Causes of cerebral hemorrhage

Written by Jiang Fang Shuai
Neurosurgery
Updated on September 15, 2024
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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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Neurosurgery
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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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Neurosurgery
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Symptoms of cerebral hemorrhage

For patients with cerebral hemorrhage, the specific symptoms that appear depend on the location and amount of the bleed. For example, if the bleeding is in an important area for motor function, such as bilateral bleeding in the basal ganglia region, it often leads to contralateral hemiplegia in the patient, and is likely to be accompanied by abnormal sensations in the affected limbs. Additionally, if the bleeding is located in the language function area, the patient may exhibit impaired language functions, such as speech disorders, slurred speech, and difficulty speaking. Furthermore, conditions such as anomia, motor aphasia, or mixed aphasia may also occur.

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Neurology
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Causes of cerebral hemorrhage

The most common cause of cerebral hemorrhage is hypertensive cerebral hemorrhage. Patients with hypertension who do not adequately control their blood pressure, which frequently fluctuates, can lead to hardening of the cerebral vessels. The elasticity of the cerebral vessel walls diminishes, and when the blood pressure rises sharply, it can cause the cerebral vessels to rupture, leading to cerebral hemorrhage. This is the most common cause of cerebral hemorrhage, accounting for over 80%. Another common cause of cerebral hemorrhage is the rupture of cerebral aneurysms, which often leads to subarachnoid hemorrhage. Patients with this condition experience severe headaches, consciousness disturbances, and restlessness. Subarachnoid hemorrhage is a relatively severe medical condition with a high mortality rate. Additionally, some cerebral hemorrhages are caused by trauma, leading to cerebral contusion, skull fractures, subdural hematoma, and epidural hematoma. These causes account for a relatively small proportion of clinical cases.

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Neurosurgery
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Principles of Treatment for Cerebral Hemorrhage

For patients with cerebral hemorrhage, the main principle of treatment is to control the blood pressure in a relatively stable state. Blood pressure should not be too high or too low. If it is too low, it can easily lead to insufficient cerebral perfusion pressure, thus causing local cerebral tissue ischemia and hypoxia, leading to the occurrence of cerebral infarction. If the blood pressure is too high, it can easily exceed the regulatory function of the blood vessels, often causing secondary hemorrhage. Secondly, it is important to promptly monitor the patient's vital signs, observe the patient's consciousness, pupils, and limb movement, and timely perform a follow-up head CT scan to dynamically observe the changes in the patient's condition.

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Written by Chen Yu Fei
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What are the symptoms of cerebral hemorrhage?

For patients with cerebral hemorrhage, the symptoms vary clinically due to different amounts of bleeding and instability of the hemorrhage, which affect the surrounding brain tissue to different extents. For patients with minor cerebral hemorrhage, the impact is generally minor, and most patients only exhibit mild symptoms such as headache, dizziness, nausea, and retching. For patients with larger bleeding volumes located in crucial motor and speech functional areas, they often show symptoms such as unilateral limb paralysis and abnormal sensations in the affected limbs, accompanied by significant headaches, dizziness, reduced intellectual levels, cognitive impairments, and even aphasia.