Exam 1 Lecture 1&2 Flashcards
1
Q
What should be the renal clearance of glucose in mg/dl
A
0 mg/dl
2
Q
What hormone is free water clearance governed by
A
ADH
3
Q
What is the appropriate value for CVP for a totally healthy 25 year old with no comorbidity?
A
0- this shit doesn’t exist in real life
4
Q
What does pulse pressure measure and what is the normal value for a healthy person
A
Pulse pressure measures how stiff the arteries are and normal is 40 with a BP of 120/80
5
Q
Do stiff arteries have high or low pulse pressure?
A
High pulse pressure
6
Q
As blood leaves the aorta will the overall pulse pressure increase or decrease
A
Should increase overall because the blood comes into contact with stiffer arteries the farther away from the aorta we get
7
Q
What does compliance describe
What does it mean to have high compliance
What is the equation for it
A
Compliance describes how stretchy something is
High compliance= very stretchy
Delta V/ Delta P
8
Q
Compliance= Delta V/ delta P
A. If we increase volume what will that do to our compliance?
B.If we increase pressure what happens to compliance?
A
A. Increase in volume will cause an increase in compliance
B. Increase in pressure the vessels will be low compliance and overall more rigid
9
Q
What is Elastance?
What is Elastance the inverse of
A
Elastance is the inverse of compliance and describes how rigid a vessel is
10
Q
What is Elasticity and what is it similar to that we discussed in class
A
Elasticity is how stretchy something is and is similar to compliance
11
Q
Do veins have high or low compliance
Do arteries have high or low compliance
A
Veins= high compliance
Arteries= Low compliance
12
Q
What is the normal values for:
MPAP-
LAP
PAP
A
MPAP- 16
LAP- 2
PAP- 25/8
13
Q
What characteristics does the pulmonary system have in regards to resistance, pressure and compliance
A
Low resistance
Decreased pressure
High compliance
14
Q
What is the normal values for left atrial pressure, Left ventricle pressure, Right atrium pressure, and Right ventricle pressure
A
Left atrium pressure is 2-5
Left ventricle pressure 120-2
Right atrium pressure is 0-4
Right ventricle pressure 0-25
15
Q
What type of vessels have the thickest walls in comparison to their diameter
A
Arterioles
16
Q
What type of vessels have smooth muscle
A
Arteries, arterioles, veins
All of them BUT capillaries they do not have SM
17
Q
What properties do veins have in regards to their wall thickness, resistance, and pressure
A
Thin walls
Low resistance
Low pressure
18
Q
What type of vessel sits directly upstream of capillaries for our class
A
Arterioles
19
Q
What substance did we discuss in class are responsible for dilating arterioles
A
H protons
CO2
Adenosine
Im sorry about wording of the question it was trash……..
20
Q
Label the normal values of each listed I the picture
A
P cap= 30 at beginning and 10 at end average is 17 for our class. This is usually the variable he likes to mess with on Exam
Pie Cap= 28
Pif= 3
Pie isf= “not going to worry about apparently this semester but we are going to say 1” but 6 lectures later says it 8 so for our class its 8
21
Q
What organ does albumin come from
A
Liver
22
Q
What element on the periodic table that we discussed in class is NOT water soluble
A
Oxygen
23
Q
Rank in order the importance of Globulins, Fibrinogen and albumin as it pertains to colloid pressure
A
Albumin-> Globulins->Fibrinogen
24
Q
What type of vessels do Sympathetic neurons not innervated?
What do these neurons secrete that helps maintain vascular tone
A
Capillaries
Norepi
25
What is considered the second circulatory system
Lymphatic System
26
What is the normal lymphatic flow per day?
What can the lymphatic flow be if we are very active per day?
