What is angina pectoris?
Angina pectoris—or simply angina—is chest pain or discomfort that keeps coming back.
It happens when some part of your heart doesn't get enough blood and oxygen. Angina
can be a symptom of coronary artery disease (CAD). This occurs when arteries that
carry blood to your heart become narrowed and blocked because of atherosclerosis or
a blood clot. It can also occur because of unstable plaques, poor blood flow through
a narrowed heart valve, a decreased pumping function of the heart muscle, as well
as a coronary artery spasm.
There are 2 other forms of angina pectoris. They are:
Variant angina pectoris
(or Prinzmetal's angina)
- Is rare
- Occurs almost only when you are at rest
- Often doesn't follow a period of physical exertion or emotional stress
- Can be very painful and usually occurs between midnight and 8 a.m.
- Is related to spasm of the artery
- Is more common in women
- Can be helped by medicines such as calcium channel blockers. These medicines help
dilate the coronary arteries and prevent spasm.
- A recently discovered type of angina
- People with this condition have chest pain but have no apparent coronary artery blockages
- Doctors have found that the pain results from poor function of tiny blood vessels
nourishing the heart, as well as the arms and legs
- Can be treated with some of the same medicines used for angina pectoris
- Was once called Syndrome X
- Is more common in women
What causes angina pectoris?
Angina pectoris occurs when your heart muscle (myocardium) does not get enough blood
and oxygen for a given level of work. Insufficient blood supply is called ischemia.
Who is at risk for angina pectoris?
Anything that causes your heart muscle to need more blood or oxygen supply can result
in angina. Risk factors include physical activity, emotional stress, extreme cold
and heat, heavy meals, drinking excessive alcohol, and cigarette smoking.
What are the symptoms of angina pectoris?
These are the most common symptoms of angina:
- A pressing, squeezing, or crushing pain, usually in the chest under your breastbone
- Pain may also occur in your upper back, both arms, neck, or ear lobes
- Pain radiating in your arms, shoulders, jaw, neck, or back
- Shortness of breath
- Weakness and fatigue
- Feeling faint
Angina chest pain is usually relieved within a few minutes by resting or by taking
prescribed cardiac medicine, such as nitroglycerin.
An episode of angina means some part of the heart is not getting enough blood supply.
If you have angina, you have an increased risk for a heart attack. Note the pattern
of your symptoms—what causes the chest pain, what it feels like, how long it lasts,
and whether medicine relieves the pain. If angina symptoms change sharply, or if they
happen when you are resting or they start to occur unpredictably, call 911. You may
be having a heart attack. Do not drive yourself to the emergency department.
The symptoms of angina pectoris may look like other medical conditions or problems.
Always see your healthcare provider for a diagnosis.
How is angina pectoris diagnosed?
In addition to a complete medical history and medical exam, your healthcare provider
can often diagnose angina from your symptoms and how and when they occur. Other tests
- Electrocardiogram (ECG). Records the electrical activity of the heart, shows abnormal rhythms (arrhythmias),
and detects heart muscle damage.
- Stress test (usually with ECG; also called treadmill or exercise ECG). Given while you walk on a treadmill or pedal a stationary bike, to monitor your heart's
ability to function when placed under stress such as during exercise. Breathing and
blood pressure rates are also monitored. A stress test may be used to detect coronary
artery disease, or to determine safe levels of exercise after a heart attack or heart
surgery. A special type of stress test uses medicine to stimulate the heart as if
you were exercising.
- Cardiac catheterization. With this procedure, a wire is passed into the coronary arteries. Next a contrast
agent is injected into your artery. X-ray images are taken to locate the narrowing,
blockages, and other abnormalities of specific arteries.
- Cardiac MRI. This test can find the amount of blood flow to the heart muscle. It may not be available
at all medical centers.
- Coronary CT scan. This test looks at the amount of calcium and plaque inside of the blood vessels of
How is angina pectoris treated?
