health care  
 
All about the stroke different stroke types ischemic stroke thrombotic stroke embolic stroke transient ischemic attack (TIA) or mini stroke hemorrhagic stroke intracerebral hemorrhage subarachnoid hemorrhage causes of stroke stroke symptoms stroke risk factors diagnosis of stroke treatment for stroke stroke medications stroke prevention surgical treatments for stroke recovery from stroke stroke rehabilitation

What is hemorrhagic stroke?

Hemorrhagic stroke accounts for 10 percent to 15 percent of all cases of stroke. In hemorrhagic stroke, bleeding in the brain itself (intracerebral hemorrhage) or between the brain and the skull (subarachnoid hemorrhage) disrupts brain function. Bleeding usually occurs because of a rupture in arterial walls that are already weakened by high blood pressure. A pool of

blood compresses brain tissue in its vicinity, preventing adequate amounts of fresh blood from reaching the area.

Hemorrhage (or bleeding) from an artery in the brain can be caused by a head injury or a burst aneurysm. Aneurysms are blood-filled pouches that balloon out from weak spots in the artery wall. They're often caused or made worse by high blood pressure. Aneurysms aren't always dangerous, but if one bursts in the brain, they cause a hemorrhagic stroke.

When a cerebral or subarachnoid hemorrhage occurs, the loss of a constant blood supply means some brain cells no longer can work. Accumulated blood from the burst artery also may put pressure on surrounding brain tissue and interfere with how the brain works. Severe or mild symptoms can result, depending on the amount of pressure.

The amount of bleeding determines the severity of cerebral hemorrhages. In many cases, people with cerebral hemorrhages die of increased pressure on their brains. But those who live tend to recover much more than people who've had strokes caused by a clot. That's because when a blood vessel is blocked, part of the brain dies — and the brain doesn't regenerate. But when a blood vessel in the brain bursts, pressure from the blood compresses part of the brain. If the person survives, gradually the pressure goes away. Then the brain may regain some of its former function.

High blood pressure is the main cause. Atherosclerosis (the buildup of fatty plaque in the arteries) weakens arterial walls, further increasing the risk of hemorrhage due to hypertension. Bleeding disorders (such as hemophilia and leukemia) and the use of anticoagulant or thrombolytic drugs increase the risk of intracerebral bleeding. Aneurysms (weak spots in the wall of an artery that may burst) are a major cause of subarachnoid hemorrhage. They are often due to congenital defects (defects present at birth). Blood vessel abnormalities such as arteriovenous malformation (AVM) may result in a stroke. A head injury may rupture arteries in the brain. Brain tumors may lead to intracerebral bleeding.

More information on the stroke

What is a stroke? - Stroke (cerebrovascular accident) is a sudden loss of consciousness resulting when the rupture or occlusion of a blood vessel leads to oxygen lack in the brain.
What're the different types of strokes? - There are two main types of stroke. Ischemic stroke is the most common type of stroke. Hemorrhagic stroke is caused by bleeding.
What is ischemic stroke? - Ischemic stroke is the most common type. Ischemic stroke can further be divided into two main types: thrombotic and embolic.
What is a thrombotic stroke? - Thrombotic strokes are strokes caused by a thrombus (blood clot) that develops in the arteries supplying blood to the brain.
What is an embolic stroke? - Embolic strokes often result from heart disease or heart surgery and occur rapidly and without any warning signs.
What's transient ischemic attack (TIA) or mini stroke? - A transient ischemic attack (TIA) is often called a mini stroke. A transient ischemic attack (TIA) is a transient stroke that lasts only a few minutes.
What is hemorrhagic stroke? - In hemorrhagic stroke, bleeding in the brain itself or between the brain and the skull (subarachnoid hemorrhage) disrupts brain function.
What is an intracerebral hemorrhage? - Intracerebral hemorrhage is usually caused by hypertension (high blood pressure), and bleeding occurs suddenly and rapidly.
What is a subarachnoid hemorrhage? - Subarachnoid hemorrhage results when bleeding occurs between the brain and the meninges in the subarachnoid space.
What causes a stroke? - Stroke caused by damage to blood vessels in the brain. The ischemic stroke is usually caused by atherosclerosis (hardening) of blood vessels.
What are the symptoms of a stroke? - The symptoms of a stroke depend on what part of the brain and how much of the brain tissue is affected. Stroke symptoms usually come on suddenly.
What are the risk factors for a stroke? - Risk factors for a stroke include high blood pressure (hypertension), atherosclerosis, cigarette smoking, atrial fibrillation, diabetes.
How is a stroke diagnosed? - Stroke is diagnosed through several techniques: a short neurological examination, blood tests, CT scans or MRI scans, Doppler ultrasound, and arteriography.
What's the treatment for a stroke? - The aim of the therapy is to minimise the size of the stroke and therefore minimise subsequent disability by restoring blood flow to the area of the brain affected quickly.
What medications can be used for stroke treatment? - Intravenous thrombolytics. clot-busting, or thrombolytic drugs are now administered intravenously for ischemic (not hemorrhagic) stroke.
What can be done to prevent a stroke? - Prevention of stoke is an important public health concern. Medication or drug therapy is the most common method of stroke prevention.
What're the surgical treatments for stroke? - Surgical treatments for stroke include carotid endarterectomy, angioplasty, clipping. Clipping involves clamping off the aneurysm.
How to recover from a stroke? - Spontaneous recovery accounts for most improvements in the first month after a stroke. Successful recovery after a stroke depends on the extent of brain damage.
What is stroke rehabilitation? - Stroke rehabilitation is the process by which patients with disabling strokes undergo treatment to help them return to normal life.
Heart & cardiovascular disorders Mainpage

Topics in heart disease and cardiovascular disorders

Coronary circulation disorders
Myocardium disorders
Heart valve disorders
Arrhythmias (abnormal heart rhythms)
Heart inflammation and infection
Congenital heart disease
Valvular disease (blood vessels disorders)
Procedures done for coronary artery disease
Devices used in cardiology
Diagnostic tests and procedures for heart diseases
Heart transplant
 

Featured articles on heart disease and cardiovascular disorders

Coronary artery disease
Heart attack (myocardial infarction)
Atherosclerosis
Cardiomyopathy
Cardiac arrhythmia
Heart valve replacement
Congestive heart failure
Aortic aneurysm
Atrial fibrillation
Stroke


All information is intended for reference only. Please consult your physician for accurate medical advices and treatment. Copyright 2005, health-cares.net, all rights reserved. Last update: July 18, 2005