Normal is 2L/day
Active is 40L/day or 20X normal
27
What type of muscle squeezes around the lymphatic system and is responsible for keeping the flow
Skeletal Muscle
28
True or false
The lungs do have a lymphatic system and is equal adapted to remove fluid at the same rate as the rest of circulation
False
The lymphatic system of the lungs does not get rid of fluid as well as the rest of the system
29
True or false
The lymphatic system does not have one way valves because having one way valves would not allow the skeletal muscle to squeeze with enough force to keep the fluid moving
False
The lymphatic system has one way valves
I was grasping at straws here..........
30
Will paralytics increase or decrease venous return
Decrease venous return because you are paralyzing SKM
31
What valve sits next to the Isogravimetric point
Tricuspid valve
32
How far in millimeters do you have to go below the heart in regards to gravity to increase the pressure by 1mmHg
13.6mm
33
I don't know how he is going to get me with this picture but I have a feeling maybe an arrow pointing to one and asking to calculate some pressure idk
But in short you will add the pressure increase to whatever your starting pressure will be. So if he gives a starting pressure of 100 like in the arteries he might ask what is the arterial pressure at the palm of the hand
100 + 35= 135mmHg
34
Why is the pressure in the left arm +6 and not 0 even though it is on the Isogravimetric point
It should be 0 technically BUT the column of blood sitting on top of it adds pressure and makes it 0
35
What is interesting about the jugular veins in regards to their pressure
the interesting this is that their pressure is 0 even though it is above the heart which would technically make it negative. But for our class it is 0 because they would collapse under atmospheric pressure if they were negative. Need to add more info to this card he has not explained the reason why yet
36
Why is it not swell to have a "sucking" head wound beside the obvious
Because the Sagital sinus has a negative pressure so when it is exposed to atmospheric pressure it will cause air emboli to rush in. This is not were the body is most happy
37
What is the arterial pressure in the foot
190mmHg
Starts at 100 then add 90 for gravity pressure
38
What is another term for supine
Recumbent
39
Explain to me in crayon why if you stand extremely still for long periods of time why you might pass out
If we are standing and not moving can cause pooling of blood in leg veins.
40
What is conductance directly related too
Diameter
Increase in diameter will increase conductance (flow)
41
What is Distensibility and what is the equation for it
estimate of how expandable something is
42
What is the equation for Poiseuille law
43
Are arteries or veins more distensible? and by a factor of how much
systemic veins are 8 X more distensible than systemic arteries
44
Which type of flow is the most efficient
Laminar flow
45
In the brain are electrolytes able to move across the junctions as freely as in the systemic capillaries
No the brain has tight junctions and most if not all electrolytes will stay inside of the brain circulation
46
True or False
A higher Delta P value correlates to a decreased velocity of flow
False
High Delta P= High velocity
47
Which type of flow can lead to vessel wall weakening overtime
Turbulent flow
48
In this diagram what portion of the blood will have the slowest velocity
The blood on the wall will have the slowest velocity because it has the most resistance or friction
49
At what value of Reynolds number can we determine that more than likely there is turbulent flow
Greater than 2000
50
What is the formula for Reynolds number
51
What vessel did we discuss in class that always has turbulent flow
Aorta
52
Crackling or wheezing in the lungs is an example of what kind of air flow
Turbulent air flow
" I will be wheezing and freaking out if I hit turbulence in an airplane"
53
When we listen to heart sounds explain the mechanism of action for hearing a Thud and swoosh sound
The thud is from the heart valves closing
The swoosh is from turbulent aorta flow
Please excuse my broken English........
54
Which of these slopes correlates to high compliance
High compliance will have a low slope which would be the veins
High slope is low compliance which is the arteries
55
This graph is showing us what in a nutshell
This is an example of compliance or delta V/ delta P
So veins in picture has large changes in volume but not big changes of pressure so high compliance.
