Difference Between Systolic and Diastolic Pressure: Why Both Blood Pressure Numbers Are Important

The difference between systolic and diastolic pressure is that systolic pressure measures arterial pressure when the heart contracts, while diastolic pressure measures pressure when the heart relaxes between beats.

Blood pressure is a vital measurement of heart health and consists of two important values: systolic blood pressure and diastolic blood pressure. Systolic pressure is the first number in a blood pressure reading, while diastolic pressure is the second number.

The difference between systolic and diastolic pressure is known as pulse pressure, which can provide important insights into cardiovascular health and arterial function. For a healthy adult, normal blood pressure is generally below 120/80 mm Hg.

Clinicians may prescribe blood pressure medication when lifestyle changes are not enough, or when blood pressure readings remain consistently high. Both systolic and diastolic blood pressure readings are important for diagnosing and managing hypertension.

According to the American Heart Association, nearly half of American adults in the total population have high blood pressure, and it can often be treated with lifestyle changes and blood pressure medication. This post will discuss the importance of both systolic and diastolic blood pressure.

At MyDiagnostics, we believe that regular blood pressure monitoring and preventive health checkups are essential for maintaining long-term cardiovascular health. Early detection of abnormal blood pressure can help reduce the risk of serious complications such as stroke, heart disease, and kidney disorders.

Systolic blood pressure is the top, or systolic number, in a blood pressure reading. For example, if your blood pressure is 140/80 mm Hg, 140 is called the systolic pressure. So, systolic blood pressure is always higher than the diastolic blood pressure.

During each heartbeat, the heart pumps blood into the arteries, creating pressure against the artery walls. Systolic blood pressure is the specific measure of the pressure within the arteries. This phase is known as systole, where the blood pressure is the highest.

Below the systolic blood pressure reading of 120 mm Hg is considered normal blood pressure. Systolic pressure below 90 mm Hg is considered low blood pressure and may require medical assistance.

If you get multiple systolic pressure readings above 180 mmHg, it is considered dangerously high blood pressure. This condition also requires medical assistance.

Isolated systolic hypertension becomes more common with age as arteries stiffen and often needs medical management. High systolic pressure is a major risk factor for heart disease, while elevated diastolic pressure is more often used to diagnose hypertension in younger adults.

When a person exercises or feels stressed, the heart muscle pushes out the blood with high pressure. With this condition, the systolic pressure goes up. In these cases, the high blood pressure is normal. But if your blood pressure is high when you rest, that is not normal, and it's considered severely high blood pressure.

As your blood pressure can go up when you are active, it's important to check your blood pressure when you rest to diagnose high blood pressure accurately. High systolic blood pressure is usually caused by the stiffening of the arteries. This condition makes the heart work harder to push blood through the arteries.

In the high systolic blood pressure range, different stages include:

• Systolic blood pressure of 130 to 139 is stage 1 hypertension that may be reversed with temporary medicines and lifestyle changes.

• Systolic blood pressure of 140 or higher is Stage 2 hypertension that can increase the risk of heart attack or stroke. In this condition, you may need to continue medications for longer.

• A systolic blood pressure of 180 or higher is a hypertensive crisis that requires immediate medical attention.

If you have high systolic blood pressure, consult your physician promptly to seek appropriate medical guidance.

The heart takes a rest between every beat to refill the blood, and this pause between beats is known as diastole. The lower blood pressure number measured during this resting phase is called diastolic pressure.

In healthy adults, normal diastolic blood pressure is generally below 80 mm Hg. If you have high blood pressure, the diastolic pressure will be higher than the normal range.

During diastole, clinicians look at the diastolic reading to understand the pressure in your arteries between beats. Diastolic blood pressure is considered extremely low when it is 60 mm Hg or lower than this.

