SummaryRead the full fact sheet
- There is no single thing that causes heart disease and stroke, but there are several risk factors that contribute to it.
- You can reduce your risk of developing cardiovascular disease (CVD) by choosing healthy foods, quitting smoking, being physically active, managing conditions (such as high cholesterol, high blood pressure, diabetes and depression) managing your weight and avoiding social isolation.
- Medicines are often used to help prevent cardiovascular disease (CVD), depending on your level of risk and other health conditions.
Heart disease, along with stroke and blood vessel disease, belongs to the group of conditions together known as cardiovascular disease (CVD). Cardiovascular disease is a leading cause of death in Australia. 41,849 deaths were attributed to CVD in Australia in 2018.
Cardiovascular disease can occur when arteries that supply blood and oxygen to your heart muscle and other organs (such as the brain and kidneys) become clogged with fatty material called plaque or atheroma. This process is called atherosclerosis. It can start when you are young and be well advanced by the time you reach middle age.
If your arteries become too narrow, less blood can reach your heart muscle or your brain. When this happens in arteries of the heart, it can lead to symptoms such as (chest pain). If a blood clot forms in the narrowed artery and blocks the blood supply to part of your heart, it can cause a . If this happens in the arteries supplying blood to the brain, this can cause a .
Understanding your cardiovascular disease risk score
Risk score puts many of the risk factors together. This is a bit like putting all the pieces of a puzzle together so you can see the whole picture. By looking at the whole picture, your doctor can discuss ways to reduce your risk of or . Risk reduction strategies include medications, surgery and lifestyle changes.
However, if you are already known to be at high risk (for example, if you have had a previous heart attack or stroke, have severe , very or have and are over 60 years old), a risk score will not need to be calculated. Your doctor will tell you if you are in this group and advise you about what to do to reduce your risk.
Heart disease and stroke risk factors
There is no single cause for CVD, but there are risk factors that increase your chance of a heart attack or stroke. There are modifiable factors (ones that you can change) and non-modifiable factors (ones that you can’t change).
Heart disease and stroke risk factors that you can change include:
Social isolation and lack of social support are risk factors for CVD that can be changed, although it can seem challenging. One way to help with loneliness is to learn how to improve your social connections.
Risk factors you can’t change include increasing age, being male, being post-menopausal and having a family history of CVD. Aboriginal and Torres Strait Islander people are also at increased risk of CVD.
The good news is that you can reduce your overall risk of developing CVD by leading a healthy lifestyle and taking medicines as prescribed by your doctor.
Smoking and cardiovascular disease risk
Smoking also makes your artery walls sticky, causing them to become clogged with fatty material called plaque or atheroma. Smokers often have cold hands or feet as a result of clogged arteries, which may also lead to serious problems such as gangrene.
Cholesterol and cardiovascular disease risk
Your total cholesterol includes two types of cholesterol, which are:
- Low-density lipoprotein (LDL) – also known as ‘bad’ cholesterol because it can add to the build-up of plaque in your arteries and increase your risk of heart attack and stroke.
- High-density lipoprotein (HDL) is also known as ‘good’ cholesterol because it helps to protect you against heart attack and stroke.
Most of the total cholesterol in your blood is made up of ‘bad’ LDL cholesterol. Only a small part is made up of ‘good’ HDL cholesterol.
You should aim for low LDL cholesterol and higher HDL cholesterol on advice from your doctor. If you are having trouble with your cholesterol levels, a dietitian can help you to eat healthily for your specific needs.
Blood pressure and cardiovascular disease risk
is the pressure of the blood in your arteries (the blood vessels that carry oxygen and nutrients to your body) as it is pumped around your body by your heart. Blood pressure depends on two main things: the amount of blood pumped by your heart and how easily the blood can flow through your arteries.
Your family history, eating patterns, alcohol intake, weight and level of physical activity have a strong influence on blood pressure. In some people, medicines, including the oral , , steroids (cortisone-like medicines) and arthritis medicines, can also raise blood pressure.
