Final answer:
The first two signs of hypovolemic shock are a rapid, almost tachycardic heart rate and a weak pulse often described as "thready."
Step-by-step explanation:
Hypovolemic shock is a type of circulatory shock caused by excessive loss of blood volume. The first two signs of hypovolemic shock include a rapid, almost tachycardic heart rate and a weak pulse often described as "thready." Other symptoms may include cool, clammy skin, rapid, shallow breathing, hypothermia, thirst, and dry mouth.