Angina

What is angina?

Angina, also called angina pectoris, is chest pain or discomfort that happens when the heart muscle does not receive enough oxygen-rich blood. It is not a disease on its own. Instead, it is a symptom of an underlying heart problem, most often coronary artery disease (a condition in which the arteries that supply blood to the heart become narrowed or stiffened by fatty deposits called plaque).

When the heart works harder, for example during exercise, emotional stress or cold weather, it needs more oxygen. If narrowed arteries cannot deliver enough blood to meet that demand, the heart muscle signals distress, and the person feels pressure, tightness or pain. The discomfort usually eases when the demand falls, such as after resting.

Angina is most common in adults over the age of 60, although it can occur earlier, particularly in people with diabetes, high blood pressure or a strong family history of heart disease. Men tend to develop it at a younger age than women, but women are also affected and may experience symptoms that are less typical. Understanding what angina is matters because it is often a warning sign that a heart attack could occur if the underlying cause is not addressed.

Doctors generally describe several types of angina:

• Stable angina: the most common form. Symptoms follow a predictable pattern, are triggered by exertion or stress, last a few minutes and improve with rest or medication.
• Unstable angina: symptoms appear unexpectedly, may occur at rest, last longer or feel more severe than usual, and do not respond as well to rest or medication. This is a medical emergency.
• Variant (Prinzmetal) angina: a less common form caused by a temporary spasm of a coronary artery rather than a fixed blockage. It often occurs at rest, frequently at night or early morning.
• Microvascular angina: pain caused by problems in the smallest blood vessels of the heart, which may not show up on standard tests of the larger arteries.

Angina symptoms

Angina symptoms vary from person to person, and not everyone experiences classic chest pain. Some people describe a sensation more like indigestion, heaviness or a squeezing feeling. Common angina symptoms include:

• Pressure, tightness, squeezing or aching in the center or left side of the chest
• Discomfort that spreads to the arms (often the left), shoulders, neck, jaw, throat or back
• Shortness of breath
• Unusual tiredness or weakness
• Sweating
• Nausea or a feeling of indigestion
• Dizziness or light-headedness
• A sense of anxiety or unease during an episode

With stable angina, episodes typically last between one and fifteen minutes and are brought on by physical effort, a heavy meal, emotional stress, cold temperatures or smoking. Symptoms usually settle within a few minutes of stopping the activity or taking prescribed nitroglycerin (a medication that widens blood vessels).

Unstable angina behaves differently. The pain may begin at rest or during sleep, may be more intense than earlier episodes, may last longer than 15 to 20 minutes, and may not go away with rest or medication. A change in the usual pattern of angina, such as episodes becoming more frequent or triggered by less effort, is also a warning sign that the condition may be worsening.

Women, older adults and people with diabetes are more likely to have less typical symptoms. They may notice breathlessness, fatigue, nausea, or discomfort in the back, jaw or abdomen rather than obvious chest pain. Because these signs are easy to attribute to other causes, they are sometimes overlooked.

Causes and risk factors

The most common cause of angina is coronary artery disease. Over time, a fatty substance called plaque builds up inside the coronary arteries, a process known as atherosclerosis. The plaque narrows the arteries and makes them less flexible, so less blood reaches the heart muscle. When the heart needs more oxygen than the narrowed arteries can supply, angina occurs.

Other angina causes include:

• Coronary artery spasm: a sudden tightening of the muscle in an artery wall, which briefly cuts off blood flow (the cause of variant angina)
• Coronary microvascular disease: damage or dysfunction in the tiny arteries of the heart
• Blood clots: a clot forming on a piece of ruptured plaque can partly block an artery and trigger unstable angina
• Conditions that increase the heart’s workload: severe anemia (low red blood cells), an overactive thyroid, very high blood pressure or narrowing of the aortic valve can all contribute

Several factors raise the likelihood of developing coronary artery disease and, therefore, angina. Some can be changed, while others cannot:

• Smoking or long-term exposure to secondhand smoke
• High blood pressure (hypertension)
• High levels of LDL cholesterol (often called “bad” cholesterol) or triglycerides
• Diabetes or prediabetes
• Being overweight or having obesity
• Physical inactivity
• An unhealthy diet high in saturated fat, salt and sugar
• Chronic stress
• Older age
• A family history of early heart disease
• Chronic kidney disease

Having more than one risk factor tends to increase the overall risk. Many of these factors also affect how well angina can be controlled once it has developed.

