Do brain bleed, cerebral infarction, and aneurysm mean the same thing?
They do not mean the same thing. Learn the difference between a brain bleed, cerebral infarction, and aneurysm, and when to call 911 immediately.
By Dr. Martin Roberto Casas MartínezSep 10, 20266 min read
In this article
Summary: No. Stroke, cerebral infarction, and aneurysm do not mean the same thing. Cerebrovascular accident (CVA) is an umbrella term for brain damage caused by problems with its blood vessels: cerebral infarction is a CVA caused by a blockage, while “stroke” is a colloquial term that often refers to a CVA caused by bleeding. An aneurysm is a weak area in the wall of a blood vessel that may cause no symptoms and, if it ruptures, causes a hemorrhagic CVA.
In news reports and family conversations, it is common to hear that stroke, cerebral infarction, and aneurysm mean the same thing, but they do not. Understanding the difference between a blood vessel lesion, a blockage, and bleeding can help you communicate better with the medical team. If you or someone nearby suddenly develops symptoms such as weakness on one side of the body, trouble speaking, or a very severe headache, call 911 before reading further.
What is a cerebrovascular accident (CVA)?
A CVA occurs when blood flow to part of the brain is interrupted or when a blood vessel ruptures and bleeds. According to MedlinePlus, there are two main types: ischemic, caused by a clot blocking a blood vessel, and hemorrhagic, caused by a blood vessel rupturing.
The IMSS Brain Code Protocol specifies that the term stroke encompasses cerebral infarction, transient cerebral ischemia, intracranial hemorrhage, and cerebral venous thrombosis. In all cases, brain cells can be damaged within minutes due to a lack of oxygen; that is why any stroke is treated as an emergency.
What is the difference between a cerebral infarction and a stroke?
A cerebral infarction is an ischemic stroke: a clot or another blockage prevents blood from reaching an area of the brain. “Stroke” is not a precise diagnosis; MedlinePlus lists it as an alternative name for stroke in general, although in common usage it often refers to a hemorrhagic stroke.
When a doctor discusses a hemorrhagic CVA, the American Stroke Association distinguishes between two types: intracerebral hemorrhage (bleeding within the brain tissue) and subarachnoid hemorrhage (bleeding in the space between the brain and the membranes that cover it). Both are emergencies, but their causes and treatments differ from those of an infarction, and only emergency imaging studies can distinguish between them.
Is an aneurysm the same as a CVA?
No. A cerebral aneurysm is a weakened area in the wall of a blood vessel that bulges outward; MedlinePlus notes that it may exist without symptoms and be discovered during tests done for another reason. It is a structural condition, not a CVA; it causes a hemorrhagic CVA only if it ruptures.
The American Stroke Association explains that when an aneurysm ruptures, blood can leak into the space around the brain and cause a subarachnoid hemorrhage, a serious form of hemorrhagic CVA; a ruptured aneurysm is an emergency. By contrast, with an unruptured aneurysm (one that has not ruptured, although it may sometimes cause symptoms due to pressure), MedlinePlus notes that the decision to treat it depends on multiple individual factors: it does not always require immediate intervention, but it does require medical assessment and follow-up.
How should terms in reports and news stories be understood?
The key is to distinguish three things: a blood vessel lesion (aneurysm), a blockage (cerebral infarction or ischemic CVA), and bleeding (hemorrhagic CVA, including intracerebral and subarachnoid types). The following summarizes what each term describes and whether it means you should call 911.
Common terms and what they mean
- •CVA (cerebrovascular accident) — What it describes: A category that includes cerebral infarction, intracranial hemorrhage, transient ischemia, and cerebral venous thrombosis. Is it an emergency?: Yes; sudden symptoms require 911.
- •Cerebral infarction (ischemic CVA) — What it describes: A blockage of blood flow to an area of the brain. Is it an emergency?: Yes; call 911.
- •Stroke — What it describes: A colloquial term; it may refer to any CVA, but often refers to a hemorrhagic one. Is it an emergency?: Yes; call 911.
- •Subarachnoid hemorrhage — What it describes: Bleeding in the space around the brain; it may be caused by a ruptured aneurysm. Is it an emergency?: Yes; call 911.
- •Unruptured aneurysm — What it describes: A bulge in the wall of a blood vessel that has not ruptured; a structural condition, not a CVA. Is it an emergency?: It requires specialized assessment; it is not always an immediate emergency.
- •Transient cerebral ischemia — What it describes: CVA-like symptoms that resolve on their own; a warning sign of risk for a more serious CVA. Is it an emergency?: Yes; call 911 even if the symptoms have resolved.
Frequently asked questions
Can you tell at home whether it was an infarction or a stroke?
No. Sudden symptoms are similar in both cases, and only a clinical evaluation and emergency imaging studies can distinguish an ischemic CVA from a hemorrhagic one. That is why the right thing to do when any warning sign appears is to call 911, rather than trying to rule it out at home.
Is every subarachnoid hemorrhage caused by an aneurysm?
No. A ruptured aneurysm is an important cause, but MedlinePlus notes that a subarachnoid hemorrhage may also result from a head injury or other abnormalities in the brain’s blood vessels. Identifying the cause is part of emergency care and guides treatment.
Does finding out I have an aneurysm mean I had a CVA?
No. An unruptured aneurysm is an abnormality in the wall of a blood vessel that has not ruptured; many are discovered by chance and cause no symptoms. A CVA requires that a blockage or bleeding has occurred. The specialist can explain what the finding means in your case.
What should you ask the treating team?
If symptoms come on suddenly, call 911 first. If your family member is already in the hospital, these questions can help you understand the diagnosis:
- •What type of stroke did they have: ischemic or hemorrhagic, and what did the imaging studies show?
- •Was an aneurysm or another blood vessel problem found? Is it ruptured or unruptured?
- •What is the immediate plan, what signs should I report, and what is the next step for follow-up?
For non-urgent questions or to request an individual assessment, you can contact the office.
Informational notice: This content is for informational purposes and does not replace a medical consultation or constitute a diagnosis.
References
- •
- •
- •
- •
- •
