EKG

Question 1

normal PR interval

Answer 1

0.12-0.2 seconds

Question 2

normal QT interval

Answer 2

0.4 - 0.43 seconds

Question 3

p wave means

Answer 3

atrial depolarization

Question 4

QRS complex means

Answer 4

ventricular depolarization, ventricular conduction

Question 5

t wave means

Answer 5

ventricular repolarization

Question 6

QT interval means

Answer 6

condition of ventricals

Question 7

one small box horizontal

Answer 7

0.04 seconds

Question 8

one large horizontal box

Answer 8

0.2 seconds

Question 9

5 large boxes

Answer 9

1 second

Question 10

normal QRS duration

Answer 10

0.06 - 0.12

Question 12

R-R interval

Answer 12

0.6-1 second

Question 13

HR calculation

Answer 13

count number of seconds between 2 R waves, divide 60/#

Question 14

delay in conduction from SA to AV node

Answer 14

PR interval too long or short

Question 15

when the AV node is the pacemaker, what will you see?

Answer 15

PR interval short, retrograde, hidden in QRS, or absent

Question 16

bundle branch defect will show

Answer 16

wide QRS

Question 17

delayed ventricular repolarization looks like

Answer 17

long QT

Question 18

unipolar leads

Answer 18

V1-V6

Question 19

limb leads

Answer 19

I, II, III, aVR, aVL, aVF

Question 20

normal axis deviation

Answer 20

-30 to 90 degrees

QRS axis deviation

Question 21

how to ensure proper lead placement

Answer 21

lead I positive, lead aVR negative

dextrocardia would be opposite

Question 22

RCA location

Answer 22

inferior

Question 23

CFX location

Answer 23

lateral

Question 24

LAD location

Answer 24

anterior

Question 25

inferior MI leads

Answer 25

II, III, aVF

Question 26

lateral MI leads

Answer 26

I, aVL, V5, V6

Question 27

anterior MI leads

Answer 27

V2, V3, V4

Question 28

septal leads

Answer 28

V1, V2

Question 29

inferolateral leads

Answer 29

II, III, aVF, V5, V6

Question 30

anterolateral leads

Answer 30

V2, V3, V4, V5, V6

Question 31

ischemia will show

Answer 31

t wave inversion

Question 32

injury will show

Answer 32

ST elevation

Question 33

infarction will show

Answer 33

Q wave (1/3 of R) infarct is not old (weeks-months) early - large, uniform, peaked T waves, then inverted T waves, then back to normal

Question 34

significant ST depression/elevation

Answer 34

one small box/1mm in 2 leads of the same area

Question 35

reciprocal changes

Answer 35

areas of ST depression opposite of ST elevation helpful in diagnosing TRUE STEMI & ID high risk complications (poor outcomes) common w inferior, anterior & lateral MIs

Question 36

how to determine axis

Answer 36

lead II should be most positive verify II positive, aVR, negative

Question 37

EKG reading steps

Answer 37

1 verify lead placement 2 determine rate & rhythm 3 determine axis 4 r wave progression 5 look for signs of ischemia, injury, or infarct