Section 4

Question 1

Cardiac Output

Answer 1

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

Question 2

Stroke Volume

Answer 2

amount of blood pumped with each heartbeat

Question 3

cardiac output per minute

Answer 3

stroke volume multiplied by number of beats per minute

Question 4

intrinsic rate

Answer 4

normal firing rate associated with the electrical system (bpm)

Question 5

sinoatrial node

Answer 5

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

Question 6

atrioventricular node

Answer 6

av node, intrinsic rate of 40-50 bpm

Question 7

bundle of his

Answer 7

AV bundle, intrinsic rate of 40-50 bpm

Question 8

bundle branches

Answer 8

carry electrical impulse to the ventricular walls

Question 9

purkinje fibers

Answer 9

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

Question 10

segment

Answer 10

area between two waves

Question 11

interval

Answer 11

a wave and a segment

Question 12

complex

Answer 12

several waves

Question 13

P wave

Answer 13

first positive deflection, depolarization of atrium

Question 14

QRS Complex

Answer 14

depolarization of ventricles

Question 15

T wave

Answer 15

Repolarization of ventricles

Question 16

PR Interval

Answer 16

0.12-0.20 s

Question 17

QRS Interval

Answer 17

<0.12s

Question 18

R-R Interval

Answer 18

should be uniform

Question 19

ST Segment

Answer 19

should remain at baseline

Question 20

one small block is

Answer 20

0.04s

Question 21

one large block is

Answer 21

0.20s

Question 22

five large blocks is

Answer 22

1 second

Question 23

heart rhythm

Answer 23

overall pattern of the heartbeat

Question 24

heart rate

Answer 24

speed at which the heart is beating

Question 25

three methods to determine heart rate

Answer 25

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

Question 26

six-second method

Answer 26

count QRS complexes and multiply by 10

Question 27

Large block method

Answer 27

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

Question 28

300 method

Answer 28

Large block method

Question 29

small block method

Answer 29

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

Question 30

regular heart rhythm

Answer 30

waves are uniform and consistent

Question 31

Irregular rhythm

Answer 31

waves are misshapen and look different from one another

Question 32

regularly irregular

Answer 32

don't look alike but appear in clear repetitive patterns

Question 33

artifact

Answer 33

interference with the recording

Question 34

somatic tremor

Answer 34

fine, choppy distortion; caused by shivering

Question 35

wandering baseline

Answer 35

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

Question 36

electrical interference

Answer 36

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

Question 37

broken recording

Answer 37

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

Question 38

posterior leads

Answer 38

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