lab 2- ekg

Question 1

speed of ekg

Answer 1

25 mm/sec

Question 2

horizontal divisions

Answer 2

1 mm apart, 1/25 sec = 0.04 sec

Question 3

heavy dark line- horizontal

Answer 3

5 little squares, 1/5 sec = 0.2 sec

Question 4

vertical divisions

Answer 4

1 mm apart, 1/10 mV= 0.1 mV

Question 5

heavy dark line- vertical

Answer 5

5 little squares, 0.5 mV

Question 6

P wave

Answer 6

atrial depolarization

Question 7

QRS

Answer 7

ventricular depolarization

Question 8

T wave

Answer 8

ventricular repolarization

Question 9

arrhythmia/dysrhythmia

Answer 9

if either the shape, rate, pattern or absence of the waves is abnormal

Question 10

time/rate

Answer 10

measured on horizontal line

Question 11

amplitude/voltage

Answer 11

measured on vertical line

Question 12

PR interval

Answer 12

beginning of P to start of Q, 0.12-0.20 sec

Question 13

QRS interval

Answer 13

beginning of Q to end of S, 0.11 sec or less

Question 14

ST segment

Answer 14

end of S to beginning of T

Question 15

QT interval

Answer 15

beginning of Q to end of T

Question 16

6 second method

Answer 16

count Rs X 10

Question 17

R to R method

Answer 17

count little squares between two Rs, multiply by 0.04 then divide by 60

Question 18

300 150 100

Answer 18

find R on dark line, count big boxes until next one. if in between must give range

Question 19

ST interval

Answer 19

end of S to end of T

Question 20

RA

Answer 20

white-always negative

Question 21

LA

Answer 21

black- switches

Question 22

LL

Answer 22

red- always positive

Question 23

RL

Answer 23

green

Question 24

artifact

Answer 24

caused by electrical depolarizations of muscular contractions

Question 25

valsalva maneuver

Answer 25

attempting forcible expiration while glottis is closed

Question 26

neurologically- why does HR increase while doing exercise?

Answer 26

symp NS

Question 27

during sinus arrhythmia

Answer 27

HR increases during inspiration

HR decreases during expiration