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Cardiovascular Risk Assessment

Cardiovascular Health Risk Assessment

UK guidelines recommend that all people aged 40 or more should have a routine cardiovascular risk assessment. A risk factor calculator is commonly used by doctors and nurses to assess the risk of you developing a cardiovascular disease such as: heart attack, angina, stroke, and peripheral vascular disease. Treatment is recommended if you have a high risk.

What are cardiovascular diseases?

Cardiovascular diseases are diseases of the heart or blood vessels that are caused by atheroma. Patches of atheroma are like small fatty lumps that develop within the inside lining of arteries (blood vessels). Atheroma is also known as hardening of the arteries. A patch of atheroma makes an artery narrower, which can reduce the blood flow through the artery. Sometimes blood clots form over a patch of atheroma. Depending on the site of the atheroma the diseases that it causes include heart attack, angina, stroke, and peripheral vascular disease.

Who should have their cardiovascular health risk assessed?

  • All adults aged 40 or more.
  • Adults of any age who have:
    • A strong family history of an early cardiovascular disease. This means if you have a father or brother who developed heart disease or a stroke before they were aged 55, or in a mother or sister before they were aged 65.
    • A first-degree relative (parent, brother, sister, child) with a serious hereditary lipid disorder. For example, familial hypercholesterolaemia or familial combined hyperlipidaemia. These diseases are uncommon.

If you already have a cardiovascular disease or diabetes then your risk does not need to be assessed. This is because you are already known to be in the high-risk group.

What does the screening involve?

A doctor or nurse will ask if you have any current lifestyle risk factors that increase your risk of developing a cardiovascular disease. These include: smoking, obesity, a poor diet, lack of physical activity, and drinking a lot of alcohol. You will then have a blood test to check your blood cholesterol and glucose (sugar) level. Your blood pressure will be measured. A score is calculated based on several of these risk factors, your age and sex. An adjustment to the score is made for certain other risk factors such as strong family history and ethnic origin.

The calculators are evolving all the time. The one which has been used for a long time is called Framingham but many health professionals are moving over to QRISK®2 which is more accurate and takes into account many other factors such as whether you have a condition called atrial fibrillation, or kidney disease. The QRISK®2 calculator can be found online at www.qrisk.org.

What does the assessment score mean?

You are given a score as a % chance. So, for example, if your score is 30% this means that you have a 30% chance of developing a cardiovascular disease within the next 10 years. This is the same as saying a 30 in 100 chance (or a 3 in 10 chance). In other words, in this example, 3 in 10 people with the same risk factors that you have will develop a cardiovascular disease within the next 10 years. Note: the score cannot say if you will be one of the three. It cannot predict what will happen to each individual person. It just gives you the odds. You are said to have a:

  • High risk - if your score is 20% or more. (That is, a 2 in 10 chance or more of developing a cardiovascular disease within the next 10 years.)
  • Moderate risk - if your score is 10-20% (between 1 in 10 and 2 in 10 chance).
  • Low risk - if your score is less than 10% (less than a 1 in 10 chance).

Who should be treated to reduce their cardiovascular health risk?

Treatment to reduce the risk of developing a cardiovascular disease is usually offered to people with a high risk. That is:

  • People with a risk assessment score of 20% or more. That is, if you have a 2 in 10 chance or more of developing a cardiovascular disease within the next 10 years.
  • People with an existing cardiovascular disease (to lower the chance of it getting worse, or of developing a further disease).
  • People with diabetes. If you have diabetes, the time that treatment is started to reduce cardiovascular risk depends on factors such as: your age, how long you have had diabetes, your blood pressure, and if you have any complications of diabetes.
  • People with certain kidney disorders.

What treatments are available to reduce the risk?

If you are at high risk

If you are at high risk of developing a cardiovascular disease then drug treatment is usually advised along with advice to tackle any lifestyle issues. This usually means:

  • Drug treatment to lower your cholesterol level, usually with a statin drug. No matter what your current cholesterol level, drug treatment is advised. See leaflet called 'Cholesterol' for details.
  • Drug treatment to lower blood pressure if your blood pressure is high. This is even if your blood pressure is just mildly high. See leaflet called 'High Blood Pressure (Hypertension)' for details.
  • Where relevant, to encourage you to tackle lifestyle risk factors. This means to:
    • Stop smoking if you smoke.
    • Eat a healthy diet.
    • Keep your weight and waist in check.
    • Take regular physical activity.
    • Cut back if you drink a lot of alcohol.
    You may be offered a referral to specialist services. For example, to a dietician to help you to lose weight and eat a healthy diet, to a specialist stop smoking clinic, or to a supervised exercise programme.

What if I am at moderate or low risk?

If you are not in the high-risk category, it does not mean you have no risk - just a lesser risk. Drug treatment is not usually prescribed. However, you may be able to reduce whatever risk you do have even further by any relevant changes in lifestyle (as described in the above paragraph).

Some people with a moderate risk buy a low-dose statin drug from a pharmacy to lower their cholesterol level. (Statin drugs are available on prescription and funded by the NHS if your risk is high. However, you need to buy them if your risk is not in the high category.) But, if you do buy a statin and take it regularly, it is best to let your doctor know so that it can be put on your medical record.



 
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