How to get cursortarget Blood value

[Sandbird]

I am trying to get the blood value of the cursortarget unit.
I can do this:

Bloodv=round(cursortarget  getVariable["USEC_lowBlood",false]);

but thats a bool value....How can i get the proper blood value ?
Is it broadcasted by the opposite player ? Do i have to do it myself ?

 

[Sandbird]

Ok found it : getVariable ["USEC_BloodQty", 12000]