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Stroke is ranked as the second leading cause of death and the third leading cause of disability worldwide, as per the World Health Organization. It is estimated that 70 per cent of stroke and 87 per cent of deaths caused by stroke and disability-adjusted life years are prevalent in low and middle-income countries .
Stroke occurs when a blood vessel in the brain bursts and bleeds or when there is a reduction of blood supply to a part of your brain, which prevents the brain tissues from receiving oxygen. This causes damage to the brain cells and tissues and they begin to die in minutes.
Causes Of Stroke 
The cause of a stroke depends on the type of stroke, which are ischemic stroke, hemorrhagic and transient ischemic attack (TIA).
- Ischemic stroke - This is the most common type of stroke. It occurs when the arteries supplying blood to the brain is interrupted or blocked, due to the build of plaque or blood clots in the arteries. According to the Centers for Disease Control and Prevention (CDC), 87 per cent of strokes are ischemic stroke.
- Hemorrhagic stroke - This type of stroke happens when an artery breaks open or leaks causing blood leakage which creates excess pressure in the brain cells and tissues eventually damaging them. Medical conditions that cause hemorrhagic stroke include aneurysms (the enlargement of a weakened artery), high blood pressure, trauma and overtreatment with blood thinners.
- Transient ischemic attack (TIA) - A transient ischemic attack (TIA) also known as mini-stroke occurs when the blood flow to the brain is temporarily blocked, usually not more than 5 minutes. This type of stroke is a warning sign of a future stroke. Most often, blood clots cause transient ischemic attack (TIA).
Symptoms Of Stroke
• Slurred speech
• Numbness or weakness in the arm, face and leg.
• Trouble in speaking
• Trouble in walking
• Vision problems
• Loss of balance or coordination
• Severe, sudden headache 
Stroke In Men
According to the CDC, stroke is the fifth leading cause of death in men. It is also the leading cause of disability that mostly affects younger men aged below 44 as compared to women. The symptoms of stroke in men include slurred speech, muscle weakness and drooping on one side of the face .
Stroke In Women
Stroke is the fourth leading cause of death in women according to the CDC. The symptoms include pain, hallucination, general weakness, nausea or vomiting, seizures, fainting, shortness of breath, confusion and sudden changes in behaviour .
Risk Factors Of Stroke
• Family history
• Race and ethnicity
• Lack of exercise
• Unhealthy diet high in salt, saturated fat, trans fat and cholesterol
• Excess alcohol consumption
• Tobacco use 
Some health conditions can also increase the risk of stroke, which include high blood pressure, high cholesterol, heart disorders, heart valve defects, sickle cell disease and diabetes.
Complications Of Stroke
• Loss of memory
• Difficulty in talking or swallowing
• Emotional problems
• Behavioural changes
Diagnosis Of Stroke
The doctor will first physically examine you and ask about your medical history, symptoms and what medications you take. Then a number of tests will be conducted which include the following:
• Blood tests - It is done to help check your blood sugar levels, how fast your blood clots if you have an infection and your platelet levels.
• MRI and CT scan - MRI scan can help detect damaged brain tissues and cells. A CT scan, on the other hand, will show a clear picture of the brain that shows any bleeding in the brain.
• Echocardiogram - This test can help detect clots in the heart that may have travelled to the brain and cause a stroke.
• Carotid ultrasound - This test shows the build-up of fatty deposits (plaque) and the supply of blood in the carotid arteries.
• Cerebral angiogram - This test shows whether there are any blocked arteries in the brain and neck.
Treatment Of Stroke
The treatment depends on the type of stroke, which includes the following:
Ischemic stroke and transient ischemic attack (TIA) stroke
- Anticoagulant drugs and anti-platelet drugs - They are given within 24 to 48 hours after the onset of stroke symptoms.
- Thrombolytic drugs - They are given to dissolve the blood clots in the arteries to lower brain damage.
- Angioplasty and stents - In angioplasty, the doctor threads a catheter into the carotid arteries through an artery in your groin and a balloon is filled to widen the narrow artery. After which a stent is inserted to support the opened artery.
- Mechanical thrombectomy - The doctor inserts a catheter into a large artery inside your head and then a device is used to pull the blood clot out of the artery.
In rare cases, if these treatments don't work the doctor may perform a surgery to remove the blood clot or fatty deposits from the arteries.
• Clamping - The doctor may find out that an aneurysm hasn't started bleeding yet or has stopped bleeding. To prevent bleeding, the doctor will insert a tiny clamp at the base of an aneurysm.
• Coiling - With the help of a catheter, a coil-like device is inserted into a weakened artery to block the blood flow in the area that is bleeding.
• Stereotactic radiosurgery - This treatment procedure is used to repair the malformations of the artery.
• Surgery - Surgery is done to clip an aneurysm that has burst to prevent additional bleeding.
Prevention Of Stroke
• Maintain a healthy weight
• Stay physically active
• Eat fruits and vegetables, foods low in saturated and trans fat
• Consume alcohol in moderation
• Quit smoking
• Manage diabetes
• Control high blood pressure
After the treatment of stroke, the patient will be closely monitored and then the recovery process will start to help the patient recover.
A speech therapist, cognitive therapist, physical therapist, dietitian, neurologist, psychologist or psychiatrist are usually recommended for people who are recovering from a stroke.