Question

In the following data belongs to an adult male $Cardiaindex=\frac{\text{Cardiac output}}{\text{Total body surface area}}$
Total body surface area in adult $-1.7m^2$
Cardiac index $-4litre/mt./m^2$
Heart rate $-68/minute$
End systolic volume $-50ml$.
Total body surface area $-1.7m^2$
Then choose the correct set of option.

• A. Cardiac output $=5litre/minute$., stroke volume $=70ml.;EDV=120ml$
• B. $C.O.=5litre/minute.,SV=100ml;EDV=50ml$
• C. $C.O.=6.8litre/minute.,SV=50ml;EDV=120ml$
• D. $C.O.=6.8litre/minute.,SV=100ml;EDV=150ml$

Answer 1

The correct option is A Cardiac output $=5litre/minute$., stroke volume $=70ml.;EDV=120ml$

• Cardiac index = Cardiac output/ Total body surface.
  

So, Cardiac output = Cardiac index X Total body surface = 4 X 1.7 = 6.8litre/min

• Now, Cardiac output = Stroke volume X heart rate
  

So, Stroke volume = cardiac output / heart rate = 6800/68 = 100ml

• Stroke volume (SV) = end diastolic volume (EDV) - end systolic volume (ESV)
  

So, EDV = SV + ESV = 100 +50 = 150ml

So, the correct option is ' C.O= 6.8 litre/minute, SV = 100ML, EDV = 150ml'.