What is a stroke?

Written by Zhang Hui
Neurology
Updated on January 04, 2025
00:00
00:00

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.

Other Voices

doctor image
home-news-image
Written by Tang Bo
Neurology
1min 18sec home-news-image

What medicine to take for a stroke?

Stroke includes ischemic stroke and hemorrhagic stroke, also known as cerebral infarction and cerebral hemorrhage. The medications used for these two diseases differ, so it is essential to identify which type of disease it is. When symptoms occur, such as slurred speech, limb weakness, or other symptoms, it is crucial to seek medical attention immediately. Perform a cranial CT scan first to rule out bleeding, and then consider cerebral infarction. If it is a cerebral infarction, thrombolytic therapy can be administered within 4.5 hours of the acute phase, followed by hospital treatment. During the acute phase of a cerebral hemorrhage, the decision on whether to proceed with surgery depends on the amount of bleeding. Regardless of the situation, these conditions are often underpinned by several underlying diseases, such as hypertension, diabetes, or hyperlipidemia, along with other risk factors. Therefore, medication needs to be personalized, and it is also necessary to check for any contraindications to determine what medication to use. (Medication use should be guided by a professional doctor.)

doctor image
home-news-image
Written by Zhang Hui
Neurology
50sec home-news-image

What is a stroke screening?

Screening for stroke primarily targets high-risk groups, conducting relevant examinations to identify individuals at high risk of stroke and provide timely preventive treatment to prevent the formation of cerebral thrombosis. For example, stroke screening requires thorough checks of blood sugar, blood lipids, and homocysteine levels. It is also necessary to measure the patient's blood pressure and assess the condition of the patient’s blood vessels. This includes carrying out ultrasound scans of the bilateral common carotid, internal carotid, and vertebral arteries, as well as transcranial Doppler or cranial MRA examinations. If a patient exhibits significant cerebral arteriosclerosis with arterial narrowing, they are considered part of a high-risk group and must undergo appropriate interventional treatments.

doctor image
home-news-image
Written by Tang Ying
Physical Medicine and Rehabilitation
1min 15sec home-news-image

The soft paralysis phase of a stroke refers to a few weeks after the onset.

The recovery of stroke patients is generally divided into four phases: the flaccid phase, also known as the hypotonic phase, the spastic phase, the recovery phase, and the sequelae phase. The symptoms of the flaccid phase mainly include muscle relaxation, low muscle tone, and lack of autonomous movement. The majority of patients maintain the flaccid phase for about one to three weeks, and depending on the individual's condition, they generally begin to enter the spastic phase after one to three weeks. A small portion of patients with severe conditions and poor initiative, who have not undergone formal rehabilitation training, may extend their flaccid phase to more than a month or even longer. Therefore, receiving early formal rehabilitation training to improve muscle strength and spasticity treatment can allow patients to smoothly transition through the flaccid phase and gradually enter the spastic phase. Good management of spasticity is even more beneficial for the patient’s recovery. Rehabilitation training can help stroke patients recover sooner and faster.

doctor image
home-news-image
Written by Sheng Wang
Neurology
57sec home-news-image

Causes of Dysphagia after Stroke

The causes of dysphagia resulting from a stroke are largely related to the location of the stroke. Dysphagia mainly involves the glossopharyngeal and vagus nerves, which are distributed in the medulla oblongata of the brainstem. Therefore, if you have a brainstem stroke, specifically at the medulla oblongata, there is a significant chance of experiencing coughing due to aspiration and dysphagia. If the stroke occurs in a different area, these symptoms are unlikely to appear. A stroke in the cerebral hemisphere, since it has bilateral nerve supply, does not lead to noticeable coughing if only one side is affected. However, if one side is affected this year and the other side next year, similar symptoms of aspiration cough and dysphagia will occur. Therefore, neurologically, the location and specific site of the stroke are crucial, as each location presents different symptoms.

doctor image
home-news-image
Written by Liu Yan Hao
Neurology
55sec home-news-image

The difference between stroke and cerebral infarction

The difference between stroke and cerebral infarction lies in the scope of stroke, which is broader and includes cerebral infarction. Stroke is divided into hemorrhagic stroke and ischemic stroke. Common types of hemorrhagic stroke include cerebral hemorrhage and subarachnoid hemorrhage. Common types of ischemic stroke include cerebral infarction and cerebral thrombosis. Thus, the scope of stroke is relatively large and includes cerebral infarction. Cerebral infarction occurs when a blockage in the cerebral blood vessels leads to ischemia, edema, and necrosis of the brain tissue in the supplied area, resulting in symptoms of stroke. Additionally, cerebral embolism occurs when an embolus from another part of the body detaches and blocks a brain artery, causing ischemia and necrosis of the brain tissue in the supplied area, also leading to stroke.