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Lab Exam 1 > lab 3- 12 lead > Flashcards

lab 3- 12 lead Flashcards

1
Q

transducer

A

device for changing one form of energy into another

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2
Q

depolarization toward a positive electrode

A

upward wave

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3
Q

depolarization toward a negative electrode

A

downward wave

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4
Q

repolarization toward a positive electrode

A

downward wave

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5
Q

repolarization toward a negative electrode

A

upward wave

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6
Q

ground electrode

A

right leg, not used to record EKG

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7
Q

V1

A

4th intercostal, right side of sternum

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8
Q

V2

A

4th intercostal, left of sternum

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9
Q

V3

A

slightly to the left of V2, closer to V4

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10
Q

V4

A

5th intercostal space, directly below nipple

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11
Q

V5

A

5th intercostal space, anterior axillary line

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12
Q

V6

A

left mid-axillary line

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13
Q

frontal plane

A

1, 2, 3

aVR, aVL, aVF

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14
Q

transverse plane

A

V1-V6

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15
Q

best leads to look at left ventricle

A

1 and V5

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16
Q

bipolar limb leads in frontal plane

A

used to determine the vertical electrical axis of the cardiac impulse as it passes through the heart
leads 1, 2, 3
einthoven’s triangle

17
Q

aVR

A

augmented voltage right (arm)

18
Q

recording electrode=

A

positive electrode in that lead

19
Q

aVL

A

augmented voltage left (arm)

20
Q

aVF

A

augmented voltage foot (left leg)

21
Q

augmented/unipolar limb leads in frontal plane

A

aVF aVR aVL

22
Q

unipolar chest leads in transverse plane

A

V1-V6

23
Q

mean QRS vector

A

mean electrical axis of the current flow as it passes through the ventricles

24
Q

why are chest electrodes said to be unipolar?

A

only electrode that is able to read variations in the cardiac impulse as it passes through the heart

25
Q

normal range of deviation

A

-30 to 90

26
Q

RAD

A 
90- 180
thickening of RV
right ventricular hypertrophy
dextrocardia
old left ventricular MI
27
Q

LAD

A

-90 - 0
left ventricular hypertrophy
high BP
old right ventricular MI

28
Q

XRAD

A

180 - (-90)

scarring or lesion in a bundle branch

Lab Exam 1 (4 decks)

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