Wikipedia defines it as:
"the volume of blood pumped from the left ventricle per beat"

However, my AS level textbook for biology states that it is the volume of blood pumped out at each beat (i.e. both left and right ventricles), as shown in the picture attached.

So...which is the correct definition of stroke volume in the context of calculating the cardiac output?

Thank you!

Post's pictures

stroke volume.JPG, 14.02 kb, 389 x 67

SV and therfore cardiac output can be calculated for the right and left ventricles and the wikiepdia pages shows those figures. The CO for RV and LV in a normal individual is the same.