Traditionally, strokes have been divided into two major types: ischemic strokes and hemorrhagic strokes. This time, we will learn about hemorrhagic stroke, which is a condition without warning signs where just one second can mean the difference between life and death.
Understanding Hemorrhagic Stroke
Hemorrhagic stroke occurs when blood vessels in the brain rupture or leak, causing blood to flow into the surrounding brain tissue and causing damage. This type of stroke accounts for about 20% of acute stroke cases and presents symptoms such as weakness, numbness on one side, facial drooping, difficulty speaking, and double vision.
Types of Hemorrhagic Stroke
Hemorrhagic strokes can be categorized into two types: intracerebral hemorrhage and subarachnoid hemorrhage.
- Intracerebral Hemorrhage occurs when a blood vessel ruptures within the brain itself, typically due to chronic high blood pressure or age-related vascular degeneration.
- Subarachnoid Hemorrhage occurs when blood collects under the arachnoid membrane. It is often caused by two types of vascular abnormalities: aneurysms and arteriovenous malformations (AVMs), which can be congenital.
Common Causes of Hemorrhagic Stroke
The two most common causes are:
- Arteriovenous Malformation (AVM) Occurs in about 10-18% of the adult population (per 100,000 people) and is present from birth. AVMs can lead to hemorrhagic or ischemic strokes.
- Aneurysms typically develop after age 30 and are more common in women. Risk factors include high blood pressure, heavy smoking, drug abuse, and infections.
Diagnoses of Hemorrhagic Stroke
The purpose of diagnosis is twofold: to determine whether the stroke is ischemic or hemorrhagic and to identify the location of the bleeding (within the brain or beneath the membranes). If bleeding is found under the membranes, it indicates the presence of an aneurysm or AVM.
Diagnostic Steps
- Doctors will first use a CT or MRI scan to identify the location of any bleeding.
- If bleeding is found beneath the membranes, doctors will perform detailed imaging of the blood vessels using MRI, CTA, or angiography to examine the structure and blood flow.
Treatment Options
1. For intracerebral hemorrhage:
- Doctors aim to reduce intracranial pressure to prevent patient death.
- If the blood clot is small and not causing significant pressure, treatment may involve medication.
- For larger clots, surgical intervention is often necessary, as waiting for medication to take effect could be life-threatening.
2. For subarachnoid hemorrhage:
If caused by an aneurysm, treatment options include:
- Clipping to close off the aneurysm and prevent blood flow.
- Coiling, where a catheter inserts coils into the aneurysm to block blood flow.
3. For AVMs, treatment may involve:
- Surgical removal of the abnormal blood vessels.
- Endovascular techniques using glue to block the abnormal vessels.
- Radiation therapy may also be an option.
More topics: Stroke: Causes of Hemiplegia and Paralysis—Delayed Treatment Can Be Fatal
Last updated:
September 25, 2024