Low diastolic blood pressure is a common case in people with dehydration or severe bleeding. It also may happen if your arteries relax and widen. Multiple stages of high diastolic blood pressure include;

• A diastolic blood pressure of 80 to 89 is Stage 1 hypertension that can be treated with temporary medicines and lifestyle changes.

• A diastolic blood pressure of 90 or higher is Stage 2 hypertension that increases the risk of stroke or heart attack.

• A diastolic blood pressure of 120 or higher is a hypertensive crisis. This condition requires medical attention.

Persistently high diastolic numbers can signal blood-vessel damage and may guide treatment decisions.

High systolic pressure is often associated with arterial stiffness, stroke risk, and increased cardiovascular mortality. Elevated diastolic pressure may reflect increased peripheral resistance in blood vessels and can contribute to hypertension and vascular damage.

The difference between systolic and diastolic pressure, known as pulse pressure, may also help identify arterial ageing and cardiovascular disease risk.

Blood pressure measurement is very significant to monitor your health status. Blood pressure that is very low or high can cause various symptoms and increase various risk factors for your health.

When the heart beats, it passes the blood through the arteries and travels throughout the body. However, it is not a steady stream. The amount of pressure that the blood exerts changes from moment to moment. It is highest during the systolic pressure and lowest during the diastolic pressure.

Both systolic and diastolic readings play important roles in assessing cardiovascular health. If the reading is very high, you have high blood pressure, which can lead to serious health problems.

If the reading is very low, you may not have sufficient blood flow in your body, and both diastolic and systolic readings can point to health problems.

Besides, if you notice a wide gap between the two measurements, that difference is called pulse pressure, and a widening gap can reflect arterial stiffness and a higher risk.

We must say that your systolic and diastolic blood pressures are both equally important. If the reading is very high, you have high blood pressure. If the reading is very low, you may not have sufficient blood flow in your body. Besides, if you notice severe difference between the two blood pressure measurements, there may be a heart condition or other health problem.

If you want to understand the difference between systolic and diastolic blood pressure, you can consider the following points.

• Systolic blood pressure is the force when the heart contracts and pushes blood into the arteries. Diastolic pressure is the force when the heart relaxes between the beats.

• Systolic blood pressure is the higher number and the first number in blood pressure readings, while diastolic blood pressure is the lower number and the second number. For a reading of 120/80 mm Hg, 120 is the systolic pressure, and 80 is the diastolic pressure.

• Systolic pressure reflects the heart’s effort to pump blood, while diastolic pressure shows the heart’s rest phase.

• High systolic pressure is linked to stroke, heart strain, and kidney issues. Diastolic pressure, on the other hand, is associated with kidney issues and the risk of heart disease.

• High systolic pressure is commonly associated with arterial stiffness, ageing, and increased cardiovascular risk.

• Systolic pressure rises with age, while diastolic pressure decreases after the age of 50, and in some older adults, only the systolic value may remain high.

• Hopefully, these factors will help you understand the difference between systolic and diastolic blood pressure, and a healthy diet, regular exercise, a healthy weight, and quitting smoking can make a big difference in controlling it.

Blood pressure is the measurement of the pressure in the arteries during the beating and resting periods of the heart. Uncontrolled high blood pressure can lead to serious problems such as heart failure or kidney disease.

Clinicians may prescribe blood pressure medication when lifestyle changes are not enough, or readings are very high. Both measurements of systolic and diastolic blood pressure are important for diagnosis and managing high blood pressure.

At MyDiagnostics, we offer reliable diagnostic services and preventive health checkups to help you monitor your blood pressure and maintain better heart health. Schedule your health screening today and take a proactive step toward a healthier future.

Both of these measurements are important to know your health condition, including severe blood loss or heart disease. It’s important to get an accurate blood pressure reading to get the proper treatment as well.

** Medical Disclaimer - The following information is for educational purposes only. No information provided on this website, including text, graphic, and images, are intended as substitutes for professional medical advice. Please consult with your doctor about specific medical advice pertaining to your condition(s).