What causes stroke? continued

What causes stroke? continued...
Bleeding. Bleeding or haemorrhagic strokes most often stem from aneurysms in the brain that rupture. Arteries are sometimes congenitally weak, but more often they become weak under the strain of high blood pressure. Haemorrhagic strokes can also result from a leaking arteriovenous malformation, a tangle of overgrown blood vessels in the brain that some people are born with.
The vast majority of strokes affect people over the age of 60. Men are generally more often affected than women although mortality from stroke is higher in women. A more recent trend also shows that African-Caribbean people are twice as likely than Caucasians to suffer stroke, which may be because of a greater incidence of high blood pressure in the African-Caribbean community. A younger person is more prone to have a haemorrhagic stroke, while older people usually suffer ischaemic strokes.
The main controllable risk factors for stroke are as follows:
•High blood pressure
•Heart disease or high cholesterol levels (specifically, high LDL or “bad” cholesterol)
•Obesity
•Abuse of stimulant drugs, such as amphetamines
•Smoking
•Heavy drinking
•Use of oral contraceptives.
Incidence of stroke increases among people with a history of TIAs, heart disease (particularly recent heart attack, the common heart arrhythmia called atrial fibrillation, or heart valve disease), excessive blood clotting or diabetes.