
Originally Posted by
Lemonada8
The vessels with dilate creating a lower afterload on the heart, lowering BP. Thats why HR goes up while on clen. U maintian cardiac output.
CO = Stroke volume X HR.
With vasodilation, you decrease afterload ( aka pressure required to force blood throughout the body), so the drop in pressure required is the lowered blood pressure, which in turn increases HR due to the body tryin to keep CO constant. The body sees the drop as loss of perfusion, so it increases HR.
u can also look at it as, more blood is being held in the vessels and less is being pumped with each beat of the heart. BP is the pressure required to move blood in the body with ( systolic = the pressure exerted by the ventricles during a contraction.. Diastolic = the pressure exerted by the volume of blood in the vessels)