Module 9 Flashcards

1
Q

Preload

A

The volume of fluid remaining in the right ventricle
End of the diastolic pressure
β€œStretch”

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2
Q

Afterload

A

Resistance left ventricle must over come to circulate blood
Heart has to overcome to edjuct blood
The squeeze
Peripheral vascular resistance

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3
Q

1/3
2/3
Systolic and diastolic ?

A

1/3 systolic
2/3 diastolic

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4
Q

Stroke volume

A

Is the amount of blood pumped with each contraction of the heart
Dependent on preload and afterload

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5
Q

Heart rate =

A

Is the number of heart contractions per minute?

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6
Q

Cardiac output

A

Is the amount of fluid pump by the heart each minute

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7
Q

Cardiac output formula

A

Co = sv x hr

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8
Q

Automaticity

A

Generates its own electrical impulses, without stimulation from nerves
Pacemaker

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9
Q

Intercalated discs

A

Discs that are responsible for automaticity in the heart

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10
Q

Excitability

A

Ability to respond to an electrical impulse

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11
Q

Conductivity

A

The ability to conduct excation through the cardiac muscle

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12
Q

Contractiliity

A

The ability to contract in response to stimulation

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13
Q

How blood flows in the heart

A
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14
Q

The dominant pacemaker

A

Sa node

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15
Q

Sa node rate

A

60-100

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16
Q

Av node rate

A

60-80

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17
Q

Branches of the av node rate

A

40-60

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18
Q

Purknje fibers rate

A

20-50

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19
Q

Which side of the purknje fibers have more branches

A

Left

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20
Q

Electrical impulses spread from the SA node through the ?

A

Left and right atrial

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21
Q

Electrical impulses spread from the bundle throughout the ?

A

Left and right ventricle

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22
Q

What transmits from the SA node signal from the atrium to the ventricles

A

Av node

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23
Q

What lead do we use

A

2

24
Q
A

Keep going :)

25
Q

Layers of the heart

A
26
Q

P =

A

Artial depolarization
(Contraction )

27
Q

QRS =

A

Ventricular depolarization
Contraction

28
Q

ST=

A

Beginning of ventricle repolarization
Relaxation

29
Q

T=

A

Ventricular repolarization

30
Q
A

:)

31
Q

Absolute refractory. Period.

A

The neuron can not fire another action potential

32
Q

Relative refractory. Period.

A

Occurs after absolute refractory period and it’s possible for the neuron to fire another action potential

33
Q

White is always -/+
Red is always -/+
Black is always -/+

A

White +
Red -
Black both

34
Q

Order of leads

A

White is right
Smoke over fire
Grass under white clouds

35
Q

Lead triangle

A
36
Q

Horizontal
ecg strip

A

Time

37
Q

Vertical =
Ecg strip

A

Voltage

38
Q

Paper moves at

A

25mm/sec

39
Q

Millivot =

A

2 large boxes

40
Q

Each small square =
Each large square =

A

1mm/0.04 secs

5mm /0.20 secs

41
Q

Small strip =
3 small strips =

A

3 secs
6secs

42
Q

P-R should be less than

A

0.20 seconds
One big box
Or five small boxes

43
Q

QRS should be less than

A

0.12 seconds.
What are three small boxes

44
Q

Narrow qrs =

A

Arterial

45
Q

Wide qrs =

A

Ventricular

46
Q

300 method

A

Medium accurate
Must be regular
Measure R to R
300
150
100
70
60
50
43
37

47
Q

Six second method

A

Least effective
Can be used for both
Count the number of our waves in six seconds times by 10

48
Q

1500 method

A

Has to be regular
Count the number of small boxes are the R to R
Divided by 1500
Most accurate

49
Q

Cell at rest equals

A

Inside is more negative
Resting cell membrain potential

50
Q

Depolarization

A

Stimulatea NA+ rush into the cell
Inside becomes less negative
Action potential

51
Q

Repolarization

A

Sodium potassium pump

52
Q

Sodium potassium pump

A
53
Q

Depolarization and repolarization
Chart

A
54
Q

Steps to electrical conduction

A
55
Q

Shockable rhythms

A

Pulseless v tac
V fib
Torsades de pointes