Bp equation
What is the formula for BP?
The blood pressure is usually written as the systolic pressure over the diastolic pressure (e.g., 120/80 mm Hg). The minimum acceptable blood pressure is determined by adequate perfusion of the vital organs without symptoms of hypotension.
How is cardiac output related to BP?
Cardiac output can be calculated by the stroke volume multiplied by the heart rate. Any factor that causes cardiac output to increase, by elevating heart rate or stroke volume or both, will elevate blood pressure and promote blood flow.
How do you calculate blood pressure by age?
Blood pressure is NOT the same as your heart rate (pulse) or maximum heart rate. You can check what your heart rate for your age should be. Calculate your predicted maximum heart rate by using the calculation: 220 – (age) = Age Predicted Maximum Heart Rate – or see our Target Heart Rate Calculator and Chart.
What is a BP?
Blood pressure (BP) is the pressure of circulating blood against the walls of blood vessels. Normal resting blood pressure, in an adult is approximately 120 millimetres of mercury (16 kPa) systolic over 80 millimetres of mercury (11 kPa) diastolic, denoted as “120/80 mmHg”.
What two factors determine BP?
Blood pressure increases with increased cardiac output, peripheral vascular resistance, volume of blood, viscosity of blood and rigidity of vessel walls. Blood pressure decreases with decreased cardiac output, peripheral vascular resistance, volume of blood, viscosity of blood and elasticity of vessel walls.
What is MAP formula?
Mean arterial pressure (MAP) [1, 2] = [systolic blood pressure + (2 X diastolic blood pressure)] / 3. The reference range is 70-100 mm Hg.
What are the reasons for high BP?
What causes high blood pressure?A diet high in salt, fat, and/or cholesterol.Chronic conditions such as kidney and hormone problems, diabetes, and high cholesterol.Family history, especially if your parents or other close relatives have high blood pressure.Lack of physical activity.
Does age affect blood pressure?
“As you age, the vascular system changes. This includes your heart and blood vessels. In the blood vessels, there’s a reduction in elastic tissue in your arteries, causing them to become stiffer and less compliant. As a result, your blood pressure increases,” Nakano said.
What things affect blood pressure?
The exact causes of high blood pressure are not known, but several things may play a role, including:Smoking.Being overweight or obese.Lack of physical activity.Too much salt in the diet.Too much alcohol consumption (more than 1 to 2 drinks per day)Stress.Older age.Genetics.
Is 150 90 A good blood pressure?
As a general guide: high blood pressure is considered to be 140/90mmHg or higher (or 150/90mmHg or higher if you’re over the age of 80) ideal blood pressure is usually considered to be between 90/60mmHg and 120/80mmHg.
What is normal BP ratio?
A blood pressure reading has a top number (systolic) and bottom number (diastolic). Normal blood pressure is less than 120 over 80 (120/80).
What is average BP for age?
Table 5.1: Estimated Normal Blood Pressure for Age
| Age | Normal Systolic Range | Normal Diastolic Range |
|---|---|---|
| Adolescent (14–18 years) | 90–120 mm Hg | 50–80 mm Hg |
| Adult (19–40 years) | 95–135 mm Hg | 60–80 mm Hg |
| Adult (41–60 years) | 110–145 mm Hg | 70–90 mm Hg |
| Older adult (61 and older) | 95–145 mm Hg | 70–90 mm Hg |
What is the minimum BP in human body?
A blood pressure reading lower than 90 millimeters of mercury (mm Hg) for the top number (systolic) or 60 mm Hg for the bottom number (diastolic) is generally considered low blood pressure.
What time period is BP?
Before Present (BP) years is a time scale used mainly in archaeology, geology, and other scientific disciplines to specify when events occurred before the origin of practical radiocarbon dating in the 1950s.