What is a stroke?

Written by Zhang Hui
Neurology
Updated on January 04, 2025
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Stroke primarily refers to cerebrovascular disease. Acute onset of stroke usually presents with focal neurological deficits, mainly divided into ischemic and hemorrhagic strokes. Ischemic stroke, primarily referring to cerebral infarction, occurs due to an interruption in the blood supply to the brain, causing vessel occlusion and resulting in various clinical syndromes. Clinically, it presents rapidly with symptoms such as limb paralysis, slurred speech, and facial drooping. The pathogenesis of ischemic stroke is caused by central arteriosclerosis of large vessels. Additionally, stroke also includes cerebral embolism, mainly referring to atrial fibrillation-induced emboli from wall-attached thrombi, and other foreign bodies causing embolic blockage, leading to necrosis of brain tissue. Stroke also encompasses hemorrhagic stroke, with a typical condition being cerebral hemorrhage, which is due to long-term hypertension causing hyaline degeneration of the small arterial walls, eventually leading to necrosis and rupture with bleeding, resulting in neurological deficits.

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Written by Zhang Hui
Neurology
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Can a stroke be cured?

Stroke is mainly divided into ischemic stroke and hemorrhagic stroke. Ischemic stroke, also known as cerebral thrombosis, can benefit many patients if they can reach a hospital quickly and receive intravenous thrombolysis within the time window, such as within 4.5 hours, leaving them with only mild neurological deficits followed by proper rehabilitation training. Some patients can be cured. However, if the stroke is severe from the onset, resulting in complete paralysis or even consciousness disorders such as drowsiness, stupor, or coma, the treatment outcomes can be significantly less effective, potentially leaving some degree of disability. Generally speaking, whether a stroke can be cured depends closely on the initial severity of the stroke, the overall condition of the patient, and the timeliness of the treatment. Some conscious patients who receive timely treatment can be cured, whereas those with severe conditions typically suffer from long-term complications.

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Written by Tang Bo
Neurology
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Common clinical manifestations of stroke

Stroke includes ischemic stroke and hemorrhagic stroke, also known as cerebral infarction and cerebral hemorrhage. The clinical manifestations of cerebral infarction depend on the location of the occlusion, and may vary accordingly. Common symptoms include slurred speech and limb weakness. It generally occurs acutely, and may also include memory decline or a series of other symptoms depending on the specific location of the occlusion. If these symptoms occur, it is crucial to seek medical attention immediately, as there is an opportunity for thrombolytic treatment within 4.5 hours. In the case of cerebral hemorrhage, patients may experience symptoms during physical activity, possibly accompanied by severe headaches, as well as symptoms of neurological deficits such as unclear speech, limb weakness, or other symptoms. Seizures may also occur. It is essential to visit the hospital immediately if these symptoms appear. If cerebral hemorrhage is confirmed, the decision for surgical treatment depends on the amount of bleeding.

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Written by Zhang Hui
Neurology
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Post-stroke depression

Recent studies have confirmed that in addition to language dysfunction, cognitive impairment, and motor dysfunction, stroke patients also exhibit many signs of depression. According to guidelines published in China in 2016, about 33% of stroke patients experience post-stroke depression, which is a very high proportion. The main symptoms of post-stroke depression include a lack of interest in anything, unwillingness to communicate with others, being quiet and reticent, non-compliance with medication, and non-cooperation with rehabilitation training. Post-stroke depression significantly affects the recovery of patients and their future quality of life. Some patients may even turn to suicide due to depression. Therefore, it is crucial to pay attention to depression after a stroke, as the incidence rate of post-stroke depression is very high, reaching up to 33%. Clinicians must carefully identify it, and family members of patients must be attentive in their care.

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Written by Liu Yan Hao
Neurology
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What are the types of strokes?

The common types of strokes include hemorrhagic stroke and ischemic stroke. Hemorrhagic strokes commonly involve subarachnoid hemorrhage and intracerebral hemorrhage. Subarachnoid hemorrhage often occurs due to the rupture of cerebral aneurysms, causing blood to enter the subarachnoid space. Intracerebral hemorrhage is commonly caused by hypertension leading to the rupture of cerebral blood vessels and subsequent bleeding into the brain parenchyma. Additionally, there is ischemic stroke, commonly presenting as cerebral infarction and cerebral embolism. Cerebral embolism occurs when a blood clot from another part of the body outside the brain, following the blood circulation, blocks a cerebral vessel. Cerebral infarction happens when cerebral arteriosclerosis narrows down to a certain extent, gradually obstructing and forming cerebral infarction. These are the common types of strokes.

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Written by Tang Bo
Neurology
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What are the symptoms of a stroke?

Stroke, also commonly referred to as cerebrovascular accident, is caused by the rupture or blockage of blood vessels within the skull, leading to necrosis of brain tissue and a series of symptoms. It is divided into ischemic stroke and hemorrhagic stroke. Ischemic stroke, commonly known as cerebral infarction or stroke, while hemorrhagic stroke refers to cerebral hemorrhage. Generally, ischemic strokes account for 80% of cases. Ischemic stroke is caused by blockage of blood vessels leading to necrosis of brain tissue, presenting with a series of symptoms such as hemiplegic numbness. Cerebral hemorrhage results from rupture of brain blood vessels causing damage to brain cells and symptoms of compression, and may also present with symptoms such as hemiplegic numbness. Both types can be differentiated by their symptoms, and can also be definitively diagnosed through a CT scan.