High blood pressure, or hypertension, is a major risk factor for strokes. Blood pressure is measured in two numbers: systolic (the top number) and diastolic (the bottom number). Systolic pressure is the force of blood in the arteries when the heart beats, while diastolic pressure is the force of blood when the heart rests between beats. While systolic pressure tends to be the focus of blood pressure management, diastolic pressure is also important for heart health. Normal blood pressure is a systolic pressure of less than 120 mm Hg and a diastolic pressure of less than 80 mm Hg. When it comes to stroke risk, a diastolic number of 90 or above is considered Stage II hypertension, which is a warning sign. However, systolic pressure is generally considered a better predictor of stroke risk than diastolic pressure.
Characteristics | Values |
---|---|
Normal diastolic blood pressure | Below 80 mm Hg |
Elevated diastolic blood pressure | 80-89 mm Hg |
Stage 1 hypertension | 80-89 mm Hg |
Stage 2 hypertension | 90 mm Hg or more |
Hypertensive crisis | 120 mm Hg or more |
What You'll Learn
- Diastolic pressure is the pressure during the resting phase between heartbeats
- Systolic pressure is the force of blood in the arteries when the heart beats
- High blood pressure is a major risk factor for stroke
- A systolic number of 120-129 and a diastolic number below 80 is deemed elevated
- Diastolic pressure declines with age
Diastolic pressure is the pressure during the resting phase between heartbeats
While systolic pressure tends to increase with age as blood vessels weaken and narrow, diastolic pressure declines after age 50. This is because arteries become less elastic with age. If they become too stiff, arteries have a harder time springing back between heartbeats, causing diastolic blood pressure to drop.
According to current guidelines, a healthy blood pressure reading is a systolic number of less than 120 mm Hg and a diastolic number of less than 80 mm Hg. A systolic number between 120 and 129, with a diastolic measurement of less than 80, is considered "elevated".
When diagnosing high blood pressure (hypertension), either the systolic or diastolic number can be an indicator if persistently elevated. For example, Stage 1 hypertension is defined as a systolic pressure of 130-139 or a diastolic pressure of 80-89. Stage 2 hypertension is defined as a systolic pressure of 140 or higher or a diastolic pressure of 90 or higher.
It is important to keep track of both systolic and diastolic numbers, as high blood pressure can increase the risk of a stroke. A high systolic number can indicate that the heart is working harder to pump blood, while a high diastolic number may mean that the coronary vessels are not supplying enough oxygen to the heart muscle.
However, it is also possible to have only a high systolic number, a condition known as isolated systolic hypertension, which is common among older adults due to less elastic arteries.
To manage blood pressure and reduce the risk of stroke, lifestyle changes such as a healthy diet, regular exercise, weight management, and avoiding smoking are recommended. If these measures are not sufficient, blood pressure-lowering medications may be prescribed.
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Systolic pressure is the force of blood in the arteries when the heart beats
When your heart beats, it squeezes and pushes blood through your arteries to the rest of your body. This is the systolic pressure. The second or ''bottom' number is the diastolic pressure, which is the pressure in the arteries when the heart rests between beats. This is the time when the heart fills with blood and gets oxygen.
A systolic blood pressure reading of 120 or lower is considered healthy. A reading of 130-139 indicates hypertension stage 1, and 140 or more is hypertension stage 2. A reading of 180 or more is a hypertensive crisis and requires immediate medical attention.
High blood pressure, or hypertension, can lead to serious health problems including heart attack, stroke, heart failure, or kidney failure. It is a major risk factor for stroke and can damage and weaken the blood vessels, making it easier for blood clots to form or for arteries to rupture. This can lead to an ischemic stroke, the most common type, or a hemorrhagic stroke.
It is important to monitor your blood pressure regularly, especially if you have high blood pressure. This can be done with a home monitor, and it helps you and your doctor understand if your blood pressure-lowering strategies are working.
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High blood pressure is a major risk factor for stroke
High blood pressure, also known as hypertension, is a major risk factor for stroke. Hypertension is when the force of blood flowing through the blood vessels is consistently too high. This puts extra strain on the heart, which has to work harder to pump blood. Over time, high blood pressure can damage the blood vessels, making them less flexible and more vulnerable to blockages or ruptures. This can lead to a stroke.
Blood pressure is measured in two numbers: systolic and diastolic. Systolic pressure, the upper number, is the pressure in your arteries when your heart beats. Diastolic pressure, the lower number, is the pressure while your heart rests between beats. Normal blood pressure is below 120/80 mm Hg. However, blood pressure readings can vary depending on age and other factors, so it's important to consult a doctor for personalized advice.
High blood pressure is a common condition that often has no symptoms, so regular check-ups are important. Untreated, it increases the risk of not just stroke, but also heart attack, heart failure, and kidney failure. To lower high blood pressure, doctors may recommend lifestyle changes such as a healthy diet, regular exercise, weight loss, and reducing salt and alcohol intake. In some cases, medication may be prescribed to help manage blood pressure.