Arteries can't take much volume without really increasing pressure this is low compliance and a steep slope
56
Do pulse pressures increase or decrease the further away you get from the "pumping source"
Decrease
57
If you have aortic valve regurgitation what will happen to your diastolic pressure in the aorta
If we have aortic regurgitation will cause a decreased diastolic pressure because blood will leak back less than the normal 80
58
Does the aorta or the femoral artery have the wider pulse pressure
Femoral artery has the wider pulse pressure
59
How does stenosis of arteries effect our pulse pressure
If we have stenosis of the arteries cause increased pulse pressure mostly from an increase in systolic pressure
60
True or false
As we get older our pulse pressure decreases because our arteries get more worn out?
False our pulse pressure increase as we get older
61
Possible crappy math question again?
62
What pressor is best for low BP in spinal anesthesia
Norepi- replace what is gone
63
What type of nerves innervated all vessels except capillaries. They also run up the ganglia up to the brain for BP control
Sympathetic nerves
(Im not convinced im going to keep this card wording is richy
64
Do the carotid baroreceptors sit inferior or superior to the carotid bifurcation
Superior
65
What units is number of signals per second
Hertz
66
Describe path of nerve signaling from carotid baroreceptors to the brain
Neck baroreceptors connect to herring nerve then to glossopharyngeal nerve CN 9 or IX then to medulla or lower part of brainstem
67
What does NTS stand for?
How many syllables are in this?
nucleus tractus solitarius important BP control in medulla in brain stem
Haha gotcha I have no idea how many syllables
68
What is the secondary set of baroreceptors called
Aorta baroreceptors
69
What is the pressure difference between the aortic and carotid
Aortic pressure is about 20-30 mmHg higher
70
What nerve does the aortic arch baroreceptors use to communicate back to the NTS
CN X or Vagus
71
What happens if we constrict carotid bifurcation
If we constrict carotid bifurcation from suture or disease will decrease pressure going to baroceptor and cause brain to think BP is low and will systemically increase BP
72
What is the pressure cutoff that the baroreceptors won't kick in and the blood gas mechanisms will kick in to try and compensate
40
73
How many phases do we have for the cardiac cycle this semester?
What does each phase do
4 phases of cardiac cycle
Phase 1 is filling
Phase 2 isovolumic contraction
Phase 3 ejection
Phase 4 is relaxation
74
What provides passive tension in the cardiac cycle
Is our preload or diastolic pressure
(Poor wording fix)
75
Explain what is happening in phase 1
AV valves open to fill ventricle
ventricles filling with blood
during filling we have low ventricular pressure around 2-5 this is are preload
preload determine how full the heart gets by pressure not volume itself
Around 50 ml should be left in heart after ejection and this is our filling starting point this is called ESV or end systolic volume
76
How much does the heart fill in ml's
Will fill with 70ml
77
What is normal EDV
120ml
50ml starting and fill with 70ml
78
What is happening in phase 2
When Ventricle pressure exceeds atria will close AV valves, and aortic and pulmonic valves must be close
This closed valves leads to same volume in the ventricles throughout or interventricular volume should be same that is why you see straight up and down arrow on right side of this graph. Has same volume but increase pressure. If this line is not straight up in down it means we have leak into the heart probably from regurgitation
79
What is happening at point C
Point C is ventricle pressure exceeds aortic and causes aortic valve and ejection, start of phase 3, this is afterload point. Phase 3 starts by aortic valve opening
80
During phase 3 how much blood is ejected
70 ml
81
What is roughly the peak pressure in phase 3
around 120
82
At point D why does the aortic valve close
aortic valve closes because pressure in aorta and ventricles drops down to 100 and closes the aortic valve all valves closed at this point too. It also closes because the pressure in the aorta is greater than ventricles
83
What does Isovolumetric mean
No change in volume, pressure will change but volume should stay the same
84
I don't know your relationship status but what is the choke point of the systemic circulation......
arterioles
85
Does the pressure volume loop takes into account time?
