IX: Diseases of the circulatory system

I60-I69: Cerebrovascular diseases

Cerebrovascular diseases refer to a group of conditions that affect the blood vessels and blood supply to the brain. These conditions arise when there is a problem with the circulation of blood to the brain, either due to a blocked blood vessel (ischemic stroke) or a burst blood vessel (hemorrhagic stroke). Symptoms that result from such conditions can differ based on the part of the brain affected but commonly include sudden problems with speaking or understanding speech, numbness or weakness of the face, arm or leg, particularly on one side of the body, vision problems, difficulty walking, and severe headaches without known cause. The disease progression often involves an acute phase followed by recovery that may include residual deficits, depending on the severity of the initial event. Factors like high blood pressure, uncontrolled diabetes, and smoking can significantly increase the risk of developing these diseases.