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AHS 177 > Section 4 > Flashcards

Section 4 Flashcards

1
Q

Cardiac Output

A

amount of blood, in liters, the heart pumps each minute

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2
Q

Stroke Volume

A

amount of blood pumped with each heartbeat

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3
Q

cardiac output per minute

A

stroke volume multiplied by number of beats per minute

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4
Q

intrinsic rate

A

normal firing rate associated with the electrical system (bpm)

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5
Q

sinoatrial node

A

sa node, primary pacemaker, with an intrinsic rate of 60-100 bpm

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6
Q

atrioventricular node

A

av node, intrinsic rate of 40-50 bpm

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7
Q

bundle of his

A

AV bundle, intrinsic rate of 40-50 bpm

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8
Q

bundle branches

A

carry electrical impulse to the ventricular walls

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9
Q

purkinje fibers

A

divide from bundle branches, intrinsic rate of 20-40bpm

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10
Q

segment

A

area between two waves

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11
Q

interval

A

a wave and a segment

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12
Q

complex

A

several waves

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13
Q

P wave

A

first positive deflection, depolarization of atrium

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14
Q

QRS Complex

A

depolarization of ventricles

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15
Q

T wave

A

Repolarization of ventricles

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16
Q

PR Interval

A

0.12-0.20 s

17
Q

QRS Interval

A

<0.12s

18
Q

R-R Interval

A

should be uniform

19
Q

ST Segment

A

should remain at baseline

20
Q

one small block is

A

0.04s

21
Q

one large block is

A

0.20s

22
Q

five large blocks is

A

1 second

23
Q

heart rhythm

A

overall pattern of the heartbeat

24
Q

heart rate

A

speed at which the heart is beating

25
Q

three methods to determine heart rate

A

six-second method, little block method, big block method

26
Q

six-second method

A

count QRS complexes and multiply by 10

27
Q

Large block method

A

count the large blocks between the R-R intervals and divide into 300
300 method

28
Q

300 method

A

Large block method

29
Q

small block method

A

count small blocks between R-R intervals and divide into 1500
1500 method

30
Q

regular heart rhythm

A

waves are uniform and consistent

31
Q

Irregular rhythm

A

waves are misshapen and look different from one another

32
Q

regularly irregular

A

don’t look alike but appear in clear repetitive patterns

33
Q

artifact

A

interference with the recording

34
Q

somatic tremor

A

fine, choppy distortion; caused by shivering

35
Q

wandering baseline

A

isoelectric line goes off course, caused by poor connection in electrodes or muscle movement

36
Q

electrical interference

A

alternating current (AC) interference, 60-cycle interference; caused by other electrical appliances

37
Q

broken recording

A

interrupted baseline; stylus moves back and forth trying to obtain signal

38
Q

posterior leads

A

V4, V5 & V6 convert to V7, V8 & V9 when placed posteriorally

AHS 177 (1 decks)

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