Not really
86
In a normal cardiac cycle with a normal HR do we spend more time in ejection or filling
Filling
87
If we have a tachycardia patient how does that effect our filling to ejection ratio. Please provide units
Gotcha! there isn't an actual ratio that we talked about. For our class we just need to know that we will spend less time filling and more time ejecting
88
Bust out them calculators...
How many mls of blood are ejected during the last 2/3 of ejection in 1 minute
1,512ml/minute or 21ml per beat
Normal HR 72
Normal stroke volume is 70ml
Last 2/3 of ejection account for 30%
Take 30% of 70= 23.1ml per beat
21ml X 72BPM= 1,512ml/min
89
What phases according to my homie carl makeup systole
Phase 2 and 3
90
What phases according to my hood rat carl makeup diastole
End of phase 4 and phase 1
91
Which phases of the cardiac cycle have no volume changes
Phase 2 and 4
92
During filling what percentage of blood is filled during the last 1/3
14.2%
10ml in the last 1/3
Total 70ml
10/70=14.2%
93
What percentage of the blood is filled during the first 1/3 of filling
71.4%
50ml filled in first 1/3
50/70=71.4
94
Does the atria or ventricles have a lower Delta P value
Atria
95
What type of attachment do the AV valves have? Where are the AV valves attached at
AV valves have chordae tendinea and papillary muscles which attach them to walls of ventricle
96
Where does blood go after it is ejected out of the atria
Atria contraction send blood to ventricles and backward out to vena cavea because no valve there
97
What is happening during the C wave
C wave is from rapid ventricle contraction is from AV valves being hit with that pressure and creates a bowing out
98
What is happening during the V wave
V wave is from volume building up in atria, blood is still constant and coming into the atria and blood hasn’t been allowed to leave atria and go into ventricles
99
What is happening during the A wave
A wave is from atria contraction happens in last 1/3 of filling- can be seen in CVP waveform
Atria contraction send blood to ventricles and backward out to vena cavea
100
What precedes mechanical contraction
Electrical events
101
What happens first depolarization or contraction
Depolarization
102
What is the first heart sound caused by
1st heart sound is longest sound duration and from AV valves closing
103
What is the second heart sound caused by
2nd sound is aortic valve closing and shorter duration, aortic valves don’t vibrate because they are meaty
104
What is a 3rd heart sound caused by
3rd heart sound you shouldn’t hear in healthy, but if sick is from heart filling issues not a valve closing
105
What is a 3rd heart sound caused by
3rd heart sound you shouldn’t hear in healthy, but if sick is from heart filling issues not a valve closing
106
How do we calculate stroke volume
Average Stroke volume is 70 which is difference between ESV and EDV
107
If you have an increased ventricle pressure than atrial pressure what is the mitral valve doing
When ventricles higher pressure than atrial pressure mitral will be closed
Mitral opens when atrial pressure increases and ventricles decrease
108
What is happening in the shaded region? What do we call this?
EW= external work
related to amount of stuff heart is do to CV system
requires energy, volume pressure work is energy used
Work to get blood out of system, entire area in brown, this is a combination of pressures and volume being moved
109
What causes and increase in "height" on this graph
If ventricular pressure is high from high afterload will cause an increase in the graph up
110
What happens to the graph when you give WAY to much volume
If we have to much volume will shift graph to right
111
Why do we have a small blip of pressure at point B
Point B is from atrial contraction that is why you have a small increase in pressure, Atria contraction helps add 10ml to ventricles of total 70, so 60 ml not related to atria contraction
112
What percentage of CO is dependent on atria contraction in a sick heart?
What about a healthy heart
20-25% CO sick heart
5-10% Healthy heart
113
What type of gradients do heart valves operate on
Pressure gradients
114
For our class if we keep CO at 5L/min, how many mls per minute is atrial contraction responsible for in a sick heart.
