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#1
03-20-2012
 Banned Steps History: Not yet Posts: 176 Threads: 34 Thanked 117 Times in 69 Posts Reputation: 127
Cardiovascular Physiology Calculation!

Heart Rate ............ 100 beats /min
O2 consumption..... 200 ml/min

Blood O2 content:

Systemic veins ............. 15 mL of O2/ 100 mL blood
Rt atrium ..................... 16
Rt ventricle .................. 16
Pulmonary artery .......... 16
Pulmonary vein ............. 20
Lt atrium ...................... 20
Brachial artery .............. 20 ml

Based on the above which is correct?

A- LV stroke volume = 60 mL/beat
B- RV stroke volume = 50 mL/beat
C- Systemic cardiac output = 2 liters/min
D- Shunt = 9 liter/min

#2
03-20-2012
 USMLE Forums Master Steps History: 1+CK+CS+3 Posts: 1,353 Threads: 94 Thanked 873 Times in 506 Posts Reputation: 886

Shunt? - a guess... Cuz too lil info to me
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#3
03-20-2012
 USMLE Forums Guru Steps History: 1 + CS Posts: 303 Threads: 57 Thanked 105 Times in 67 Posts Reputation: 115

i am getting cardiac output as 5L per min(ficks principle)

but i see no option as that so whats the answer?
#4
03-20-2012
 USMLE Forums Master Steps History: Not yet Posts: 928 Threads: 17 Thanked 538 Times in 375 Posts Reputation: 548

Its B .......

Yes You are correct , CO is 5 L and SV is 50 ml ...... so its testing the concept that systemic output and pulmonary output is same .....

so Rv output is 50 ml ........
 The above post was thanked by: usmlemydream (03-20-2012)
#5
03-20-2012
 USMLE Forums Addict Steps History: Step 1 Only Posts: 177 Threads: 33 Thanked 85 Times in 16 Posts

Cardiac output by ficks ...0.5l
S.V=0.5into 100
50l
And is here.

 Tags Cardiovascular-, Physiology-, Step-1-Questions

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