New research suggests there is a strong connection: if your heart health isn't great when you are in your 40s or 50s, you have a higher chance of being diagnosed with dementia much later in life. The study, published in the European Heart Journal, of 6,000 people found those who developed dementia had high levels of a protein called troponin. This protein signals heart muscle damage and showed up in their blood up to 25 years before they were diagnosed with the brain condition. People with high troponin levels were 38% more likely to get dementia. How Can a Heart Test Reveal Dementia Risk?Troponin is a chemical that doctors usually look for when they think someone has had a heart attack. However, even if you haven't had a heart attack, high levels of troponin can still mean your heart muscle is being damaged bit by bit over time or isn't working as well as it should. This damage can hurt the body's blood vessels, which in turn can reduce the amount of vital blood flowing to your brain. The researchers checked health data from a long-running study that followed people for an average of 25 years after they had their heart protein levels tested. How is Heart and Brain Health Connected? According to the American Brain Foundation, poor heart health significantly raises your risk for a stroke because arteries supplying the brain can become narrowed by plaque buildup or instantly blocked by blood clots. This damage, called an ischemic stroke, is accelerated by issues like high blood pressure, cholesterol, diabetes, and smoking. Taking care of your heart ensures your brain receives the necessary healthy blood flow. Keeping your heart and blood vessels healthy also significantly lowers your risk of developing dementia later on. Heart disease is closely linked to memory decline; coronary heart disease alone increases dementia risk by 40%. Managing risk factors like high blood pressure, diabetes, and especially cholesterol is key to protecting your long-term brain health. Thinking about your brain's blood flow may not be a daily habit, but adopting healthy habits consistently over the long term can make a huge difference. No matter your age, it is never too late to start focusing on improving and protecting your circulatory and brain health. Can Testing for Heart Diseases Prevent Dementia? The researchers points out that the damage leading to dementia happens very slowly, over many years. They emphasize that if you manage common problems like high blood pressure in your middle years, you might be able to slow down or even stop the development of dementia, just as you protect yourself from heart problems. The scientists think testing for troponin could eventually become a key part of a doctor's check-up to predict someone's future risk of developing dementia. Heart Health is Brain Health Health experts agree that these findings are a strong reminder that the health of your heart and your brain are inseparable. The best ways to protect your brain are the same ways you protect your heart: keep your blood pressure and cholesterol down, exercise regularly, manage your weight, and avoid smoking. Medical foundations are now putting more money into research focused on understanding and preventing this connection, particularly vascular dementia.
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