Hemorrhagic Stroke

Hemorrhagic Stroke

      Hemorrhagic stroke is a stroke caused by non-traumatic intracranial hemorrhage. In a hemorrhagic stroke, blood vessel rupture thereby inhibiting normal blood flow and blood seeping into an area in the brain and damage. Nearly 70% of cases of hemorrhagic stroke in patients with hypertension. Hemorrhagic strokes include bleeding in the brain (intracerebral hemorrhage) and bleeding between the inner and outer layers of tissue that protects the brain (subarachnoid hemorrhage). Other disorders which include bleeding within the skull, including epidural and subdural hematoma, which is usually caused by a head injury.
This disorder causes different symptoms and are not considered as a stroke. Here is a more detailed description of the types of hemorrhagic stroke:

Intracerebral hemorrhage

Intracerebral Hemorrhage

      Intracerebral hemorrhage is due to the extravasation of blood into the parenchymal tissue caused ruptures in the perforating arteries. This type of stroke amounted to approximately 10% of all strokes but has a higher percentage of deaths due to stroke than others. Among people older than 60 years, intracerebral hemorrhage is more common than subarachnoid hemorrhage.
      Intracerebral hemorrhage often occurs in the area of ​​vascularization in the lining of the cerebral hemispheres. Bleeding that occurs mostly in small-caliber blood vessels and there is a layer in the (deep arteries). Intracerebral hemorrhage is very common when chronic high blood pressure (hypertension) weaken small arteries, causing it to rupture. Hypertension as a causative correlation is corroborated by the haemorrhage vertikel enlargement of the left ventricle in most patients. Chronic hypertension who gives the risk of hemorrhagic stroke caused by rupture of a brain blood vessel caused by a degenerative process of the blood vessel wall.
       Some elderly people have abnormal levels of a protein called amyloid that accumulates in the arteries of the brain. This buildup (called amyloid angiopathy) weakens the arteries and can cause bleeding. Generally the cause is not a lot, including blood vessel abnormalities present at birth, injury, tumors, inflammation of the blood vessels (vasculitis), bleeding disorders, and the use of anticoagulants in doses that are too high. Bleeding disorders and use of anticoagulants increases the risk of dying from intracerebral hemorrhage.
       Intracerebral hemorrhage is the most dangerous type of stroke. More than half of patients who had extensive bleeding, dying within a few days. Patients who survive usually recover and partly conscious brain function returns, because the body will absorb the remaining blood.

Subarachnoid hemorrhage

Subarachnoid hemorrhage

       Subarachnoid hemorrhage is bleeding into the space (subarachnoid space) between the inner layer (pia mater) and middle layer (arachnoid mater) network melindungan the brain (meninges). The most common cause is rupture of the vessels bulge (aneurysm). Typically, the vessels rupture causing a sudden, severe headache, often followed by a brief loss of consciousness. Subarachnoid hemorrhage is a life-threatening disorder that can quickly result in serious permanent disability. This is the only type of stroke is more common in women.
        Subarachnoid hemorrhage is usually resulting from head injury. Nevertheless, bleeding resulting in a head injury that causes different symptoms and is not considered a stroke. Subarachnoid hemorrhage is considered a stroke just when it happens spontaneously, when bleeding does not result from external forces, such as an accident or fall.
      Spontaneous bleeding usually results from sudden rupture of aneurysms in cerebral arteries. Aneurysms stand on the weak areas in the artery wall. Aneurysms usually occur where arteries branch. Aneurysms likely present at birth (congenital), or they developed later, after the annual high blood pressure weakens artery walls. Subarachnoid hemorrhage caused most of the aneurysms since birth.
       Subarachnoid hemorrhage often result from rupture of the abnormal tissue between the artery with a vein (arteriovenous malformation) in the brain or its surrounding areas. Arteriovenous malformation likely present at birth, but it is usually identified only if symptoms occur. Rarely, blood clots formed in the infected heart valve, traveling (become an embolus) into the arteries supplying the brain, and cause the arteries to become inflamed. The artery can weaken and rupture.



RELATED ARTICLES

•    Definition of Stroke

•    Causes and Risk Factors of Stroke

•    Types of Stroke

•    Ischemic Stroke

•    Clinical Symptoms of Ischemic Stroke

•    Clinical Symptoms of Intracerebral Hemorrhage Stroke

•    Clinical Symptoms of Subarachnoid Hemorrhage Stroke

•    Complications of Stroke

•    How to Diagnose Stroke

•    Treatment and Therapy of Stroke Acute Phase

•    Post-Acute Phase Therapy of Stroke


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Resources
1. Picture:
 - http://iahealth.net/hemorrhagic-stroke
 - http://neuropathology-web.org/chapter2/chapter2cCerebralhemorrhage.html
 -http://www.merckmanuals.com/home/brain_spinal_cord_and_nerve_disorders/stroke_cva/hemorrhagic_stroke.html