EKG I

Question 1

P wave represents

Answer 1

depol of atrial contractile cells

Question 2

QRS complex represents

Answer 2

depol of ventricular contractile cells

Question 3

T wave represents

Answer 3

repol of ventricular contractile cells

Question 4

REpolarization =

Answer 4

REstores the neg charge

Question 5

(the wave’s) R side of P wave represents

Answer 5

right atrial depol

Question 6

(the wave’s) L side of P wave represents

Answer 6

left atrial depol

Question 7

PR segment represents

Answer 7

conduction pause at the AV node

Question 8

atrial repol is where on an EKG

Answer 8

not seen

Question 9

PR segment is from end of _____ to start of _____

Answer 9

end of atrial depol
->
start of ventricular depol

Question 10

PR interval is from start of _____ to start of _____

Answer 10

start of atrial depol
->
start of ventricular depol

Question 11

atrial depol occurs _____ (one word)

Answer 11

spontaneously

Question 12

part of ventricles that depol first

Answer 12

septum
-> then goes outward

Question 13

part of ventricles that repol first

Answer 13

apex
-> then goes upward

Question 14

QRS interval represents

Answer 14

the time it takes for ventricular depol

Question 15

ST segment is from end of _____ to start of _____

Answer 15

end of ventricular depol
->
start of ventricular repol

Question 16

QT interval is from start of _____ to end of _____

Answer 16

start of ventricular depol
->
end of ventricular repol

Question 17

Answer 17

depol moving towards electrode

Question 18

Answer 18

depol @ electrode, moves back to baseline

Question 19

Answer 19

depol moving away from electrode

Question 20

Answer 20

repol moving towards electrode

Question 21

Answer 21

repol @ electrode, moves back to baseline

Question 22

Answer 22

repol went past electrode, now too far, goes back to baseline

Question 23

Answer 23

repol moving away from electrode

Question 24

which leads look at LEFT LATERAL side of heart

Answer 24

lead I
lead aVL
V5
V6

Question 25

which leads look at INFERIOR heart

Answer 25

lead II lead III lead aVF

Question 26

which leads looks at RIGHT side of heart

Answer 26

lead aVR V1

Question 27

which leads look at ANTERIOR heart

Answer 27

V2 V3 V4

Question 28

what are precordial leads

Answer 28

chest leads V1-V6

Question 29

V1 location

Answer 29

4th intercostal space- to the right of the sternum

Question 30

V2 location

Answer 30

4th intercostal space- to the left of the sternum

Question 31

V3 location

Answer 31

between V2 and V4

Question 32

V4 location

Answer 32

5th intercostal space- left midclavicular line

Question 33

V5 location

Answer 33

between V5 and V6

Question 34

V6 location

Answer 34

5th intercostal space- left midaxillary line

Question 35

define "a single vector"

Answer 35

average direction myocyte charges (current flow) are headed in

Question 36

how many stickers (electrodes) and how many leads are used for an EKG

Answer 36

10 stickers (electrodes) 12 leads

Question 37

a 12 lead EKG gives you how many views of the heart

Answer 37

12

Question 38

Q wave represents

Answer 38

septum depol

Question 39

size of R wave if right ventricle dominant

Answer 39

small

Question 40

size of R wave if left ventricle dominant

Answer 40

large

Question 41

equation for QT interval

Answer 41

QT = VD + RP + VR (= QRS wave + ST seg + T wave) VD: ventricular depol RP: refractory period VR: ventricular repol

Question 42

why is QT elongation bad

Answer 42

more time for arrhythmia to happen

Question 43

normal size for QT interval

Answer 43

< 50% of R-R interval