What Are The Causes Of Low Blood Pressure
Low blood pressure may be induced by conditions that decrease tension in artery walls or decrease blood volume. Dehydration and bleeding are two examples of conditions that reduce blood volume. Conditions that reduce the amount of blood pumped by the heart — such as cardiomyopathy and heart attack — may be associated with lower blood pressure. Injuries to the spinal cord and side effects from certain medications can also reduce blood pressure.
What Can I Do For Myself
There are other things you can do for yourself to help with your symptoms.
- Wear supportive elastic stockings . They put extra pressure on your legs which helps to improve circulation and raise your blood pressure. For some people this can be enough, but speak to your GP first because they arent suitable for everyone.
- Stand up slowly from sitting or lying down. You can try other simple movements to get the blood flowing before you stand up, such as straightening and bending your legs.
- Avoid standing for long periods of time.
- Drink enough water throughout the day, around 2 litres, so you dont get dehydrated.
- Eat little and often throughout the day. This avoids low blood pressure after eating.
Read more about how .
When To See Your Gp
You should see your GP if you have frequent symptoms of low blood pressure. Your GP can measure your blood pressure and help identify any underlying causes of the problem.
All adults should have their blood pressure checked at least every five years. If you haven’t had yours measured or don’t know what your reading is, ask your practice nurse or GP to check it.
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Low Blood Pressure After A Massive Heart Attack
A massive heart attack is a life-threatening medical emergency a massive heart with low blood pressure can result in death very quickly without immediate treatment. If you have symptoms of low blood pressure with heart attack symptoms, it is truly the kind of medical emergency where every second counts. You have a very narrow window of opportunity to save your life. If you or your loved ones have these low blood pressure symptoms with a massive heart attack, you need to call 911 right away.
Here are those symptoms:
- Feeling dizzy and lightheaded after one of the following:
- Heavy chest pain in the middle of the chest
- Left arm pain
- Tightness and pressure on your chest
- Left shoulder pain
- Sudden cardiac arrest
Q How Do I Know If I Have Low Blood Pressure
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Medication For Low Blood Pressure
Very few people are prescribed medication for low blood pressure. The symptoms of hypotension can usually be treated by making the above changes to your lifestyle and, in particular, by increasing your fluid and salt intake.
If medication is necessary, it will usually be medicines to expand the volume of your blood or to constrict your arteries. By increasing your blood, or decreasing your arteries, your blood pressure will increase because there will be more blood flowing through a smaller space.
When To Contact A Medical Professional
If low blood pressure causes a person to pass out , seek treatment right away. Or call 911 or the local emergency number. If the person is not breathing or has no pulse, begin CPR.
- Black or maroon stools
Hypotension Blood pressure – low Postprandial hypotension Orthostatic hypotension Neurally mediated hypotension NMH
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What Can You Do To Help Relieve Symptoms Of Low Blood Pressure
Depending on the type of low blood pressure you have, you may be able to relieve some of your symptoms by:
- Eating a healthy diet with fewer carbohydrates and smaller meals.
- Drinking more water and avoiding alcohol.
- Getting up slowly after youve been sitting or lying down.
- Focusing on breathing a few times before you change position.
- Wearing compression stockings.
Natural Medicine For High Blood Pressure
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What Is Blood Pressure
As blood pumps through the circulatory system, it pushes against the walls of the arteries and veins. Blood pressure is the force of the blood as it presses against the blood vessel walls. It is measured in systolic pressure and diastolic pressure .
Blood pressure rises and falls throughout the day. Normal blood pressure is considered to be below 120/80 mm Hg. In a blood pressure reading, the top number refers to systolic pressure, and the bottom number refers to the diastolic pressure.
Low Diastolic Pressure: No Symptoms
“When your systolic blood pressure gets too low, it can manifest as lightheadedness, fainting, and weakness. But low diastolic pressure by itself doesn’t have any symptoms,” says Dr. Paul Conlin, professor of medicine at Harvard Medical School and chief of medicine at the VA Boston Healthcare System.
One of the new studies, which analyzed the medical records of more than 11,000 adults over a period of three decades, found that people who had low diastolic blood pressure were twice as likely to have subtle evidence of heart damage compared with people whose diastolic blood pressure was 80 to 89 mm Hg. Low diastolic values were also linked to a higher risk of heart disease and death from any cause. The findings appeared in the Aug. 30, 2016, Journal of the American College of Cardiology.
Another study, published in The Lancet, involved more than 22,000 people with heart disease, whom researchers grouped according to their blood pressure readings. People with well-controlled blood pressure values were considered the reference group.
Not surprisingly, people with high systolic blood pressure were more likely to experience heart attacks or strokes, be hospitalized with heart failure, or to die compared with people in the reference group. But the same was true for heart attacks, heart failure, and death in people with low blood pressure .
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Serious Injuries And Shock
Low blood pressure can also be caused by serious injuries or burns, particularly if you have lost a lot of blood. This can mean that there is less blood being pumped around your body. Low blood pressure can also occur if you go into shock after having a serious injury.
Other kinds of shock are described below.
