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Physiology > Cardiovascular Physiology > Flashcards

Cardiovascular Physiology Flashcards

(76 cards)

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0
Q

A 1

A

Smooth muscle contracion

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1
Q

Control conduits for blood flow

A

Arterioles

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2
Q

B2

A

Smooth muscle relaxation

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3
Q

Veins contain what receptors

A

A1

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4
Q

What is Ohm’s law

A

Q(flow)= ^P/R

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5
Q

Associated with high reynold’s number

A

Turbulent flow

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6
Q

Turbulent flow is seen in

A

Anemia

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7
Q

Stroke volume/ arterial compliance

A

Pulse pressure

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8
Q

Pressure in the capillaries

A

17mmHg

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9
Q

Pressure in the vena cava

A

0mmHg

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10
Q

Pressure in the pulmonary arteries

A

25mmHg

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11
Q

Pressure in the capillaries

A

7mmHg

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12
Q

Atrial depolarizatiob

A

P wave

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13
Q

Av node conduction

A

PR sement

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14
Q

Conduction time/ velocity through the av node

A

PR interval

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15
Q

Ventricular depolarization

A

QRS

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16
Q

Ventricular repolarization

A

T wave

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17
Q

Period of depolarization+ repolarization of ventricles

A

QT interval

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18
Q

Plateau of ventricular action potential

A

ST segment

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19
Q

Ventricular action potential: Na influx

A

0

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20
Q

Ventricular action potential: K efflux

A

1

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21
Q

Ventricular action potential: Ca influx

A

2

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22
Q

Ventricular action potential: K efflux

A

3

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23
Q

Ventricular action potential: RMP

A

4

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24
SA node action potential: slow Na influx towards threshold
4
25
SA node action potential: Ca influx
0
26
SA node action potential: K efflux
3
27
Basis for v fib
Circus movements
28
Changes in the rate of relaxation
Lusitrophic
29
Changes in conduction velocity
Dromotrophic
30
Stressed volume
Arteries
31
Low P waves, tall T waves
Hyperkalemia
32
Flat inverted t waves, with u waves
Hypokalemia
33
Prolonged qt interval
Hypocalcemia
34
Shortened QT interval
Hypercalcemia
35
AV block that causes fainting in patients due to initially supressed state of Purkinje fibers
Stokes Adam syndrome
36
Produces changes jn rate of relaxation
Lusitrophic
37
Produces changes in conduction velocity
Dromotrophic
38
Affected by inotropes
Stroke volume
39
Chronotropes affect
SA node
40
Dromotropes affect
AV node
41
Phase of cardiac cycle: distal third of diastole
Atrial contraction
42
A wave is seen
Atrial contraction
43
4th heart sound
Atrial contraction
44
Preceeded by p wave
Atrialn contraction
45
Phase of cardiac cycle: preceeded by QRS complex
Isovolumic contraction
46
Phase of cardiac cycle: c wave
Isovolumic contractiont
47
First heart sounds
Isovolumic contraction
48
Phase of cardiac cycle: atrial filling begins
Rapid ventricular ejection
49
Phase of cardiac cycle: t wave
Reduced ventricular ejection
50
Phase of cardiac cycle: incisura
Isovolumic relaxation
51
Phase of cardiac cycle: v wave
Isovolumic relaxatiob
52
Phase of cardiac cycle: second heart sound is heard
Isovolumic relaxation
53
3rd heart sound is heard
Rapid ventricular filling
54
Longest phase of cardiac cycle
Reduced ventricular filling
55
Slight increase in aortic pressure during isovolumic relaxation
Incisura
56
Center responsible for regulation of HR and BP
Vasomotor area of medulla; lateral - excitatory; medial-inhibitory
57
Parasympathetic stimulation of the heart causes
Dec contractility in the atria ONLY; dec HR and conduction velocity
58
Where are baroreceptors found
Carotid sinus and aortic arch
59
Respond to increase/ derease in pressures from 50-180 mmHg
Carotid baroreceptors
60
Respond to increase in pressures >80 mmHg
Aortic baroreceptors
61
Caratois sinus baroreceptors are mediated by what CN?
IX
62
Aortic arch baroreceptors are mediated by what CN?
x
63
BP control mechanisms that respond to low O2, high CO2 concentration whenever BP is <80mmHg
Chemorecptord
64
Increased HR; helps match VR with CO
Bainbridge reflex
65
CNS ischemic response stars at BP of
<60mmHg
66
All systemic arterioles vasoconstrict severely except for coronary vessels, cerebral vessels
CNS ischemic response
67
Triad of HPN, bradycardia, irregular respirations
Cushing rxn or cushing reflex
68
Describes fluid movement into or out of the capillary
Starling forced
69
Normal net filtration (starling forces)
2mL/min
70
Mehanisms for local blood flow control
Myogenic theory, metabolic theory
71
Most potent vasoconstrictor
Vasopressin
72
Implicated in migraine
Serotonin
73
Released by damaged endothelium
Endothelin
74
Counteracts TXA2
Prostaglandin
75
Vasodilators in muscles
Lactate, adenosine

Physiology (22 decks)

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