(I know you probably won't have 5L/min CO in a healthy heart but lets pretend)
1000ml/min
Atrial contraction is responsible for 20-25% of CO so we will say 1L/min pr 1000ml/min
115
What are 2 determents for CO that we discussed in class
Blood vessels and pumping effectiveness are 2 determents for CO
CO=HR X SV
116
As we increase RAP what happens to our CO
Decrease overall
Decrease venous return= decrease CO
117
How do we calculate systemic filling pressure
We take our magic purple platypus and they go and stop all blood flow throughout the body. We wait for the blood to go and find equilibrium. Then the Purple Platypus go and take a pressure gauge and measure a "normal" value
Psf=7mmHg
118
How can we decrease the Psf value
"if the tank is empty this will decrease the Psf"
119
If we have a slightly negative RAP value what happens to venous return
From 0-> (-4) will increase venous return
120
What happens to the Vena Cavea if RAP is less negative than -4
Will collapse
121
Explain to me what happens with an increase Psf and a decreased Psf in regards to CO
If we decrease Psf decrease ability of heart to fill
If we decrease Psf to 3.5 will take venous return to 2.5L/min
If we increase Psf greater ability to return blood to heart
If we increase Psf to 14 will increase venous return to 10L/min
122
What is the single most important factor for systemic filling pressures
Vein tone
123
What happens to CO and RAP if we decrease Venous return
Decrease CO
Decrease RAP
124
Who is Dr. S favorite elite athlete?
What is his CO under exercise
Lance Armstrong
40L/min
125
In this picture what would cause an increase in plateau and a shift to the left
Increased contractility
126
What will cause a decrease in plateau and a shift to the right
Decrease contraction
127
For our class what does augmented mean?
"Helps"
128
What kind of heart for our class does the red line depict
A hyper effective heart
129
How would a Hypo effective heart increase CO
Hypo effective heart will need to increase venous return and thus increases RAP to get CO good
130
What does the black and red line represent
Black line is normal
Red line is strenuous exercise
131
No question yet just PTSD
132
What does the red line represent
Heart failure
133
What does the Mean Circulatory filling pressure take into account that the systemic filling pressure does not
Pulmonary Circuit
134
if we have increase volume what would we do to keep filling pressure the same
Inhibit sympathetic nervous system
135
Where does the majority of our SVR come from
Arterioles= choke point
136
How would an increase in SVR impact arterial pressure. What happens to the resistance
Increase in SVR would increase arterial pressure and make blood flow through arterioles more difficult to get from arteries to veins and back, this would increase our resistance to venous return like green
137
If we dilate the arterioles what color line would be indicative of that
Blue
138
What does RVR stand for
RVR= resistance to venous return
(Partial credit if you said Rapid Ventricular response)
139
What is free water clearance
if the patient is hypernatremic will the body increase or decrease free water clearance?
The amount of PURE water that is removed form the blood
The body should reduce free water clearance.
140
Will the pulse pressure of the arterioles be lower or higher than that of the aorta?
why?
pulse pressure should be higher. This is a function of decreases in compliance of the arterioles by comparison of the aorta.
141
In a perfectly healthy non ICU patient, what is the normal CVP according to Lecture, and where is this measurement taken?
Why is this not the case in ICU patients according to lecture?
0 mmHg, this is taken just outside of the right atrium.
Heart failure, fluid overload and supine position are three things that can increase CVP.
142
What is the formula for elastance?
1/compliance
143
What is the formula for compliance?
delta v / delta p
144
If a vessel has high compliance it will have (blank) elastance.
if a vessel has low compliance it will have (blank) elastance
low
high
145
What vessels in the body have the highest cross sectional area?
Capillaries
146
Of the great vessels of the body (Aorta, and Vena Cava), which will have the slower velocity
why?
Vena Cava. This is due to a higher cross sectional area.
V=F/A
147
What metabolic byproducts discussed in lecture will cause a dilation of the arterioles upstream of the capillary beds?
H+, CO2, Adenosine
148
According to lecture where does the lymphatic system "dump" fluid
subclavian veins at the top of the chest.