Anaphylactic shock, or anaphylaxis, is caused by an allergic reaction to something – for example, a wasp sting or a peanut. During an allergic reaction, your body produces a large amount of a chemical called histamine, which causes your blood vessels to widen and leads to a sudden, severe drop in blood pressure.
Cardiogenic shock occurs when your heart cannot supply enough blood to your body, so your blood pressure drops. This can happen during a heart attack.
Increasing Your Fluid And Salt Intake
Dehydration can cause low blood pressure. This can be easily treated by increasing your fluid and salt intake. Ensuring you drink enough fluid will help by increasing the volume of your blood, which will increase your blood pressure.
If you have low blood pressure, you may benefit from having more salt in your diet. Your doctor will be able to advise how much additional salt you need and whether you can add salt to your usual food or if you need to take salt tablets. Don’t add extra salt to your diet without seeing your doctor first.
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Neurological Causes Of Low Blood Pressure
Proper functioning of the central nervous system is necessary to maintain adequate blood pressure. The vagus nerve and adrenaline system of the body work together to affect blood pressure. When the vagus nerve is overstimulated, veins expand, insufficient blood returns to the heart, and blood pressure may decrease. Vasovagal syncope is a term for a type of fainting that occurs when the vagus nerve is overstimulated. Vasovagal syncope may happen to those who are sensitive to pain or cannot stand the sight of blood. The vagus nerve is overstimulated in these cases and fainting occurs. This type of fainting may even occur when straining to urinate or while having a bowel movement.
In some kinds of spinal cord injury, adrenaline to the arteries is blocked. When this happens, the arteries remain wide open and adequate blood pressure is not maintained.
How Does Blood Pressure Work
During relaxation of the heart , the left ventricle of the heart fills with blood returning from the lungs. The left ventricle then contracts and pumps blood into the arteries . The blood pressure in the arteries during contraction of the ventricle is higher because blood is being actively ejected into the arteries. It is lower during relaxation of the ventricle when no blood is being ejected into the arteries. The pulse we feel when we place our fingers over an artery is caused by the contraction of the left ventricle and the ejection of blood.
Blood pressure is determined by two factors:
Generally, blood pressure tends to be higher if more blood is pumped into the arteries or if the arterioles are narrow and/or stiff. Narrow and/or stiff arterioles, by resisting the flow of blood, increase blood pressure. Arterioles may become narrower when the muscles surrounding them contract. Arterioles may become stiff and narrow when older patients develop atherosclerosis.
Blood pressure tends to be lower if less blood is being pumped into the arteries or if the arterioles are larger and more flexible and, therefore, have less resistance to the flow of blood.
The heart rate increases and the forcefulness of the heart’s contractions increase, pumping more blood through the heart.
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How Can You Prevent Low Blood Pressure
You may be able to prevent hypotension by making changes to your lifestyle and diet, such as:
- Eating fewer carbohydrates and choosing small, healthy meals.
- Staying hydrated and avoiding alcoholic drinks.
- Rising slowly when youve been sitting or lying down.
- Taking a few deep breaths before you change position.
- Wearing compression stockings.
At What Point Does High Blood Pressure Cause A Problem For People With Diabetes
If your resting blood pressure level is above the targets, this puts you at an increased risk of heart and vascular problems as well as other diabetes complications, such as kidney disease and sight damage .
High blood pressure is also associated with poor circulation which increases the risk of foot ulcers and can lead to foot amputation if regular foot care is not taken.
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Frequently Asked Questions About Low Blood Pressure
As long as its not causing any problems, the lower your blood pressure, generally the better. High blood pressure is a risk to your health it can lead to serious conditions such as stroke, coronary heart disease and kidney failure. The lower your blood pressure, the less likely you are to suffer from these problems.
However, if your blood pressure becomes lower than usual for you, it can cause problems. If you have any symptoms like feeling dizzy or faint, you should contact your doctor. See the symptoms sections above for more information.
Why Would My 10 Year Old Have To Take Blood Pressure Medicine
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Low Blood Pressure When You Stand Up
Sometimes, changes in your posture can cause your blood pressure to drop, for example, going from sitting or lying down to standing up. You might feel the symptoms listed above when you stand up, such as feeling dizzy or faint. They will pass quickly as your body adjusts, but can put you at risk of falls.
This is called postural hypotension or orthostatic hypotension. Its caused by changes to your arteries which happen as you get older and if youre taking medications to lower your blood pressure.
The animation below provides information on the causes, symptoms and potential interventions related to orthostatic hypotension.
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Heart Attack And Heart Disease
High blood pressure can damage your arteries by making them less elastic, which decreases the flow of blood and oxygen to your heart and leads to heart disease. In addition, decreased blood flow to the heart can cause:
- Chest pain, also called angina.
- Heart attack, which happens when the blood supply to your heart is blocked and heart muscle begins to die without enough oxygen. The longer the blood flow is blocked, the greater the damage to the heart.
- Heart failure, a condition that means your heart cant pump enough blood and oxygen to your other organs.
What Other Conditions Cause Low Blood Pressure
Sometimes, a bacterial or fungal infection from another part of the body enters the blood. This type of infection is called septicemia. It’s potentially life-threatening and may cause severe low blood pressure called septic shock that may damage organs. Septicemia may result from diverticulitis, pneumonia, urinary tract infection, or other infections.
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