Complications of subarachnoid hemorrhage

Written by Zhang Hui

Neurology

Updated on September 27, 2024

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Subarachnoid hemorrhage is a very dangerous disease primarily caused by the rupture of the meninges or blood vessels at the base of the skull, leading to blood entering the subarachnoid space. Clinically, the most common cause is an aneurysm, but it can also occur with some arteriovenous malformations. Subarachnoid hemorrhage can cause severe headaches, nausea, vomiting, and other complications, with severe cases leading to coma. Common complications of subarachnoid hemorrhage include, firstly, rebleeding. The probability of rebleeding is very high, and if it occurs, the disability and mortality rates of the patient significantly increase. Secondly, cerebral vasospasm, which is an important complication that can lead to severe cerebral thrombosis due to intense constriction of the blood vessels. Thirdly, it can cause secondary hyponatremia, leading to electrolyte imbalance. Additionally, complications of subarachnoid hemorrhage include increased intracranial pressure, hydrocephalus, and more.

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Written by Wang Li Bing

Intensive Care Medicine Department

52sec

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Subarachnoid hemorrhage should go to which department?

Subarachnoid hemorrhage is also relatively common in clinical settings. Its symptoms primarily include severe headaches, reflex vomiting, possible consciousness disturbances, and even seizures. Following the occurrence of subarachnoid hemorrhage, a cranial CT scan can be used for a definitive diagnosis. Patients typically seek treatment in neurology or neurosurgery departments. After admission to a neurology ward, DSA (Digital Subtraction Angiography) can be conducted to accurately locate the bleeding site, and interventional embolization treatments may be considered. If the patient has a large volume of subarachnoid hemorrhage, neurosurgery might be considered for the removal of intracranial hematomas or decompressive craniectomy, among other procedures.

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Written by Chen Yu Fei

Neurosurgery

1min 1sec

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The difference between cerebral hemorrhage and subarachnoid hemorrhage

There is a significant difference between cerebral hemorrhage and subarachnoid hemorrhage. For subarachnoid hemorrhage, the specific causes are mainly divided into two types. The first cause is due to trauma, violent strikes, car accidents, or falls from heights, leading to localized vascular rupture and extensive subarachnoid hemorrhage. It generally presents as obvious high-density shadows in the ventricular system or cisterns. The occurrence of subarachnoid hemorrhage often leads to symptoms such as headache, dizziness, neck stiffness, and positive meningeal irritation signs. The other situation is spontaneous subarachnoid hemorrhage, most often due to intracranial aneurysms or arteriovenous malformations. Cerebral hemorrhage is primarily due to hypertensive cerebral hemorrhage, which is more likely to occur, mostly seen in the bilateral basal ganglia, presenting as localized high-density shadows.

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Written by Zhang Jin Chao

Neurosurgery

46sec

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Is it normal to have a fever with subarachnoid hemorrhage?

It is normal for patients with subarachnoid hemorrhage to develop a fever, but this must be assessed in conjunction with the patient’s body temperature and overall condition. Sometimes, the amount of bleeding in the subarachnoid space is small and may cause mild fever, mainly due to the irritation of the nerves by bloody cerebrospinal fluid. In other cases, when there is a lot of bleeding, it may cause high fever, possibly central fever, which requires specific measures to reduce the body temperature, such as pharmacotherapy, applying ice packs, or using hypothermia therapy devices. Additionally, some patients develop a fever three to five days after the subarachnoid hemorrhage, which might indicate a secondary infection, such as lung or urinary tract infections, necessitating anti-infection treatment.

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Written by Liu Yan Hao

Neurology

1min 19sec

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Subarachnoid hemorrhage is a condition.

Subarachnoid hemorrhage refers to the rupture of blood vessels due to lesions at the base or on the surface of the brain, with blood directly flowing into the subarachnoid space, causing a clinical syndrome. This is different from cerebral hemorrhage, which refers to bleeding within the brain tissue itself, not into the subarachnoid space. So, what is the subarachnoid space? The human brain is covered by three layers of membranes: the pia mater, arachnoid, and dura mater. The subarachnoid space is the area between the pia mater and the arachnoid membrane, named as such. When there is a rupture in cerebral vascular malformations or cerebral aneurysms, blood flows directly into the subarachnoid space rather than causing bleeding in the brain tissue. Subarachnoid hemorrhage is considered a very serious medical condition with a very high mortality rate. Its main symptoms include severe headache, increased intracranial pressure, nausea, and projectile vomiting. If it is a second occurrence of subarachnoid hemorrhage, the mortality rate can reach up to 50%. A third occurrence of subarachnoid hemorrhage almost certainly results in death.

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Written by Liu Yan Hao

Neurology

1min 23sec

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How long is the recovery period for subarachnoid hemorrhage?

The recovery period for subarachnoid hemorrhage is four to six weeks, during which absolute bed rest is theoretically required. Subarachnoid hemorrhage is a severe emergency in internal medicine with a very high mortality rate. Common causes of subarachnoid hemorrhage include cerebral vascular malformation, cerebral aneurysm, and rupture of blood vessels into the subarachnoid space, causing various symptoms. The main symptoms include severe headache, increased intracranial pressure, nausea, and vomiting. There are three layers of meninges in the subarachnoid space, consisting of the pia mater, arachnoid mater, and dura mater. Between the pia mater and the arachnoid mater is the subarachnoid space. Following a subarachnoid hemorrhage, a large amount of blood enters the subarachnoid space, leading to increased intracranial pressure, which can cause cerebral edema, brain cell death, and even brain herniation, potentially compressing the respiratory control center and leading to death. Without proper treatment, the mortality rate of a second subarachnoid hemorrhage can reach up to 50%, and for a third subarachnoid hemorrhage, survival is almost impossible with the mortality rate nearly 100%.