High blood pressure is one of the most common health problems in the world. Millions of people live with it every day, often without knowing they have it.
Because high blood pressure usually causes no obvious symptoms, it is often called a “silent killer.” If left untreated, it can damage blood vessels and increase the risk of heart attacks, strokes, kidney disease, heart failure, and other serious health conditions.
For decades, doctors have measured blood pressure using two numbers. The first number, called systolic blood pressure, measures the pressure inside the arteries when the heart beats and pumps blood. The second number, called diastolic blood pressure, measures the pressure in the arteries when the heart is resting between beats.
Traditionally, both numbers have been considered important when assessing a person’s health and deciding on treatment. Doctors have often been cautious about lowering blood pressure too much because of concerns that very low diastolic blood pressure might reduce blood flow to vital organs such as the heart and brain.
However, a new study suggests that the medical community may need to rethink some of these long-held beliefs.
Researchers at the National University of Ireland Galway, also known as NUI Galway, analyzed data from more than 47,000 patients from around the world. Their goal was to better understand how systolic and diastolic blood pressure levels affect health outcomes and whether both numbers are equally important when treating high blood pressure.
The findings challenge a common assumption about blood pressure management. For many years, some experts believed that there was a lower limit for diastolic blood pressure and that reducing it too much could be harmful. This concern sometimes influenced treatment decisions, especially when doctors were trying to lower high systolic blood pressure.
The new research found little evidence that lower diastolic blood pressure itself causes problems. Instead, the study suggests that the systolic blood pressure reading plays a much larger role in determining cardiovascular risk.
According to the researchers, the most important goal when treating high blood pressure should be to bring systolic blood pressure into a healthy range. Their findings suggest that aiming for a systolic pressure between 100 and 130 millimeters of mercury (mmHg) may provide important health benefits.
The researchers concluded that doctors should focus primarily on controlling systolic blood pressure and should not be overly concerned if diastolic blood pressure decreases as a result of treatment. This could simplify treatment decisions and help more patients achieve optimal blood pressure control.
The findings are important because high systolic blood pressure is strongly linked to heart attacks, strokes, and other cardiovascular diseases. By concentrating treatment efforts on reducing systolic pressure, doctors may be able to lower these risks more effectively.
While the study may influence future treatment guidelines, experts agree that prevention remains the best strategy. Maintaining healthy blood pressure throughout life can significantly reduce the risk of developing serious health problems later on.
One of the most effective ways to prevent high blood pressure is to maintain a healthy body weight. Excess weight forces the heart to work harder and can increase pressure inside the blood vessels. Even modest weight loss can have a positive effect on blood pressure.
Diet also plays a major role. Health experts recommend eating a variety of fruits, vegetables, whole grains, beans, nuts, and lean sources of protein. These foods provide important nutrients that support heart and blood vessel health. Limiting processed foods can also help because many packaged foods contain large amounts of sodium.
Reducing salt intake is particularly important. Too much sodium can cause the body to retain extra fluid, increasing blood pressure. Current recommendations suggest limiting sodium intake to no more than 2,300 milligrams per day, and some people may benefit from consuming even less.
Regular physical activity is another powerful tool for controlling blood pressure. Activities such as walking, cycling, swimming, dancing, or gardening help strengthen the heart and improve circulation. Most health organizations recommend at least 150 minutes of moderate exercise each week.
Limiting alcohol consumption can also help. Excessive drinking can raise blood pressure and increase the risk of cardiovascular disease. Smoking should be avoided as well because it damages blood vessels and greatly increases the risk of heart attacks and strokes.
Stress management is another important part of maintaining healthy blood pressure. Long-term stress may contribute to higher blood pressure levels in some people. Relaxation techniques such as meditation, yoga, deep breathing exercises, and spending time with family and friends can help reduce stress and improve overall wellbeing.
Because high blood pressure often develops without noticeable symptoms, regular health checks remain essential. Measuring blood pressure regularly allows people to identify problems early and seek treatment before serious complications occur.
The study offers a fresh perspective on how blood pressure should be managed and may influence future medical guidelines. By highlighting the importance of systolic blood pressure, researchers hope to improve treatment strategies and reduce the number of heart attacks, strokes, and other cardiovascular diseases worldwide.
The research was conducted by scientists at NUI Galway and adds to growing evidence that controlling the top blood pressure number may be one of the most effective ways to protect long-term heart health.
If you care about high blood pressure, please read studies that early time-restricted eating could help improve blood pressure, and natural coconut sugar could help reduce blood pressure and artery stiffness.
For more information about blood pressure, please see recent studies about How to eat your way to healthy blood pressure and results showing that Modified traditional Chinese cuisine can lower blood pressure.
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