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ecg interpretation > ecg exam 1 > Flashcards

ecg exam 1 Flashcards

1
Q

V3 and V4

A

anterior wall

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1
Q

large block method

A

count the number of large blocks between two Rs and divide 300 by that number

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2
Q

six second method

A

count the number of Rs within a six second strip and multiply that number by 10

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3
Q

atrial rate measurement

A

measure HR between Ps

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4
Q

sinoatrial node

A

first pacemaker site, has rate of 60-100bpm

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5
Q

extreme right axis deviation

A

net negative deflection in Lead I and AVF

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6
Q

limb leads

A

frontal plane, bipolar

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7
Q

positive deflection

A

electricity flows from a negative to a positive electrode

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8
Q

negative deflection

A

electricity flows from a positive electrode to a negative electrode

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9
Q

no deflection

A

electricity flows perpendicularly to an electrode

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10
Q

one small block

A

.04 seconds

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11
Q

atrioventricular node

A

second pacemaker site, has rate of 40-60 bpm

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12
Q

purkinje fibers

A

third pacemaker site, has a rate of 15-40 bpm

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13
Q

V3 and V4

A

anterior wall

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14
Q

axis deviation

A

look at leads I and AVF

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15
Q

P wave

A

atrial depolarization

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16
Q

QRS complex

A

Ventricular depolarization

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17
Q

T wave

A

ventricular repolarization

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18
Q

standard calibration measurement

A

two large blocks (10 mm)

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19
Q

lead II, III, AVF

A

inferior wall

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20
Q

small block method

A

count the number of small blocks between Rs and divide 1500 by that number

21
Q

sinus P wave

A

less than 2.5 mm

22
Q

limb leads

A

frontal plane, bipolar

23
Q

precordial/chest leads

A

horizontal plane

24
Q

normal axis deviation

A

net positive deflection in Lead I and AVF

25
Q

left axis deviation

A

net positive deflection in lead I, net negative deflection in AVF

26
Q

pathologic left axis deviation

A

net negative deflection in Lead II

27
Q

right axis deviation

A

net negative deflection in lead I, net positive deflection in AVF

28
Q

RA + LA placement

A

2 cm inferior to the clavicle and 2 cm medial to the deltoid mm

29
Q

RL + LL placement

A

half the distance between the last rib and iliac crest

30
Q

V1 and V2 placement

A

4th intercostal space to the left and right of the sternum

31
Q

V3 placement

A

midway between V2 and V4

32
Q

V4 placement

A

5th intercostal space, midclavicular line

33
Q

early transition

A

equiphasic R and S in V1 or V2

34
Q

normal transition

A

equiphasic R and S in V3 or V4

35
Q

late transition

A

equiphasic R and S in V5 or V6

36
Q

normal PR interval

A

between .12 and .2 seconds

37
Q

intercalated discs

A

joints in cardiac muscle tissue that transmit impulses very quickly through the tissue

38
Q

Lead I and AVL

A

lateral, high part of the LV

39
Q

V1 and V2

A

septal wall and part of the anterior wall

40
Q

V5 and V6

A

mid-lateral wall of LV

41
Q

ventricular rate measurement

A

measure HR between Rs

42
Q

Dubin’s method

A

find an R on a vertical dark line and count the number of large boxes until the next R (300, 150, 100, 75, 60, 50)

43
Q

irregular rhythm

A

when Rs have a deviation of greater than .06 seconds (1.5 small blocks)

44
Q

stages of depolarization

A

septal and early right ventricular activation, apical activation, left ventricle activation

45
Q

V5 placement

A

5th intercostal space, anterior axillary line

46
Q

V6 placement

A

5th intercostal space, axillary line

47
Q

normal QRS interval

A

less than .12 seconds

48
Q

equiphasic

A

upward and downward deflections result in net 0 deflection

49
Q

normal QT interval

A

no greater than .48 seconds

ecg interpretation (1 decks)

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