149
How many Cm below the isogravimetric point will result in a pressure increase of 3 mmHg?
4.08 Cm
1.36cm or 13.6mm =1mmHg
150
According to lecture, what are 2 reasons that we can have a "negative" pressure in the sagittal sinus when standing?
stiff vessel walls
no one way valves
151
According to lecture if a person that works for 40 years selling furniture standing on their feet all day they are likely to develop what?
Varicose veins --- we gate kept this for a while but he finally said it.
152
How does distensibility differ from compliance?
distensibility takes into account the original volume of the vascular space.
153
According to Schmiddy, how may times more distensible are systemic veins compared to arteries?
8 times
154
Conductance is? (formula)
diameter^4
155
Will a high delta p result in a fast or slow flow rate?
Fast. Flow rate is proportional to the pressure gradient that is present in the vessel.
156
What number can predict turbulent flow.
what is the cutoff where we would say that laminar flow would no longer be present?
Reynolds number
2000 Reynolds number units...... whatever those are......
157
Will a small diameter, low velocity blood vessel likely have laminar or turbulent flow?
if an absolute unit of a blood vessel like the Aorta would have turbulent flow due to its large diameter and high velocity, then for our class we will probably say that something like a vein will have laminar flow.
158
According to lecture abnormal breath sounds are caused by?
air movement being restricted where it usually isn't.
159
According to Schmiddy, what is one cause of difficulty maintaining our diastolic BP
Aortic valve regurgitation.
160
Will arteriosclerosis increase or decrease our pulse pressure?
why?
For our class we will say that arteriosclerosis will increase our pulse pressure because scarring of the arteries will probably make the walls more stiff.
161
As we age and our blood vessels become for rigid, our pulse pressure will increase. will this change be seen primarily in the systolic or the diastolic pressure?
The systolic pressure should be the one to increase, the diastolic pressure should not increase in lockstep.
162
According to lecture, if we give a patient a spinal and knock out the sympathetic chain ganglia, assuming nothing else is wrong with the patient, the lowest the pressure should get would be about (blank) mmHg
50, while not terrible this will probably not be where everyone involved is most happy.
163
Describe the path the baroreceptors in the carotid arteries take to reach the brainstem.
baroreceptors --> hearings nerve --> glossopharyngeal nerve (cranial nerve 9) --> connection to the brainstem at the NTS
164
What is the NTS
What is its function
Where is it located
nucleus tractus solitarius
regulation of BP
Brainstem
165
What is the neural path the aortic baro
receptors take to the brainstem.
aortic baroreceptors --> vagus nerve (cranial nerve 10) --> connection to brainstem at the NTS
166
If I clamp off both of my carotid arteries...... assuming I dont die...... what would happen to my blood pressure.
explain why this would probably happen
we would expect the BP to increase to try and get blood past the occlusion of the carotid arteries so your brain won't die.
167
If I have asthma and my baroreceptors are denervated as a treatment (no thank you) what will happen to my BP?
according to Dr S, we would see HUGE swings in BP, and you would probably not be super happy.
168
For this class how many phases of the cardiac cycle are there.
This class we could say there are 4 phases.
Last semester there were 5, so naturally it has to be different.....
169
Name the 4 phases of the cardiac cycle
Filling
Isovolumetric contaction
Ejection
Isovolumetric relaxation
170
What is ESV and what is the number associated with it in a healthy patient whose heart only beats at 72 BPM no more no less.
End Systolic Volume
50 mL
171
What is EDV and what is the number associated with it in a healthy patient whose heart only beats at 72 BPM no more no less.
End Diastolic Volume
120 mL
50+70=120
(70 mL of blood is added during the filling phase.)
172
What does PE represent on this graph?
Potential energy. Energy that must be used in order to get the heart to where it can produce work. Schmiddy said not to worry too much about this, and for that reason it will definitely be on the exam, have fun.
