ECG

Question 1

cardiac cycle

Answer 1

sequence of events that occur during one complete heartbeat

Question 2

ECG

Answer 2

graphic recording of electrical potentials produced by heart muscle during different phases of cardiac cycle

Question 3

diastole

Answer 3

relaxation of the heart, occurs prior to and during the filling of chambers

Question 4

systole

Answer 4

contraction of the heart

Question 5

arrythmia

Answer 5

abnormal heartbeat

Question 6

interval

Answer 6

length of a wave w/ or w/o a segment.

Question 7

beginning of one wave to the beginning or end of another

Answer 7

interval

Question 8

segment

Answer 8

portion of ECGs between two waves

Question 9

positive deflection

Answer 9

wave above the baseline

Question 10

negative deflection

Answer 10

wave below the baseline

Question 11

polarization

Answer 11

stage when heart is at rest

Question 12

depolarization

Answer 12

heart muscle contraction in response to electical stimulus

Question 13

what occurs when electrolytes move across the cell membrane-Na/K pump

Answer 13

depolarization

Question 14

repolarization

Answer 14

heart muscle relaxation occurs when the electrolytes move back across the cell membrane

Question 15

what makes the cell ready for the next electrical impulse

Answer 15

repolarization

Question 16

sinoatrial node AKAs

Answer 16

SA node and pacemaker

Question 17

Right AV valve

Answer 17

Tricuspid valve

Question 18

Left AV valve

Answer 18

mitral valve

Question 19

left heart

Answer 19

left atrium/ventricle, mitral valve, aorta, pulmonary vein

Question 20

right heart

Answer 20

right atrium/ventricle, tricuspid valve, caudal/cranial vena cava, pulmonary artery

Question 21

LUB produced when

Answer 21

closure of AV valve at the time of contraction of the muscle fibers of the ventricles

Question 22

DUB produced when

Answer 22

vibrations of the vessel walls, blood column, and closing of semilunar valves

Question 23

automaticity

Answer 23

property that allows a cell to reach its threshold potential spontaneously

Question 24

excitability

Answer 24

property that describes the ease with which a cell can become depolarized

Question 25

all or nothing rule goes with what property

Answer 25

excitability

Question 26

refractoriness

Answer 26

the heart muscle will not respond to external stimuli during its period of contraction

Question 27

conductivity

Answer 27

property that allows electrical current to travel from one part of the heart to another

Question 28

we have the most concern with what property during ECG

Answer 28

contractility

Question 29

contractility.. best measured by

Answer 29

ocurs in response to electrical current, best measured by echocardiogram

Question 30

measures electrical activity

Answer 30

ECG

Question 31

how forceful the contraction is

Answer 31

echocardiogram

Question 32

What only measures the stimulus for contraction, not the contraction itself

Answer 32

ECG

Question 33

what is the tool of choice for assessing contractility

Answer 33

echocardiography

Question 34

circulation from heart to lungs have what kind of pressure

Answer 34

low pressure

Question 35

circulation from the lungs into the pulmonary vein (passes through body) has what kind of pressure

Answer 35

high pressure

Question 36

unoxygenated blood in which circulation

Answer 36

pulmonary circulation

Question 37

oxygenated blood in which circulation

Answer 37

systemic circulation

Question 38

how are the electrical impulses transmitted through the heart: sequence

Answer 38

SA node, AV node, Bundle of His, Purkinje fibers

Question 39

what wave corresponds to atrial depolarization/contraction

Answer 39

P wave

Question 40

begins at end of p wave and ends with QRS complex

Answer 40

PR segment

Question 41

the PR segment should be

Answer 41

flat. baseline.

Question 42

what wave represents ventricular depolarization/contraction

Answer 42

QRS waves

Question 43

largest waveform of an EKG

Answer 43

QRS

Question 44

what wave represents ventricular repolarization or relaxation

Answer 44

T wave

Question 45

what waves can be pos, neg, and biphasic

Answer 45

P and T wave

Question 46

the impulse originates where

Answer 46

SA node

Question 47

what gel is preferred to assure good contact with skin

Answer 47

acoustic

Question 48

what restraint will the pt be in during ECG

Answer 48

right lateral recumbency

Question 49

what to note about ECG

Answer 49

pt. name, position, date

Question 50

a complete ECG consists of a: (seconds and mm/sec)

Answer 50

30-60 second (12") at 50 mm/sec of all leads or 25 mm/sec

Question 51

25 mm/sec vs 50 mm/sec

Answer 51

25- slower measurement | 50- faster measurement

Question 52

lead systems allow you to

Answer 52

look at the heart from different angles (direction of electrical activity)

Question 53

each lead has what attached to the surface of the skin

Answer 53

pos and neg pole

Question 54

upward deflection vs downward deflection

Answer 54

produced when electrical impulses travel towards a pos/neg electrode

Question 55

is an isoelectric line pos, neg, or biphasic

Answer 55

biphasic

Question 56

isoelectric line is produced when there is

Answer 56

no electrical spread through the heart, or equal forces.

Question 57

if the QRS goes off the paper... do what to sensitivity

Answer 57

decrease it by 1/2 cm

Question 58

what 3 sensitivity readings are used to adjust wheel on paper

Answer 58

1/2, 1, 2

Question 59

increase what is an arrhythmia is seen

Answer 59

increase the length of the tracing

Question 60

should R waves be pos/neg on lead 1

Answer 60

positive

Question 61

standard settings for veterinary applications

Answer 61

50 mm/sec and 1 cm (sensitivity)

Question 62

determine HR by two methods

Answer 62

ECG ruler and counting the R-R intervals and 20x

Question 63

norm BP dog/cat

Answer 63

dog- 70-220 bpm | cat- 120-240 bpm