High blood pressure can overload your heart and arteries and speed up the artery-clogging process. This can lead to problems such as heart attack and stroke.
High blood pressure can also affect arteries to other parts of your body, such as the eyes, kidneys and legs.
If high blood pressure is not treated, your heart may weaken because of the constant extra demand. This may cause ‘’, a serious condition with symptoms such as tiredness, shortness of breath and swelling of the feet and ankles.
Diabetes and cardiovascular disease risk
People with diabetes are at greater risk of heart attack, angina and stroke. Similarly, people with CVD are generally prone to diabetes. For people with both diseases, the risk of heart attack and stroke is higher than for those without them.
The reported increase in diabetes in Australia is thought to be associated with more people being physically inactive, unhealthy eating habits and being overweight. The two main types of diabetes are:
- – previously known as insulin-dependent or juvenile-onset diabetes.
- – previously known as non-insulin-dependent or mature-onset diabetes.
If you have diabetes, manage your condition by being physically active, choosing healthy foods and maintaining a healthy weight. You may also need to take medicines to maintain normal blood-glucose levels, as well as making lifestyle changes such as quitting smoking. Manage your health by reducing total cholesterol, monitoring blood pressure and regularly seeing your doctor for diabetes reviews.
Being overweight and cardiovascular disease risk
- High cholesterol.
- Joint problems, such as , and joint pain.
- , such as .
- Certain types of cancer.
Healthy eating and cardiovascular disease risk
To reduce your heart disease risk, follow these heart healthy eating patterns recommended by the Heart Foundation:
- Eat plenty of and .
- Include a variety of – especially fish and seafood, legumes (such as beans and lentils), . Smaller amounts of eggs and lean poultry can also be included in a heart healthy diet. If choosing red meat, make sure the meat is lean and limit to 1-3 times a week.
- Consume . Those with high blood cholesterol should choose reduced fat varieties.
- Make with nuts, seeds, avocados, olives and their oils for cooking.
- Add and spices to flavour foods, instead of adding .
Physical activity and cardiovascular disease risk
- Improve your long-term health.
- Reduce your risk of heart attack.
- Give you more energy.
- Help you to manage your weight.
- Help you to achieve healthier total cholesterol.
- Lower your blood pressure.
- Make your bones and muscles stronger.
- Make you feel more confident, happy and relaxed.
- Help you to sleep better.
If you have had a heart attack, regular physical activity will help you to recover more quickly. If you have diabetes, it will also help you to manage your blood-glucose levels.
Physical activity doesn’t have to be strenuous. Moderate-intensity physical activity, such as brisk walking, is great for your health. It is recommended that you do 30–45 minutes of moderate-intensity physical activity on most, if not all, days of the week. You can do this in smaller bouts, such as three 10-minute walks, if it is easier.
Walking for heart health
- Lower our risk of heart disease, stroke (by 35%) and type 2 diabetes (by 40%).
- Manage weight, blood pressure and cholesterol.
- Reduce our risk of some cancers.
- Maintain bone density – reducing risk of and .
- Improve balance and coordination – reducing your risk of falls and other injuries.
Depression and cardiovascular disease risk
Studies have shown that people with depression, those who are socially isolated or do not have quality social support are at greater risk of developing CVD.
Family history and cardiovascular disease risk
Although having a family history of CVD is a risk factor you can’t change, it does not mean that you will develop it. However, if you do have a family history of CVD, it is important to reduce or remove other risk factors. For example, adopting healthy eating patterns, do not smoke, and lead an active, healthy lifestyle.
Gender, age and cardiovascular disease risk
However, the risk of developing CVD is an important issue for women, especially as they get older. It is not clear why women tend to get CVD at a later age than men, although it is likely that hormonal changes after , combined with changes in their risk factors, play a role.
Despite your gender and age, you can reduce your risk of developing CVD if you follow a healthy lifestyle and take medicines as prescribed by your doctor.