Blood pressure is something most people have checked at the doctor’s office, but many may not fully understand what the numbers mean.
A blood pressure reading has two numbers. The top number is called systolic pressure, and it shows how strongly the blood pushes through the arteries when the heart beats. The bottom number is called diastolic pressure, and it shows the pressure in the arteries when the heart is resting between beats.
For many years, doctors have focused mainly on the top number when thinking about heart health. High systolic pressure is well known to increase the risk of heart attacks and strokes. However, new research suggests that the bottom number may also play an important role, especially when it comes to brain health.
A recent study from the University of Miami has found that diastolic blood pressure may give important clues about the condition of the brain. The researchers wanted to understand whether this lower number could be linked to changes in the brain that affect memory, thinking, and balance.
To explore this, the research team studied 1,205 adults who were aged 50 and older. They measured each person’s blood pressure and also used MRI scans to look inside the brain. These scans helped them find small areas of damage known as white matter lesions.
White matter is an important part of the brain. It helps different parts of the brain communicate with each other. It carries signals that control movement, thinking, memory, and the senses.
When this white matter is damaged, it becomes harder for the brain to send clear signals. This can lead to problems such as memory loss, difficulty thinking, trouble with balance, and a higher risk of falls or strokes.
The researchers discovered a clear pattern. People with lower diastolic blood pressure, especially those with readings under 80, tended to have fewer of these brain lesions. On the other hand, people with higher diastolic pressure, above 90, had more of these small areas of damage in the brain.
This finding is important because it shows that diastolic pressure may affect the brain in ways that were not fully understood before. Earlier studies had already shown that high systolic pressure can damage blood vessels in the brain by making them narrower and less flexible.
This can reduce blood flow and harm brain tissue. Now, this new research suggests that diastolic pressure also plays a role and may affect different parts of the brain that are important for thinking and memory.
One type of lesion that stood out in the study is called periventricular white matter lesions. These are found near the fluid-filled spaces in the brain and are strongly linked to problems with memory and thinking. The researchers found that diastolic pressure was especially useful in predicting these types of lesions.
Brain health becomes more important as people get older. According to the American Heart Association, about 20 percent of people have some white matter lesions by the age of 60. By the age of 90, almost everyone has some level of these changes in the brain.
While some of these changes are part of normal aging, too much damage can lead to serious problems such as dementia or stroke.
The brain receives blood through a network of arteries, and different parts of the brain can be affected in different ways by blood pressure. This study helps scientists better understand how blood pressure affects the brain and may lead to better ways to prevent damage before it becomes serious.
The research was led by Michelle R. Caunca and was published in the journal Stroke. The findings suggest that doctors may need to pay more attention to both numbers in a blood pressure reading, not just the top one.
For individuals, this study is a helpful reminder to keep track of blood pressure and understand what the numbers mean. Managing blood pressure through healthy habits, such as eating well, staying active, and following medical advice, can protect not only the heart but also the brain.
In the end, taking care of blood pressure is about more than avoiding heart disease. It is also about protecting memory, thinking ability, and overall quality of life as we age. A simple number in a routine test may offer an early warning and a chance to take action before problems develop.
If you care about brain health ,please read studies about Vitamin B9 deficiency linked to higher dementia risk, and cranberries could help boost memory.
For more health information, please see recent studies about heartburn drugs that could increase risk of dementia, and results showing this MIND diet may protect your cognitive function, prevent dementia.
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