Angina diagnosis

An angina diagnosis begins with a detailed conversation about your symptoms. Your doctor will want to know what the discomfort feels like, where it is located, what brings it on, how long it lasts and what relieves it. Your medical history, family history and risk factors are also reviewed, followed by a physical examination that includes checking blood pressure and listening to the heart and lungs.

Because chest discomfort can have many causes, several tests are usually needed to confirm that the heart is the source and to assess how serious the problem is. Common tests include:

• Electrocardiogram (ECG or EKG): a painless test that records the electrical activity of the heart. It can show signs of reduced blood flow or a previous heart attack, although a normal result does not rule out angina.
• Blood tests: these check cholesterol, blood sugar and kidney function, and may measure troponin, a protein released when heart muscle is damaged. Troponin helps distinguish unstable angina from a heart attack.
• Exercise stress test: you walk on a treadmill or pedal a stationary bicycle while your ECG, heart rate and blood pressure are monitored. Symptoms or ECG changes during exertion suggest reduced blood flow.
• Stress echocardiogram or nuclear stress test: imaging performed before and after exercise (or after a medication that mimics exercise) to see how well blood reaches different parts of the heart. An echocardiogram uses ultrasound; a nuclear test uses a small amount of radioactive tracer.
• Coronary CT angiography: a specialized CT scan performed after an injection of contrast dye, which produces detailed images of the coronary arteries and can show narrowing or calcium deposits.
• Coronary angiography (cardiac catheterization): a thin tube called a catheter is guided through a blood vessel in the wrist or groin to the heart, and dye is injected so the arteries can be seen on X-ray. This is considered the most definitive test for locating blockages and is often used when other results are unclear or when a procedure may be needed.
• Chest X-ray: helps rule out lung causes of chest pain and shows the size of the heart.

Doctors also classify angina by how much it limits daily activity, which helps guide treatment decisions. In many hospitals, including within Acibadem, this evaluation is coordinated by cardiologists, who are physicians specializing in heart conditions.

Angina treatment options

Angina treatment options have two main goals: to relieve symptoms so you can carry out daily activities, and to lower the risk of a heart attack or other serious complications. The right combination depends on the type of angina, its severity, your other health conditions and your personal preferences. Treatment is usually built in stages.

Lifestyle changes

Lifestyle changes form the foundation of angina care and are recommended for almost everyone. They include stopping smoking, eating a diet rich in vegetables, fruits, whole grains and healthy fats, limiting salt and saturated fat, staying physically active within limits agreed with your doctor, maintaining a healthy weight, managing stress and limiting alcohol. These measures may reduce how often angina occurs and help slow the progression of coronary artery disease.

Medications

Most people with angina take one or more medications. Your doctor may prescribe:

• Nitrates (such as nitroglycerin): relax and widen blood vessels. Fast-acting forms are used during an episode; long-acting forms help prevent attacks.
• Beta blockers: slow the heart rate and lower blood pressure, reducing the heart’s demand for oxygen.
• Calcium channel blockers: relax artery walls and are particularly useful for variant angina caused by spasm.
• Antiplatelet medications (such as aspirin): make blood less likely to clot and reduce the risk of a heart attack.
• Statins: lower cholesterol and help stabilize plaque in the arteries.
• Blood pressure medications such as ACE inhibitors, which protect the heart and blood vessels.
• Other anti-anginal drugs such as ranolazine or ivabradine, which may be added when symptoms persist despite standard therapy.

Procedures and surgery

If medications and lifestyle changes do not control symptoms, or if tests show severe narrowing in important arteries, your doctor may discuss a procedure to restore blood flow:

• Percutaneous coronary intervention (PCI, or angioplasty and stenting): a catheter with a small balloon is guided to the narrowed artery and inflated to open it. In most cases a stent, a small mesh tube, is left in place to keep the artery open. This is performed through a small puncture in the wrist or groin and usually requires a short hospital stay.
• Coronary artery bypass grafting (CABG): an open-heart operation in which a healthy blood vessel taken from another part of the body is used to create a new route for blood around a blocked artery. It is often considered when several arteries are affected or when the main left coronary artery is severely narrowed.