While the exact numbers may vary, consistently high blood pressure can lead to a stroke. This is because the force of the blood can damage and weaken the blood vessels, making them more susceptible to blockages or ruptures. Therefore, managing blood pressure is crucial to reducing the risk of stroke.
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A systolic number of 120-129 and a diastolic number below 80 is deemed elevated
Understanding Blood Pressure
Blood pressure is a measure of the force exerted by blood against the walls of arteries as it circulates through the body. It is recorded as two numbers: systolic blood pressure and diastolic blood pressure. Systolic pressure, the upper number, represents the force within the arteries when the heart contracts. On the other hand, diastolic pressure, the lower number, indicates the force of blood when the heart rests between beats.
Normal and Elevated Blood Pressure
Normal blood pressure is generally considered to be below 120/80 mm Hg. However, when the systolic pressure ranges from 120 to 129 while the diastolic pressure remains below 80 mm Hg, this is classified as elevated blood pressure. This elevated range is a crucial indicator, as it signifies that your blood pressure is approaching a level that can significantly increase your risk of experiencing a stroke.
High Blood Pressure and Stroke Risk
High blood pressure, or hypertension, occurs when the force of blood flowing through the blood vessels is consistently too high. This condition can lead to serious health issues, including stroke, heart attack, and kidney failure. Uncontrolled hypertension can damage blood vessels, making them more susceptible to clot formation and rupture. Therefore, managing blood pressure is essential to reduce the risk of stroke.
Preventative Measures
To lower high blood pressure and reduce the risk of stroke, certain lifestyle changes and strategies can be implemented:
- Adopting a heart-healthy diet, such as the Mediterranean diet or the DASH diet, which emphasizes whole grains, fruits, vegetables, and low-fat dairy.
- Engaging in regular physical exercise, aiming for at least 150 minutes per week of moderate-intensity aerobic activity.
- Losing weight if overweight or obese, as this can help manage blood pressure and lower stroke risk.
- Reducing salt and alcohol intake, as excessive consumption can impact blood pressure and overall health.
- Quitting smoking, as tobacco use can temporarily raise blood pressure and cause long-term damage to artery walls.
- Getting sufficient sleep, typically aiming for 7-9 hours of regular sleep per night.
- Managing stress through healthy coping mechanisms.
Medical Attention and Guidance
It is important to consult with a healthcare professional to determine the most appropriate course of action for your specific situation. They may recommend lifestyle changes, prescribe medication, or suggest a combination of both to help manage your blood pressure effectively. Additionally, regular monitoring of blood pressure is crucial, as early detection can enable timely intervention and reduce the risk of stroke.
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Diastolic pressure declines with age
Diastolic blood pressure is the force of blood against the walls of your arteries when your heart is at rest between beats. It is the bottom number in a blood pressure reading. While systolic blood pressure tends to increase with age, diastolic blood pressure declines after age 50. This is because arteries become less elastic with age. If they become too stiff, arteries have a harder time springing back between heartbeats, causing diastolic blood pressure to drop.
Another possible cause of declining diastolic pressure is endothelial dysfunction, a condition where the coronary arteries on the heart's surface constrict instead of opening.
A diastolic blood pressure reading of less than 60 mm Hg is considered low. This can be caused by certain medications or aging. If your diastolic blood pressure is too low, your heart muscles won't get enough oxygenated blood, which can lead to a weakening of the heart, a condition called diastolic heart failure.
Low diastolic blood pressure is a risk factor for new-onset heart failure in older adults. A 2020 study found a link between low diastolic blood pressure and heart damage, including stroke, heart attack, and heart failure.
To manage low diastolic blood pressure, it is recommended to:
- Keep salt intake to around 1,500-2,300 milligrams per day.
- Eat a heart-healthy diet, including fruits, vegetables, whole grains, and lean protein.
- Drink enough fluids and avoid alcohol, which can increase the risk of dehydration.
- Stay physically active.
- Maintain a moderate weight.
- If you smoke, consider quitting.
While high blood pressure is a major risk factor for stroke, low diastolic blood pressure can also be a concern, especially in older adults. Managing blood pressure through lifestyle changes and, if necessary, medication, is important to reduce the risk of stroke and other cardiovascular issues.
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Frequently asked questions
Diastolic blood pressure is the pressure in the arteries when the heart rests between beats. This is the time when the heart fills with blood and gets oxygen.
A healthy diastolic blood pressure is below 80 mm Hg.
Diastolic hypertension is when the diastolic blood pressure reading is 80-89. This is considered Stage 1 hypertension.
A hypertensive crisis is when blood pressure readings exceed 180/120 mm Hg. This requires immediate medical attention.
If you think you are having a hypertensive crisis, call 911 immediately.