On this page we describe the causes, symptoms, treatment
and most importantly measures you can take to avoid cardiovascular disease.
CardioVascular Disease (CVD) is among the main causes of premature death
in the U.K., it is a term that describes diseases of the heart and blood
vessels. The main forms of CVD are Coronary Heart Disease
(CHD) and stroke. For more information on strokes click
here.
What is coronary heart disease and a heart attack?
Coronary heart disease comes in two main forms: heart attack and angina. The heart is one of the strongest muscles in the
body. It has to be to keep blood pumping every second of your life.
It is essential that your heart, veins and arteries remain in good condition.
Arteries have different names, depending on what
part of the body they supply. The arteries supplying the heart are known
as coronary arteries. When these arteries are affected, the result is
coronary heart disease.
Coronary heart disease results from the coronary
arteries becoming narrowed with fatty deposits on the inside wall. This
narrowing of these arteries reduces the flow of blood to the heart and
increases the chances of a blood clot blocking the artery. The formation
of a blood clot is also known as thrombosis. When one of the blood vessels
becomes completely blocked, the blood supply to part of the heart stops
and is damaged. The results of this are a heart attack or myocardial
infarction to call it by its medical name. If the blood supply to a
large part of the heart is stopped it may cause death.
What causes heart disease to develop?
Heart disease as mentioned earlier is caused by the build
up of fatty deposits on the walls of the arteries. The fatty deposits
that build up on the artery walls takes years to build up and this process
is medically known as, atherosclerosis. The
fatty deposits known as 'plaques' are made up of many substances including
a fatty substance called cholesterol (for
more information on cholesterol click here). If you have
high levels of cholesterol in your blood the fatty deposits will increase,
so you should try to cut down on saturated fats. Butter, margarine,
meat, milk and cakes are all major sources of saturated fats. See below
for further risk factors which can increase the chances of you developing
heart disease.
What are the risk factors for heart disease?
There are a number of things you can do to help
reduce your risk of heart disease, though some factors like age cannot
be changed. These risk factors include:
- High cholesterol - the average diet in the U.K.
is very unhealthy, the consumption of fatty foods is far too high
and the intake of fruit and vegetables is far too low. We have a cholesterol
test on this website for more information or to buy click
here.
- Smoking - this is one of the main factors, which causes heart disease, causing
1 in 5 of all heart disease deaths. Smoking harms your heart because
the chemicals in the cigarette smoke damage arterial linings, leading
to heart disease. It may also encourage thrombosis.
- High
blood pressure.
- Previous heart disease.
- Diabetes .
- Physical inactivity (lack of exercise) - an average
person should aim for at least 30 minutes of moderate exercise on
most days of the week. Physical activity should be introduced gradually
and at appropriate levels for the age and health of the individual.
Regular exercise makes your heart grow stronger, so that it can pump
more blood with each beat.
- Alcohol - heavy drinkers are twice as likely to die of heart disease than
non-drinkers.
- Overweight (more than 20%) - being overweight
is associated with raised blood pressure, high cholesterol and inactivity,
therefore you have an increased risk of heart disease.
- Age - over 45 in men and 55 in women.
- A family history of early heart disease.
- A raised homocysteine level - raised homocysteine levels are thought to damage the lining
of the arteries and may also be a factor in increasing blood clots.
High homocysteine levels may be caused by kidney disease, insufficient folic
acid in your diet, age, lupus and certain medications.
What are the symptoms of heart disease?
As the coronary arteries narrow, patients will often
experience chest pain or tightness, known as angina. This pain
may spread to the left shoulder or arm or to the neck and jaw. The pain
can occur after exercise, a strain, in stressful situations and especially
in the cold weather. Palpitations, when you are aware that you heart
is not beating normally or shortness of breath, when doing light activity,
may also be early symptoms of heart disease. However, some people can
have heart disease without having any noticeable symptoms. If you have
any concerns about heart disease you should consult your doctor for
advice.
What is angina?
Angina is a Latin word meaning chest pain and is
the main symptom of heart disease. People with angina experience frequent
chest pain, which is usually worse after or during exercise as the heart
struggles to get the oxygen it needs. The pain lasts a few minutes and
usually goes away after rest. Angina is the hearts way of saying that
it is not getting enough oxygen. This can be either because the coronary
arteries that supply blood to the heart are blocked or because the heart
is being over worked and needs more oxygen than normal. The pain can
be mistaken for indigestion because the tight, burning sensations are
similar.
What are the symptoms of a heart attack?
A heart attack is more likely to occur between 5am
and 10am and the body is likely to send one or more warning signs of
a heart attack, these include:
- An uncomfortable pressure or pain in the centre
of the chest lasting for more than a few minutes.
- Pain spreading to the shoulders, neck or arms.
The pain may be mild or intense.
- Chest discomfort with dizziness, fainting, sweating, nausea or shortness of breath.
- Anxiety,
nervousness and/or cold sweaty skin.
