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Exercise Physiology > Lab quiz #4 > Flashcards

Lab quiz #4 Flashcards

1
Q

EKG or ECC

A

electrocardiogram

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2
Q

Graphical recording of the electrical current generated in the electrical conductive system of the heart
- quantity and quality of heartbeats
- mechanical activity follows electrical activity
- shows waves of depolarization/repolarization

A

EKG function

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3
Q

resting membrane is predominantly + on the outside and - on the inside

A

depolarization

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4
Q

wave of _ is an influx of positive ions making the inner membrane less negative (shift in ions)

A

depolarization

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5
Q

P wave is the _ in an EKG

A

depolarization of the atria

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6
Q

QRS complex is the _ in an EKG

A

depolarization of the ventricles

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7
Q

T wave is the _ in an EKG

A

repolarization of ventricles

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8
Q

Where is atrial repolarization in an EKG?

A

Hidden during QRS complex

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9
Q

Step 1 in the electrical system of the heart

A

Sinoatrial Node (SA node)

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10
Q

Step 2 in the electrical system of the heart
- What happened here?

A

Atrioventricular Node (AV node)
- pause to allow ventricles to fill

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11
Q

Step 3 in the electrical system of the heart

A

Left bundle branch

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12
Q

Step 4 in the electrical system of the heart
- What are they called?
- What happens here?

A

Conduction pathways
- Perkinje
- stimulates heart contractions

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13
Q

How many electrodes and leads (pictures)?

A

10 electrodes and 12 leads

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14
Q

Electrical signals = _

A

deflections

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15
Q
  1. Direction
  2. speed
  3. Mass of the tissue
A

electrical signals

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16
Q

Direction:
Signal is _ electrode
- voltage above isoelectric line ( _ )

A

towards (+)

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17
Q

Direction:
signal is _ electrode
- voltage is below isoelectric line ( _ )

A

away from (-)

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18
Q

Speed:
Fast moving signal

A

sharp spike

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19
Q

Speed:
Slow moving signal

A

rounded wave

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20
Q

Mass of tissue:
Moving through smaller mass

A

small wave

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21
Q

Mass of tissue:
Moving through larger mass

A

large wave

22
Q

Where do the Limb Leads go? (standard)

A

Right arm (RA)
Left arm (LA)
Left leg (LL)
Right leg (RL) - grounded

23
Q
  • Bipolar
  • sense electric potential between two limbs/points
A

standard limb lead (leads I, II, & III)

24
Q

Limb Lead _
- Electrode = LA +
- Electrode = RA -
- Angle of heart = lateral

A

Lead I

25
Q

Limb Lead _
- Electrode = LL +
- Electrode = RA -
- Angle of heart = inferior

A

Lead II

26
Q

Limb Lead _
- Electrode = LL +
- Electrode = LA -
- Angle of heart = inferior

A

Lead III

27
Q
  • unipolar
  • compare a central point of the standard limb leads to the RA, LA & LL electrodes
A

Augmented limb leads (aVR, aVL, aVF)

28
Q

Lead _
- Electrode = RA +
- Angle of heart = no specific view

A

Lead aVR

29
Q

Lead _
- Electrode = LA +
- Angle of heart = lateral

A

Lead aVL

30
Q

Lead _
- Electrode = LL +
- Angle of heart = inferior

A

Lead aVF

31
Q

Limb lead I: RA - – LA +
Limb lead II: RA - – LL +
Limb lead III: LA - – LL +

A

Einthoven’s triangle (standard)

32
Q

aVR: RA +
aVL: LA +
aVF: LL +

A

Einthoven’s triangle (augmented)

33
Q

Limb leads view

A

frontal plane view

34
Q

chest (precordial) leads view

A

cross-sectional (transverse) plane view

35
Q

Chest lead _
- + electrode position: 4th intercostals space; R sternal border
- Heart viewed: septum

A

V1

36
Q

Chest lead _
- + electrode position: 4th intercostals space; L sternal border
- Heart viewed: septum

A

V2

37
Q

Chest lead _
- + electrode position: midway between V2 and V4
- Heart viewed: anterior

A

V3

38
Q

Chest lead _
- + electrode position: 5th intercostals space; midclavicular line
- Heart viewed: anterior

A

V4

39
Q

Chest lead _
- + electrode position: level with V4; anterior axillary line
- Heart viewed: lateral

A

V5

40
Q

Chest lead _
- + electrode position: level with V5; midaxillary line
- Heart viewed: lateral

A

V6

41
Q

EKG paper speed

A

25 mm*s^-1

42
Q
  • 0.1 mV
  • 0.04 s
  • 1 mm
A

small square on EKG paper

43
Q
  • o.5 mV
  • 0.20 s
  • 5 mm
A

large square on EKG paper

44
Q

beats originate from sinus node

A

sinus rhythm

45
Q

Normal bpm =

A

60-100

46
Q

< 60 bpm =

A

brachycardia

47
Q

> 100 bpm =

A

tachycardia

48
Q

any irregular rhythm of heartbeats

A

arrythmia/dysrhthmia

49
Q

beat originating outside of sinus node
- PAV
- PVC

A

ectopic beat

50
Q

when the number of ectopic beats exceed number of sinus beats, person is in _, not sinus rhythm

A

Atrial or ventricular rhythm

Exercise Physiology (9 decks)

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