Your healthcare provider will determine specific treatment, based on:
- How old you are
- Your overall health and past health
- How sick you are
- How well you can handle specific medicines, procedures, or therapies
- How long the condition is expected to last
- Your opinion or preference
Your healthcare provider may prescribe medicines if you have angina. The most common
is nitroglycerin, which helps to relieve pain by widening your blood vessels. This
allows more blood flow to your heart muscle and decreases the workload of your heart.
Nitroglycerin may be taken as a long-acting form daily to prevent angina. Or, it may
be taken as a nose spray, or under the tongue when angina occurs.
Don't take sildenafil (for erectile dysfunction) with nitroglycerin. This can cause
a dangerous drop in blood pressure. Talk to your healthcare provider if you are taking
erectile dysfunction medicines before taking nitroglycerin.
Beta-blockers and calcium channel blockers are also used to treat angina.
Your healthcare provider may recommend other medicines to help treat or prevent angina.
What are the complications of angina pectoris?
Angina means that you have coronary artery disease and that some part of your heart
is not getting enough blood supply. If you have angina, you have an increased risk
for a heart attack.
Can angina pectoris be prevented?
Maintaining a healthy lifestyle can help to delay or prevent angina pectoris. A healthy
- A healthy diet
- Physical activity and exercise
- Stress management
- Not smoking or quitting smoking if you do smoke
- Keeping or working toward a healthy weight
- Taking medicines as prescribed
- Treating any related conditions such as high blood pressure, high cholesterol, diabetes,
Living with angina pectoris
If you have angina, note the patterns of your symptoms. For example, pay attention
to what causes your chest pain, what it feels like, how long episodes usually last,
and whether medicine relieves your pain. Call 911 if your angina episode symptoms
change sharply. This is called unstable angina.
It is important to work with your healthcare provider to treat your underlying coronary
artery disease, which causes angina. You need to control your risk factors: high blood
pressure, cigarette smoking, high blood cholesterol levels, lack of exercise, excess
weight, and a diet high in saturated fat. Taking you medicines as your healthcare
provider directs is an important part of living with angina. If your provider prescribes
nitroglycerin, it important that you have it with you at all times and follow his
or her directions for using it whenever you have an episode of angina.
When should I call my healthcare provider?
Call 911 if you have any of the following:
- Angina symptoms change sharply
- Symptoms happen when you are resting
- Symptoms continue after using nitroglycerin
- Symptoms last longer than usual
- Symptoms start to occur unpredictably
You may be having a heart attack. Do not drive yourself to the emergency department.
Call your healthcare provider right away if:
- Your angina symptoms become worse or you notice new symptoms
- You have side effects from your medicines
Key points about angina pectoris
- Angina is chest pain or discomfort that keeps coming back. It happens when some part
of your heart does not get enough blood and oxygen.
- Angina is a symptom of coronary artery disease. This occurs when arteries that carry
blood to your heart become narrowed and blocked because of atherosclerosis or a blood
- Angina can feel like a pressing, squeezing, or crushing pain in the chest under your
breastbone or upper back, both arms, neck, or ear lobes. You may also have shortness
of breath, weakness, or fatigue
- Nitroglycerin is the most common medicine prescribe for angina
- Managing angina includes managing high blood pressure, stopping cigarette smoking,
reducing high blood cholesterol levels, eating less saturated fat, exercising, and
Tips to help you get the most from a visit to your healthcare provider:
- Know the reason for your visit and what you want to happen.
- Before your visit, write down questions you want answered.
- Bring someone with you to help you ask questions and remember what your provider tells
- At the visit, write down the name of a new diagnosis, and any new medicines, treatments,
or tests. Also write down any new instructions your provider gives you.
- Know why a new medicine or treatment is prescribed, and how it will help you. Also
know what the side effects are.
- Ask if your condition can be treated in other ways.
- Know why a test or procedure is recommended and what the results could mean.
- Know what to expect if you do not take the medicine or have the test or procedure.
- If you have a follow-up appointment, write down the date, time, and purpose for that
- Know how you can contact your provider if you have questions.