173
For this class what would we say the normal after load would be for a health adult male who is 25 years old, 70 kg, with a heart rate of 72 bpm
for this class 80 mmHg.
174
What is the formula for stroke volume
EDV-ESV
175
For this class if we were to increase the after load the heart is pumping against, how would this adjust the shaded area.
We would probably say that this would make pressure loop "taller"
176
If the frank starling law were in effect due to an increase in venous return to the heart. how would this change the volume pressure loop.
increase in venous return would in turn increase the stroke volume as such for this class we could as the volume pressure loop would get "wider"
177
According to Schmiddy, what percentage of ventricular filing of a healthy heart is done by atrial contraction
a sick heart?
for this class atrial contraction will contribute only about 5-10 % of ventricular filling in a healthy heart.
in a sick heart schmiddy agrees with the CCRN material, and we could probably say this it would be about 25%
178
What is the cause of the "blip" that occurs just before point B
atrial contraction
179
According to the wiggers diagram, what % of SV is ejected in the first 1/3 of ejection
70%
180
For this class, would we say that we spend more time with low ventricular pressure or high ventricular pressure.
we spend more time with low ventricular pressures.
181
At what time period of the cardiac conduction cycle is point C represented
Trick question !!! pressure volume loops don't account for time, crazy I know!
182
According to the Carl Wiggers Diagram how much blood is added to the ventricles in the first 1/3 of filling ?
middle 1/3 ?
last 1/3?
during with of these would trail contraction occur?
First 1/3 -- 50 mL
middle 1/3 -- 10 mL
last 1/3 -- 10 mL (atrial contraction)
183
Which of the waves on the Wiggers diagram should approximate a CVP waveform
the atrial waveform.
184
What is represented by A,C and V
A -- atrial contraction
C-- Ventricular contraction
V- filling of the atria
185
Which of the heart sound should be the shortest.
2nd due to less vibration
186
if we were to pause our CV system and you know die.... once all the pressure in the CV system were in equilibrium what would the pressure be?
7 mmHg
187
Does the Carl Wiggers Diagram look at the left of the right side of the heart?
Left, although the right side would see similar volumes just at lower pressures.
188
if we have a PRa of -2 will this increase of decrease our CO from the baseline of 5LPM?
the negative pressure should draw additional blood into the heart, in turn this should increase CO.
189
If we increase the PRa above the baseline of 0 mmHg how will this effect Venous return?
it will decrease.
190
Why can we top out venous return at 6 LPM without any additional stimulation of the vasculature from a venous tone perspective? (shitty wording sorry)
the vena cava will collapse at a venous return over 6LPM
191
By only increasing the venous return to the heart how high can we increase our cardiac output
to about 13 mmHg
192
With sympathetic stimulation what can we increase our CO to?
25-30 LPM
we can't get up to Lace Armstrongs 40 LPM.... but we also arn't cheaters so.......
193
Will a patient with a high PSF for this example 14 mmHg have a larger or smaller amount of venous return?
for this class probably larger.
194
What are two ways according to Schmiddy that we can decrease Venous return?
loose lots of volume, or lose sympathetic tone to the venous system.
195
Between the 2 variables cardiac stimulation and venous recruitment, which variable has the largest effect on CO
Venous recruitment.
196
If you have lost a massive amount of blood, how will your body respond in order maintain a PSF thats compatible with living?
Sympathetic stimulation
197
If you are fluid overloaded because someone gives you like 6L of fluid how will you compensate to maintain PSF and by extension a normal cardiac output?
sympathetic inhibition.
198
Considering the mean circulatory filling pressure and the systemic filling pressure, which one accounts for the pulmonary flow as well?
Mean circulatory filling pressure.
199
How would increasing our RVR effect our venous return
decrease RVR?
Venous return would decrease.
Venous return would increase.
200
What portion of the circulatory system does SVR and RVR originate from?
Arterioles (choke point)