- An increased or irregular heart rate.
If you believe you are having a heart attack or
have any of the symptoms mentioned you should call 999 immediately.
What can I do to reduce the risks of heart disease?
Heart disease and attacks are common but they’re
not inevitable, there is action you can take to reduce your risk of
developing heart disease. There are many risk factors of heart disease
that are mentioned above and those that can be avoided should be avoided,
try giving up smoking, take up some form of regular exercise, even walking
can be beneficial and eat a healthy
balanced diet. There is also some evidence that women who
take H.R.T.
(Hormone Replacement Therapy) are less likely to suffer a
heart attack.
An aspirin a day can be beneficial in preventing
a heart attack. However, before taking aspirin you should speak to your
doctor to make sure you are okay to take it daily.
How is heart disease diagnosed?
Heart disease is only usually diagnosed when a person
develops symptoms of the disease and unfortunately a heart attack can
be the first sign. If you have symptoms that suggest you mat be suffering
from heart disease your doctor will probably carry out a physical examination
and may arrange for you to have a number of tests. Tests that you may
have include a chest x-ray, electrocardiogram (ECG) or a coronary angiography.
A ECG monitors the heart's electrical activity and records
any problems with the heart's rhythm. An ECG can also tell the doctor
if you have had a previous heart attack or if your heart is enlarged.
You may also have an ECG carried out before, during and after exercise
(usually on a treadmill) as some heart problems only show up when the
heart is working hard, this is known as a stress test.
A coronary angiography is a fine tube that explores the
coronary arteries, it detects if any of the arteries are blocked or
seriously narrowed.
What treatment is available for heart disease?
A diagnosis of heart disease can be quite worrying,
however, there are many treatments and steps you can take to reduce
the risk of you suffering a heart attack. If the heart is not too badly
damaged a change in lifestyle and medication is usually the recommended
treatment. Medication that you may be given include, Beta-blockers,
which reduce the hearts demand for oxygen, nitrates, to lower your blood
pressure or diuretics to increase the flow of urine and help lower blood
pressure.
If damage is severe and/or medications fail to help,
surgery may be necessary. There are two main types of surgery available
angioplasty and a coronary bypass.
A bypass is highly effective in people with heart
disease and angina that’s not widespread. It can improve your ability
to exercise, reduce symptoms and decrease the amount of drugs you need
to take. An angioplasty operation involves a balloon being positioned
into the coronary artery and inflated and deflated to improve the passage
for the flow of blood. It is removed after the operation and the patient
will usually remain awake throughout. If this operation does not work
a bypass may then be needed.
In a bypass operation, a blood vessel, usually taken
from the leg or chest, is grafted onto the blocked artery, bypassing
the blocked area.
It is important to remember that though
the medication and surgery may alleviate your symptoms, they cannot
cure it.
On rare occasions you may be offered a heart transplant,
this is where the heart is removed and replaced with a healthy heart
from a donor. A lung transplant may be carried out at the same time.
Unfortunately there is a shortage of donors which is why heart transplants
are only carried out when heart disease is at an advanced stage.
Is it important to get treatment straight away
after a heart attack?
Most people who suffer a heart attack wait 2 hours
before seeking medical help, they put their chest pain down to indigestion
or expect the pain to go away. Those people who survive a heart attack
are usually left with permanent damage to their heart, this damage occurs
during the first hour of a heart attack.
A heart attack is not a one-time event that just
happens, it usually evolves over 4-6 hours and with each passing minute,
more tissue is deprived of oxygen and deteriorates or dies. This is
why if you believe you may be suffering a heart attack or notice any
of the symptoms mentioned above, you should call 999 immediately.
If you think you are having a heart attack it is
also advised that you take an aspirin (unless you are allergic). An
aspirin makes your blood less likely to clot. If possible chew the aspirin
as this will get it into your system faster.
What happens after a heart attack?
If the blood supply to the heart is cut off severely
or for a long time, the muscle cells suffer irreversible injury and die. Disability or death can be a result
of this, depending on how much muscle is damaged. If a heart attack
affects the bottom of the heart and affects less than 10% this would
be considered a mild attack. If more than 40% of the heart is damaged
death can occur. A heart attack is a signal for you to make some changes
in your lifestyle. Begin to eat a healthy
diet, exercise and if you smoke quit. Talk to your doctor
about how you can live a normal life as soon as possible.
Some people may need to have surgery after a heart
attack, a bypass or angioplasty, whereas others may just need to take
medication, it all depends on how damaged the heart and arteries are.
Facts about heart disease:
- In the U.K. some 275,000 people every year will
have a heart attack and around 120,000 will die, making coronary heart
disease the U.K.’s number one health problem.
- Death rates from coronary heart disease in the
U.K. are among the highest in the world.
- Someone in the U.K. has a heart attack every
2 minutes.
- 1 in 4 men and 1 in 6 women now die from heart disease.
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