Stroke: Brain tissue death and the importance of timely treatmentJanuary 27, 2019
A stroke is a medical emergency characterized by the death of brain tissue due to an interruption of blood flow to the brain. This interruption can occur in two primary ways:
Ischemic stroke: This is the most common type, accounting for approximately 79.4% of all stroke cases. It occurs when a blood vessel supplying blood to the brain is blocked, often by a blood clot. Hemorrhagic stroke: This type accounts for about 18.2% of cases and occurs when a blood vessel in the brain ruptures, causing bleeding in or around the brain. Additionally, there are transient ischemic attacks (TIAs), which are temporary interruptions in blood flow that typically resolve within 10 - 15 minutes. While TIAs are not strokes, they serve as critical warning signs of potential future strokes. Stroke statistics in Malaysia According to the Department of Statistics, Malaysia, stroke has emerged as one of the top five leading causes of mortality since 2000. Data from 2017 indicated that cerebrovascular diseases, which include strokes, contributed to 7.1% of all recorded mortalities in the population. The mean age for experiencing an ischemic stroke in Malaysia is around 62.8 years for the first occurrence and 64.3 years for recurrent cases. Alarmingly, studies have shown that Malaysian women tend to experience more severe strokes, have a higher number of risk factors, and poorer functional outcomes compared to men. Interestingly, post-gender age adjustment reveals an increased incidence of stroke in women, despite no differences in access to thrombolysis treatment between genders. Recognizing the symptoms Dr Rishiken Kuppusamy (pix), a consultant neurologist at Pantai Hospital Kuala Lumpur, emphasizes that strokes typically present with sudden, one-sided symptoms. These can include:
These symptoms may manifest in isolation or in combination, and it's crucial to seek medical attention immediately if you or someone else experiences them. The golden window for treatment Time is of the essence when it comes to stroke treatment. The "golden window" for effective intervention is typically within three to four and a half hours of the onset of symptoms. During this time, medical professionals can administer treatments that may reverse the effects of a stroke, restoring blood flow and minimizing damage to brain tissue. After this window closes, the chances of reversing symptoms decrease significantly. Understanding risk factors Several risk factors contribute to the likelihood of experiencing a stroke, many of which are similar to those for heart disease. These include:
In Malaysia, the demographic breakdown of stroke patients reflects the country's population, predominantly affecting Malays, Chinese, and Indians. The underlying causes of strokes often mirror those that lead to heart attacks, as the same vascular issues affect both the heart and the brain. The role of healthcare professionals Doctors utilize special scoring systems to assess an individual’s risk factors based on age, smoking habits, presence of diabetes, hypertension, and cardiac issues. This assessment can help identify those at higher risk and initiate preventive measures. Prevention and awareness Recognizing the signs of stroke and understanding risk factors are crucial steps in prevention. Here are some proactive measures you can take:
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