Normal blood pressure is important for life. Without the pressure forcing our blood to flow around the circulatory system, no oxygen or nutrients would get through our arteries to tissues and organs.
However, blood pressure can become dangerously high and also get too low.
In this article, we will discuss what blood pressure is, how it is measured, and what these measurements mean for you. health.
Blood pressure is what allows oxygen and nutrients to move through our circulatory system.
Blood pressure is the force that moves blood through our circulatory system.
This is an important force because oxygen and nutrients nutrients would not be pushed around our circulatory system to nourish tissues and organs without blood pressure.
Blood pressure is also important because it supplies white blood cells and antibodies for immunity, and hormones like insulin.
Just as important as the delivery of oxygen and nutrients, the supplied fresh blood is capable of absorbing the toxic waste products of metabolism, including the carbon dioxide we exhale with each breath and the toxins that we excrete through the liver and kidneys.
Blood itself carries a number of other properties, including its temperature. It also carries one of our defenses against tissue damage, the clotting platelets that prevent blood loss after injury.
But what exactly causes blood pressure in our arteries? Part of the answer is simple – the heart generates blood pressure by pushing blood out as it contracts with each heartbeat. However, blood pressure cannot be generated only by the pumping heart.
The National Institutes of HealthTrusted Source cites normal blood pressure as less than 120 mm Hg systolic and 80 mm Hg diastolic.
However, blood pressure changes naturally, a fact that cardiologists discovered when writing about blood pressure changes in NatureTrusted Source in March 2013:
“Blood pressure is characterized by pronounced short-term fluctuations that occur over a 24-hour period (beat, minute, hourly, and day-to-night changes) and also long-term changes—term fluctuations that occur. occur over longer periods of time (days, weeks, months, seasons, and even years). “
Reliable source state that for blood pressure above 115/75 mm Hg, every 20/10 mm Hg increase doubles the risk of cardiovascular disease.
Since 2017, the American Heart Association (AHA) has advised that people with high blood pressure should receive treatment at 130/80 mm Hg instead of 140/90 mm Hg.
They also removed the “pre-hypertension” category between 120-139/80-89 mm Hg. A blood pressure reading of 140/90 mm Hg is now considered stage II hypertension not stage I as it used to be.
This category currently forms two distinct ranges:
- Increased blood pressure, between 120-129 / less than 80 mm Hg
- Stage I hypertension, 130-139 / 80-89 mm Hg
In these new guidelines, the AHA also recommends that doctors only prescribe the drug in the event of a previous heart attack or stroke, or when risk factors for these conditions, such as age, are present. Diagnosing diabetes mellitus , or chronic kidney disease.
Instead, treatment in the earlier stages is primarily through lifestyle changes.
Our circulatory system is similar to a very complex form of plumbing – blood has a “flow” and arteries a “pipe”. A fundamental law of physics creates our blood flow, and the same law applies in a garden water pipe.
Blood flows in our body due to the difference in pressure.
Our blood pressure is highest at the beginning of the journey from the heart – when entering the aorta – and lowest at the end of the journey along the descending arterial branches. That pressure difference is what causes blood to flow around our bodies.
Arteries affect blood pressure in much the same way that the physical properties of a garden hose affect water pressure. Fixing the pipe increases the pressure at the tightening point.
For example, without the elastic properties of the artery walls, the pressure of the blood would drop more rapidly as it was pumped from the heart.
While the heart generates maximum pressure, the properties of the arteries are equally important for maintaining it and allowing blood to flow throughout the body.
The condition of the arteries affects blood pressure and flow, and narrowing of the arteries can eventually block the supply completely, leading to dangerous conditions including stroke and heart attack.
Measurement of normal blood pressure
The instrument used to measure blood pressure is a sphygmomanometer, which consists of a rubber band – a cuff that is inflated by hand or by a pump.
The reading is expressed as the pressure required to move mercury around a tube relative to gravity. This is why pressure is measured in millimeters of mercury, abbreviated as mm Hg.
The stethoscope determines the exact point when the pulse sound returns and the pressure of the cuff is slowly released. Using a stethoscope allows the sphygmomanometer to hear two specific points.
Blood pressure readings include two numbers – the first systolic pressure and the second diastolic pressure. For example, the reading given is 140 per 90 mm Hg.
Systolic blood pressure is the higher number caused by the heart’s contraction, while the diastolic number is the lower pressure in the arteries, during the short ‘rest’ periods between heartbeats.
The guidelines for doctorsTrusted Source list the following measures patients can take to help keep a healthy blood pressure:
- Maintain a healthy body weight.
- Eat a diet rich in fruits, vegetables, and low-fat dairy products.
- Cut down on sodium, or salt, in your diet.
- Get regular aerobic exercise, such as brisk walking, at least 30 minutes a day, most days of the week.
- Drink alcohol in moderation. Men should drink less than two alcoholic beverages per day. Women and men with lower body weight should drink up to one drink per day.
Taking these steps can reduce the risk of health problems further down the line
Taking these steps can reduce your risk of further health problems.
Originally posted 2021-10-27 11:59:52.