EKG #1

Question 1

SA node intrinsic rate

Answer 1

60-100

Question 2

atrial foci intrinsic rate

Answer 2

60-100

Question 3

AV node intrinsic rate

Answer 3

40-60

Question 4

ventricular foci intrinsic rate

Answer 4

20-40

Question 5

why does the conduction velocity decease at the AV node

Answer 5

to allow for ventricular filling

Question 6

Pacemaker: Cells that display

Answer 6

automaticity

Question 7

conduction velocity at AV node

Answer 7

.01-.05

Question 8

at rest cardiac cells are

Answer 8

polarized + on the outside

Question 9

If the electrical signal is moving towards the electrode what way is the deflection on the wave from

Answer 9

up (+)

Question 10

The basic triage shape of the EKG is called what

Answer 10

Einthoven’s triangle

Question 11

Lead I goes from (?) + ot -

Answer 11

right arm to left arm both sides are -

Question 12

Lead II direction and polarity

Answer 12

right arm left foot, both +

Question 13

Lead III direction and polarity

Answer 13

left hand to left foot arm + foot -

Question 14

what is the primary lead we look at

Answer 14

II

Question 15

AVR, AVL, AVF are called what kind of leads

Answer 15

augmented

Question 16

what side of the agumneted leads are +

Answer 16

the positive

Question 17

what plane are the limb leads in

Answer 17

frontal

Question 18

what plane are the pre cordial leads in

Answer 18

Transverse

Question 19

Locations of the precordial leads

Answer 19

V1 – fourth intercostal space (ICS) to the right of the sternum
V2 – fourth intercostal (ICS) space to the left of the sternum
V3 – midway between V2 and V4
V4 – fifth intercostal space (ICS) at the midclavicular line
V5 – anterior axillary line at the same level as V4 (5th intercostal space)
V6 – midaxillary line at the same level as leads V4 and V5

Question 20

are the precoardial leads biporlar or uni polar

Answer 20

unipolar