May 2018 Most Improved Competition [FINISHED: Results in post #5]

**Capebuffalo** · 06-21-2018, 04:42 PM

Originally Posted by Mr.BB

If the volume of blood pumped is lower, the hr (heart rate) will increase to compensate.

Stroke volume (SV) is the amount of blood pumped out of the heart (left ventricle - to the body) during each contraction measured in mL/beat (millilitres per beat). Therefore cardiac output (Q), the amount of blood leaving the heart each minute, measured in L/minute, can be calculated by multiplying stroke volume by heart rate (Q = SV x HR).

As you can see, the cardiac output (Q) will not increase just by increasing heart rate, since the stroke volume will probably decrease to compensate.

**Mr.BB** · 06-21-2018, 05:10 PM

Originally Posted by Capebuffalo

Stroke volume (SV) is the amount of blood pumped out of the heart (left ventricle - to the body) during each contraction measured in mL/beat (millilitres per beat). Therefore cardiac output (Q), the amount of blood leaving the heart each minute, measured in L/minute, can be calculated by multiplying stroke volume by heart rate (Q = SV x HR).

As you can see, the cardiac output (Q) will not increase just by increasing heart rate, since the stroke volume will probably decrease to compensate.

Thats a basic pump formula lol. The question was not Q increasing, it was HR increasing (to compensate Q, to use your own words heheh).