WebW3b
WebW3b OP t1_iy9fy7n wrote
Reply to comment by shaokim in Eli5, how do contracted Blood Vessels lead to Increased Cardiac Preload? by WebW3b
You’re correct but what I was asking/confused about in the post was about your first paragraph. I had trouble understanding how the vasoconstriction increases/keepsConstant preload (before getting overwhelmed)
It’s true that preload & BP ultimately decreases due to overwhelming blood loss, I just couldn’t comprehend the first part about how the body tries to maintain/increase the initial drop before the overwhelming fall
Your reply is immensely insightful and much appreciated!!
WebW3b OP t1_iy9bui1 wrote
Reply to comment by shaokim in Eli5, how do contracted Blood Vessels lead to Increased Cardiac Preload? by WebW3b
That’s what had me confused, this is what I was able to understand. Circulating blood volume does indeed decrease hence blood pressure drops hence preload is decreased. the body apparently reacts to this by undergoing vasoconstriction which pushes/squeezes the red blood cells forward to the heart (blood pressure isn’t sufficient so vasoconstriction is like an additional booster to help “maintain” things) thus the blood pressure increases as the heart has just received blood (that wasn’t able to make it back before vasoconstriction) and preload increases as again heart has just received blood.
Now of course by saying “blood pressure increases” & “preload increases” it’s definitely a minuscule amount and the rate of increase is still far below than average and not enough to suffice for the body
WebW3b OP t1_iy8j4ca wrote
Reply to comment by Fellainis_Elbows in Eli5, how do contracted Blood Vessels lead to Increased Cardiac Preload? by WebW3b
Got it. Lots of Thanks !
WebW3b OP t1_iy89npn wrote
Reply to comment by Fellainis_Elbows in Eli5, how do contracted Blood Vessels lead to Increased Cardiac Preload? by WebW3b
I see, so vasoconstriction squeezes the blood cells that was initially unable to reach the heart due to low blood pressure and Thereby increasing preload?
WebW3b OP t1_iy899cp wrote
Reply to comment by betterman74 in Eli5, how do contracted Blood Vessels lead to Increased Cardiac Preload? by WebW3b
Well yes but how does increasing blood pressure and vasoconstriction lead to increased preload? Isn’t it just receiving the same amount of blood?
WebW3b OP t1_iyc4fxg wrote
Reply to comment by shaokim in Eli5, how do contracted Blood Vessels lead to Increased Cardiac Preload? by WebW3b
This proves to be very useful, Lots of Thanks!