Obstruction of blood supply to the brain can be caused by arteries that supply blood to the brain is broken by certain causes. For example, blood pressure suddenly high. Increased blood pressure suddenly height can be caused by hypertension, psychological stress, head trauma or increased pressure such as coughing loudly and others. The blood vessels that rupture is usually due to artery-shaped thin-walled balloon, called aneurysms or atherosclerotic arterial wounds. Brain bleeding may occur in the brain called brain hemorrhage, so the brain contaminated by blood collection (hematoma), or blood into the subarachnoid space called the subarachnoid hemorrhage.
Subarachnoid hemorrhage there are 2 types, namely primary and secondary. Primary when a ruptured blood vessel from an artery in the subarachnoid. Secondary when the source of blood from other places outside the subarachnoid space into the room subarachnoid. In the blood vessels that rupture can occur contraction / vasocontraction, namely diminution arterial lumen or channel which can inhibit brain blood flow, and symptoms that arise depend on which brain areas are affected.
Hemorrhagic strokes are divided into:
- Subarachnoid hemorrhage (PSA)
- Intracerebral hemorrhage (PIS), or intraventrikel intraparenkim