What is unstable angina?
Angina is another word for heart-related chest pain. You may also feel pain in other parts of your body, such as:
There are two types of angina: stable and unstable.
Stable angina occurs predictably. It happens when you exert yourself physically or feel considerable stress. Stable angina doesn’t typically change in frequency and it doesn’t worsen over time.
Unstable angina is chest pain that occurs at rest or with exertion or stress. The pain worsens in frequency and severity. Unstable angina means that blockages in the arteries supplying your heart with blood and oxygen have reached a critical level.
An attack of unstable angina is an emergency and you should seek immediate medical treatment. If left untreated, unstable angina can lead to heart attack, heart failure, or arrhythmias (irregular heart rhythms). These can be life-threatening conditions.
- shoulders
- neck
- back
- arms
There are two types of angina: stable and unstable.
Stable angina occurs predictably. It happens when you exert yourself physically or feel considerable stress. Stable angina doesn’t typically change in frequency and it doesn’t worsen over time.
Unstable angina is chest pain that occurs at rest or with exertion or stress. The pain worsens in frequency and severity. Unstable angina means that blockages in the arteries supplying your heart with blood and oxygen have reached a critical level.
An attack of unstable angina is an emergency and you should seek immediate medical treatment. If left untreated, unstable angina can lead to heart attack, heart failure, or arrhythmias (irregular heart rhythms). These can be life-threatening conditions.
Causes
What causes unstable angina?
The principal cause of unstable angina is coronary heart disease
caused by a buildup of plaque along the walls of your arteries. The
plaque causes your arteries to narrow and become rigid. This reduces the
blood flow to your heart muscle. When the heart muscle doesn’t have
enough blood and oxygen, you feel chest pain.
Risk factors
Who is at risk for unstable angina?
Risk factors for coronary heart disease include:
- diabetes
- obesity
- a family history of heart disease
- high blood pressure
- high low-density lipoprotein (LDL) cholesterol
- low high-density lipoprotein (HDL) cholesterol
- being male
- using any form of tobacco
- leading a sedentary lifestyle
Symptoms
What are the symptoms of unstable angina?
The main symptom of angina is chest discomfort or pain. The sensation can vary depending on the person.
Angina symptoms include:
Angina symptoms include:
- chest pain that feels crushing, pressure-like, squeezing, or sharp
- pain that radiates to your upper extremities (usually on the left side) or back
- nausea
- anxiety
- sweating
- shortness of breath
- dizziness
- unexplained fatigue
Diagnosis
How is unstable angina diagnosed?
You doctor will perform a physical exam that includes checking
your blood pressure. They may use other tests to confirm unstable
angina, such as:
- blood tests, to check for creatine kinase and cardiac biomarkers (troponin) that leak from your heart muscle if it’s been damaged
- electrocardiogram, to see patterns in your heartbeats that may indicate reduced blood flow
- echocardiography, to produce images of your heart that reveal evidence of blood flow problems
- stress tests, to cause your heart to work harder and make angina easier to detect
- computed tomography angiography
- coronary angiography and heart catheterization, to study the health and caliber of your arteries
Treatment
How is unstable angina treated?
Treatment for unstable angina depends on the severity of your condition.
In severe instances, you may need heart bypass surgery. This procedure reroutes blood flow away from a blocked artery to help improve blood flow to your heart.
Medication
One of the first treatments your doctor may recommend is a blood thinner, such as aspirin, heparin, or clopidogrel. When your blood isn’t as thick, it can flow more freely through your arteries.
may use other medications to reduce angina symptoms, including drugs that reduce:- blood pressure
- cholesterol levels
- anxiety
- arrhythmia symptoms
Surgery
If you have a blockage or severe narrowing in an artery, your doctor may recommend more invasive procedures. These include angioplasty, where they open up an artery that was previously blocked. Your doctor also may insert a small tube known as a stent to keep your artery open.In severe instances, you may need heart bypass surgery. This procedure reroutes blood flow away from a blocked artery to help improve blood flow to your heart.
Lifestyle changes
No matter the severity of your condition, you may need to change your long-term lifestyle. Lifestyle changes that can improve your heart health include:- eating a healthier diet
- lowering your stress
- exercising more
- losing weight if you are overweight
- quitting smoking if you currently smoke
Prevention
How can I prevent unstable angina?
Nonmedical self-care options include taking steps to lose weight,
giving up tobacco use, and exercising more regularly. Working toward a
healthier lifestyle can improve your heart health and reduce your risk
of future unstable angina episodes.
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