lungs

Question 26

systemic circut

Answer 26

refers to the blood circulation between the heart and the body

Question 27

regurgitation

Answer 27

blood leaks back into the chamber it came from

Question 28

depolarization

Answer 28

change in electrical charge from negative to positive -- contraction

Question 29

repolarization

Answer 29

change in electrical charge from positive to negative -- relaxing

Question 30

bigeminy

Answer 30

every other beat

Question 31

trigeminy

Answer 31

every third beat

Question 32

unifocal

Answer 32

all PVC's on an EKG are identical in appearance

Question 33

multifocal

Answer 33

the PVC's are different on the tracing

Question 34

what is the normal measurement of the QRS complex?

Answer 34

<0.12 seconds

Question 35

what happens if the R-R intervals are not evenly spaced out?

Answer 35

irregular rhythm

Question 36

You are watching the monitor at the nurse's desk and notice a client's rhythm turns from normal sinus rhythm to this rhythm (mostly flat line). What should you do?

Answer 36

check leads and the client

Question 37

you are working in the ICU and you are assessing your client when all of a sudden they become unresponsive, but they have an organized rhythm on the monitor. what is your priority?

Answer 37

check for pulse

Question 38

an EKG is actually

Answer 38

a graph

Question 39

which of the following is not a direct indicator of a person's cardiac health?

Answer 39

temperature

Question 40

the place where the electrical current starts and is considered the heart's pacemaker:

Answer 40

sino-atrial node

Question 41

in terms of electrical activity and EKGs no energy refers to....

Answer 41

baseline (isoelectric line)

Question 42

the EKG has small pads for conductivity called?

Answer 42

electrodes

Question 43

average heart rate is?

Answer 43

60 - 100 bpm

Question 44

universal standard for ordering an EKG is at a speed of?

Answer 44

25 mm / second