What is cerebral hemorrhage?

Written by Jiang Fang Shuai

Neurosurgery

Updated on September 01, 2024

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The term "cerebral hemorrhage" usually refers to bleeding caused by non-traumatic rupture of brain blood vessels. The causes include hypertension, arteriosclerosis, amyloid angiopathy, and vascular malformations, among others, often occurring during excessive fatigue, emotional excitement, or strenuous defecation. Clinically, it has a high rate of self-harm, and most survivors suffer from varying degrees of brain dysfunction. Additionally, some cases of cerebral hemorrhage are caused by trauma; the treatment principles and prognosis for these patients are similar to those for non-traumatic cerebral hemorrhages.

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Cerebral hemorrhage CT manifestations

The CT manifestations of cerebral hemorrhage include, in the acute phase, the CT scan showing round or oval-shaped uniform high-density fresh hematoma with clear boundaries. It can determine the location, size, and shape of the hematoma, whether it has ruptured into the ventricle, and surrounding low-density edema. There are also effects of space-occupying lesions such as compression of the ventricles and brain tissue displacement, as well as obstructive hydrocephalus and other conditions where a large amount of blood in the ventricles contributes to high-density expansion. The hematoma's pressure on the surrounding brain tissue can lead to ischemia and commonly cause a characteristic ring-shaped low density due to edema around the hematoma.

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How is cerebral hemorrhage treated?

For patients with cerebral hemorrhage, the first step is to urgently send the patient to the local hospital for medical attention and head CT scans. This primarily determines the current location of the hemorrhage, the severity of the bleeding, including the number of intracerebral hematomas. If there are multiple intracerebral hematomas causing significant mass effect and substantial compression on the surrounding brain tissue, leading to neurological damage, emergency surgical treatment is generally recommended. If the bleeding is minor with no significant mass effect, conservative treatment is advised. Treatment can include hemostasis, brain health promotion, nerve nutrition, acid suppression, and prevention of lung infections, among other approaches.

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Is cerebral hemorrhage dangerous?

Cerebral hemorrhage is a type of acute cerebrovascular accident and is quite dangerous. The risk associated with cerebral hemorrhage is directly related to the amount of bleeding and the location of the bleed. Generally, if it is an ordinary lobar hemorrhage and the volume of blood is less than 30 milliliters, the risk is relatively low, and conservative medical treatment may be sufficient. However, if the bleeding exceeds 30 milliliters, there is an indication for surgery. Without surgery, conservative treatment may lead to an increase in hematoma and progressive surrounding edema, which could compress the brainstem, cause brain herniation, and lead to respiratory and circulatory failure, posing a life-threatening risk. Hemorrhages in the brainstem and cerebellum are even more dangerous. The brainstem is the center of vital functions, including the centers for breathing and heart rate. Typically, a bleeding volume exceeding 5 milliliters in the brainstem can lead to patient death. Since the cerebellum is close to the brainstem and might compress it, a bleeding volume exceeding 10 milliliters in the cerebellum often warrants consideration for surgery.

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Causes of cerebral hemorrhage

Any cause of cerebral vascular rupture and bleeding is called cerebral hemorrhage, including traumatic cerebral hemorrhage and non-traumatic cerebral hemorrhage. Traumatic cerebral hemorrhage, as the name suggests, is caused by head trauma, while the most common cause of non-traumatic cerebral hemorrhage is hypertension. Under the long-term impact of high blood pressure and high blood flow, numerous microaneurysms form in the brain's blood vessels. When blood pressure suddenly increases under certain conditions, these microaneurysms may rupture and bleed. The second most common cause is cerebral amyloid angiopathy, where blood vessels become aged, brittle, and weak, leading to rupture and bleeding. The third most common cause includes intracranial aneurysms and vascular malformations, which also partly cause hemorrhage. The fourth most common cause involves intracranial tumors, meningiomas, melanomas, and others. The fifth most common cause is related to hematological disorders, such as leukemia and deficiencies in clotting factors. Lastly, another cause is the prolonged use of anticoagulant and antiplatelet medications, which also contribute to cerebral hemorrhage.

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Is cerebral hemorrhage serious?

Brain hemorrhage is relatively serious. In most cases, the condition of patients with brain hemorrhage progresses quickly and worsens gradually, often leading to high rates of disability or mortality. Additionally, brain hemorrhages can affect the patient's level of consciousness, resulting in states of stupor or coma. On this basis, it is common for several complications to occur, such as significant pulmonary infections, acid-base imbalances, electrolyte disturbances, hypoproteinemia, or deep vein thrombosis in the lower limbs. These issues can easily cause patients to experience unilateral or bilateral limb paralysis, abnormal limb sensation accompanied by a decline in cognitive functions, aphasia, and other clinical manifestations.