What is the primary effect of collapse of the circulatory system and fluid collection in the brain?

The primary effect of the collapse of the circulatory system, often referred to as a circulatory collapse, leads to a significant reduction in blood flow and oxygen delivery to vital organs, including the brain. This lack of adequate perfusion can rapidly result in cardiovascular syndrome. This condition is characterized by cardiovascular instability, which can manifest as hypotension, tachycardia, and even shock, severely impacting heart function and systemic blood circulation.

For the brain, inadequate blood flow and resulting hypoxia can lead to neuronal damage and dysfunction, but the immediate and systemic effects of circulatory collapse predominantly center around cardiovascular complications. Although nervous system damage can occur as a secondary effect, it arises from the circulatory issues rather than being the primary effect itself.

Respiratory failure and digestive disturbances would be considered later consequences or complications stemming from the overarching issue of circulatory collapse and are not the primary effects.