Today is World Heart Day, a day set aside to look into issues concerning that very critical organ of the body - the heart. Here, we look at smoking and cholesterol and their effect on the heart.
Smoking is very bad for your heart. It greatly increases the risk of a heart attack, other types of heart disease and stroke.
The good news is that once you stop smoking, the extra risk is reduced quickly.
Smoking affects the vessels that supply blood to your heart and other
parts of your body. It reduces the amount of oxygen in your blood and
damages blood vessel walls.
Breathing in other people's smoke can also increase your risk of heart disease.
You can get lots of help to quit. Talk to your doctor or health practitioner about giving up smoking.
Cholesterol is fatty substance that’s carried around your body with
your blood. Your body produces some cholesterol naturally, and you can
also get it from some foods.
Having high levels of cholesterol in your blood is a risk factor for
heart disease, so it’s important to manage your cholesterol.
There are 2 different types of cholesterol:
- High density lipoprotein (HDL cholesterol) is called the ‘good
cholesterol’ because it helps to keep cholesterol from building up in
your arteries.
- Low density lipoprotein (LDL cholesterol) is called the ‘bad
cholesterol’ because it is the main source of cholesterol build-up and
blockage in your arteries.
You may see them listed as HDL-C and LDL-C on your blood test results.
Total cholesterol is a reading of your good and bad cholesterol.
Triglycerides are another form of fat in your blood that can also raise the risk of heart disease.
When there is too much cholesterol in your blood, it builds up in the walls of your arteries (plaque).
Over time, this build up causes ‘hardening of the arteries’ – your
arteries become narrowed and blood flow to the heart is slowed down or
blocked. You may suffer chest pain and a heart attack.
A variety of lifestyle choices can affect blood cholesterol levels. These are things you can do something about:
- Diet: Eating foods high in saturated fat and trans
fat make your blood cholesterol level go up. Cholesterol in foods also
has a small effect. Reducing the amount of saturated fat, trans fat and
cholesterol in your diet helps lower your blood cholesterol level. High
triglycerides result from eating food high in fat and kilojoules.
- Weight: Being overweight is a risk factor for
heart disease. It also tends to increase your cholesterol. Losing weight
can help lower your LDL and total cholesterol levels, as well as raise
your HDL and lower your triglycerides.
- Physical activity: Not being physically active is a
risk factor for heart disease. Regular exercise can help lower LDL
cholesterol and raise HDL cholesterol levels.
- Smoking: High triglycerides result from tobacco smoking as well as diet.
There are some lifestyle factors that can affect cholesterol levels that you can’t do anything about:
- Age and gender: As you get older, your cholesterol
levels rise. Before menopause, women have lower total cholesterol
levels than men of the same age. After menopause, women's LDL levels
tend to rise.
- Your family history: High cholesterol can run in families. Your genes partly determine how much cholesterol your body makes. For example, familial hypercholesterolaemia
(FH) is an inherited condition where your body doesn’t remove enough
cholesterol from your blood. If you think you may be at risk of familial
hypercholesterolaemia, talk to your doctor.
Symptoms
You can have high cholesterol and feel well. So it’s important to get your cholesterol checked regularly.
Diagnosis
The best way to find out your cholesterol levels is to have them checked by your doctor. This involves a blood test.
Generally we aim for lower LDL (bad) cholesterol and triglycerides, and higher HDL (good) cholesterol.
It’s best to talk to your doctor about what your blood cholesterol
levels should be. They will tell you if your cholesterol levels are too
high.
Reaching healthy cholesterol levels
Talk to your doctor about the best way to achieve a healthy total cholesterol combination of HDL, LDL and triglycerides.
Lifestyle changes
Your doctor may tell you that the best way to manage your cholesterol
is to make some changes like eating less saturated fats and more
healthy food, or they may ask you to see a dietician.
Lifestyle changes can make a big difference. For many people,
changing what they eat and drink is enough to lower their cholesterol.
Find out more about what you can do to help your cholesterol.
Medicines
Lifestyle changes are not enough for some people. Your doctor may
also prescribe medicines to help control your blood cholesterol. Make
sure you take it as prescribed and get your cholesterol levels checked
regularly. It’s also important to continue with healthy lifestyle
choices.
Blood pressure is the pressure of your blood on the walls of your
arteries as your heart pumps it around your body. It’s a vital part of
how your heart and circulation works.
Your blood pressure naturally goes up and down all the time,
adjusting to your heart’s needs depending on what you are doing. High
blood pressure is when your blood pressure is persistently higher than
normal.
A blood pressure reading under 120/80mmHg is considered optimal.
Readings over 120/80mmHg and up to 139/89mmHg are in the normal to high
normal range.
Blood pressure that’s high over a long time is one of the main risk
factors for heart disease. As you get older, the chances of having
persistently high blood pressure increases.
It’s very important to get your blood pressure checked regularly, and
if it’s persistently high it needs to be controlled. Uncontrolled high
blood pressure can lead to a heart attack or stroke. It may also affect
your kidneys.
The medical name for high blood pressure over a long period of time is hypertension.
Causes
The exact causes of high blood pressure are often not clear. Your blood pressure may be strongly influenced by:
Some medicines can also raise blood pressure.
Symptoms
You can’t feel high blood pressure. There are usually no warning
signs, so you can have it and not know. That’s why it’s important to get
it checked.
Diagnosis
The best way to know if you have high blood pressure is to have your
blood pressure checked by your doctor or health practitioner.
They will take your blood pressure using an inflatable bag (cuff)
that goes around your arm. It’s joined to a device that measures the
pressure.
Blood pressure can vary at different times of the day. Sometimes it
can even go up just because someone is taking it, so it’s important to
have an accurate measure of your blood pressure. Talk to your doctor or
health practitioner about what your blood pressure level should be.
Controlling high blood pressure
If you have high blood pressure, talk to your doctor about the best way to control it.
Lifestyle changes
Your doctor may recommend that you make some healthier lifestyle
choices, like changing the food you eat or getting more exercise.