Posts Tagged ‘Nerve Impulses’

 

High Blood Pressure

Thursday, September 24th, 2009
Mitamins Team asked:


Recent estimates have indicated that one in three adults in the USA has high blood pressure and that a third of these people are unaware of their condition. Your blood pressure is quite simply the force of the blood on the artery walls when the heart beats (systolic pressure) and when it rests between beats (diastolic pressure). The normal values are less 120 mm Hg systolic and less 80 mm Hg diastolic. If your blood pressure is 140-159 mm Hg Systolic over 90-99 mm Hg Diastolic then this is classified as High blood pressure or Hypertension.

There are many causes of high blood pressure; in 90-95% of cases the actual cause cannot be discerned. Nerve impulses cause your arteries to dilate (become larger) or contract (become smaller). If these vessels are wide open, blood can flow through easily. If they’re narrow, it’s harder for the blood to flow through them, and the pressure inside them increases. High blood pressure may occur at this point. The remaining cases high blood pressure may be caused by kidney abnormalities, an abnormality of the aorta, the narrowing of certain arteries.

Blood volume also affects blood pressure – the more blood in the body, the higher the amount of blood returning to the heart and the resulting cardiac output and higher the blood pressure. Arteries thickened by fatty tissue increase the resistance of the blood as it flows and this increased the resistance will contribute to higher the blood pressure. Other factors could also affect blood pressure like blood viscosity or stickiness. This is called your triglyceride levels. A raised triglyceride can be caused by a high alcohol or carbohydrate diet, being over weight or having poorly controlled blood sugars.

Keeping fit through a balanced diet and exercise is an important way to decrease high blood pressure. There is a direct link between rising blood pressure or hypertension and being overweight. Exercise improves the condition of the thickened arteries which helps in the treatment of high blood pressure by making the heart stronger. A stronger heart pumps more blood efficiently, which means that the heart doesn’t have to work as hard. However anyone with high blood pressure should consult a doctor before any exercise plan.

Research has also shown some evidence that exercise reduces the release of nor epinephrine, which is a hormone that raises blood pressure by constricting arteries and increasing the heart rate.

Aiming for and maintaining an ideal body weight is really important in the treatment of high blood pressure. If you are overweight or obese, ask your doctor for a referral to a dietitian who can help you make permanent, achievable changes to the way you eat to assist with weight loss.

Cutting down on your alcohol intake, is very important – as this has a significant role in boosting blood pressure. Women should limit their intake to one drink per day and men two. Smoking injures blood vessel walls and accelerates the hardening of the arteries. Although it does not directly cause even though it does not cause high blood pressure, smoking is bad for anyone, especially those with high blood pressure

Dietary changes can really contribute to the treatment of high blood pressure. In studies sponsored by the National Institutes of Health, the DASH (Dietary Approaches to Stop Hypertension) eating plan has been shown to be effective. Essentially this plan involves consuming increased amounts of fruit and vegetables and choosing low-fat or non-fat dairy products. Studies have shown that eating fruits, vegetables, and low-fat dairy food and proteins as well as foods with lower saturated fat, total fat, and cholesterol, lower blood pressure and promote overall fitness. Whole grains, poultry, fish and nuts with lower fat content are good choices for the heart. Details of the DASH diet can be found at: http://www.nhlbi.nih.gov

Foods with large amounts of saturated and trans fats such a fatty cuts of meat, fast food, fries, cakes and cookies should be kept to a minimum. This will also help with limiting the amount of sodium or salt in the diet. You should also try to avoid adding salt in your cooking and at the table, to limit gravy powders, salty soups and seasoning as well as salted crisps and nuts.

So why not have a go at these small changes – they really can make a difference in the treatment of high blood pressure!



Cynthia

 

The Blood Pressure Medication

Monday, August 17th, 2009
Jeremiah Slivka asked:


Have you tried changing your lifestyle to help your blood pressure only to find it isn’t helping very much? Sometimes lifestyle changes alone aren’t as effective as when combined with blood pressure medication.

There are many different kinds of blood pressure medications out there today. Usually two different medications are used rather than one alone. Here are some of the main blood pressure medications:

Alpha-Blockers: This medicine reduces nerve impulses to your blood vessels allowing easier flowing of the blood making your blood pressure decrease.

Alpha-Beta-Blockers: These work just like the alpha-blockers but also slow your heart beat. This means less blood pumps through your vessels making your blood pressure decrease.

Nervous System Inhibitors: This medication relaxes your blood vessels by controlling the nerve impulses making your vessels wider and decreasing blood pressure.

Beta-Blockers: These reduce your nerve impulses to your heart and blood vessels, making your heart beat decrease while dropping your blood pressure.

Diuretics: These are also known as ‘water pills,’ a very common medication. These diuretics work in your kidney, flushing out all excess sodium along with water from your body.

Vasodilators: These open your blood vessels directly by relaxing the muscle in your vessel walls which then causes your blood pressure to decrease.

ACE Inhibitors: ACE stands for ‘Angiotensin converting enzyme.’ These inhibitors prevent a hormone called angiotensin II from forming, which will usually cause your blood vessels to narrow. They help the vessels relax which makes your blood pressure decrease.

Angiotensin Antagonists: These block your blood vessels from angiotensin II. When blocked these vessels can widen letting your blood pressure decrease.

Calcium Channel Blockers: These keep any calcium from entering your heart’s muscle cells and your blood vessels causing your blood pressure to decrease.

An alternate to taking any medication if possible is watching a few lifestyle habits. For instance a healthy diet can help control your blood pressure. Substitute salt for other seasonings and add lots of fresh fruits and vegetables to your diet.

Get at least thirty minutes of physical activity or exercise a day. That doesn’t mean you have to exercise thirty minutes all at once. Ten minutes here and there is just as effective.

Try to keep your stress level at a minimum. High stress can increase your blood pressure so find something that relaxes you and helps you de-stress. Do this whenever you find yourself stressed out beyond your means.

Try to cut back on tobacco use and alcohol consumption. Quitting altogether is more beneficial but isn’t always easy. Remember there are many resources and products available to help you quit either of these habits.

Sometimes these lifestyle changes will not work alone. Your doctor might prescribe you a blood pressure medication if not two. Just talk with your doctor to find out what would be better for you and your blood pressure. Ask any and all questions and if you are taking other medications tell your doctor. Certain medications including oral contraceptives and cold medicines can increase your blood pressure.



Amanda
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