These procedures can relieve symptoms effectively for many people, but they do not cure the underlying coronary artery disease. Ongoing medication and lifestyle changes remain necessary afterwards.

Cardiac rehabilitation

Cardiac rehabilitation is a structured, medically supervised program combining exercise training, education about heart-healthy living and emotional support. It is commonly recommended after a procedure, a hospital stay for unstable angina or a heart attack, and it may also benefit people with stable angina. Care for angina, including rehabilitation, is typically provided by a hospital’s Cardiology Department.

Living with angina and outlook

Angina is a long-term condition, but many people manage it well and continue to lead active lives. The outlook depends largely on the extent of the underlying coronary artery disease, how consistently treatment is followed and how well risk factors such as blood pressure, cholesterol and blood sugar are controlled. Stable angina that responds to treatment generally carries a better outlook than unstable angina, which signals a higher short-term risk of heart attack.

Practical steps that often help include:

• Learning your personal triggers and pacing activities accordingly
• Carrying fast-acting nitroglycerin, if prescribed, and knowing exactly how to use it
• Taking all medications as directed, even when you feel well
• Attending regular follow-up appointments and any recommended tests
• Warming up before exercise and avoiding heavy exertion straight after meals or in very cold weather
• Seeking support for anxiety or low mood, which are common after a heart diagnosis

Angina can be unpredictable, and it is normal to feel worried about when the next episode might occur. Talking openly with your care team about what activities are safe, including work, travel, driving and sexual activity, can help restore confidence. No treatment can guarantee that angina will never return, but with appropriate care the risk of serious complications can often be reduced.

Frequently asked questions

What is angina, and is it the same as a heart attack?

Angina and a heart attack are related but different. Angina is temporary chest discomfort caused by reduced blood flow to the heart muscle that does not cause permanent damage. A heart attack occurs when blood flow is blocked long enough to injure or kill part of the heart muscle. Angina, especially unstable angina, can be a warning that a heart attack may follow, which is why new or changing symptoms should always be assessed promptly.

What do angina symptoms feel like?

Most people describe pressure, tightness, squeezing or heaviness in the chest, sometimes spreading to the arm, neck, jaw or back. Some feel breathless, sweaty, nauseated or unusually tired instead of, or in addition to, chest pain. Symptoms of stable angina are usually triggered by effort or stress and ease with rest within a few minutes. Because the sensation varies, any unexplained chest discomfort should be discussed with a doctor.

What are the main angina causes?

The most common cause is coronary artery disease, in which fatty plaque narrows the arteries supplying the heart. Less commonly, angina results from a spasm of a coronary artery, problems in the heart’s smallest vessels, or conditions such as severe anemia or aortic valve narrowing that increase the heart’s workload. Risk factors such as smoking, high blood pressure, high cholesterol, diabetes and inactivity all contribute.

How is an angina diagnosis confirmed?

Doctors combine a detailed symptom history with tests. An electrocardiogram and blood tests are usually done first. A stress test, in which the heart is monitored during exercise or after medication that simulates exercise, can reveal reduced blood flow. Imaging such as coronary CT angiography or coronary angiography shows the arteries directly and is often used to confirm the diagnosis and plan treatment.

What are the angina treatment options if medication does not work?

When symptoms persist despite medication and lifestyle changes, or when tests show significant narrowing, doctors may recommend angioplasty with stenting to open a blocked artery, or coronary artery bypass surgery to route blood around blockages. The choice depends on the number and location of affected arteries and on your overall health. Both approaches are followed by continued medication and often cardiac rehabilitation.

Can angina go away on its own?

An individual episode of stable angina usually passes with rest or nitroglycerin, but the underlying artery narrowing does not go away by itself. Without treatment, symptoms often become more frequent or severe over time. With medication, lifestyle changes and, where needed, procedures, many people experience far fewer episodes, though the condition generally needs lifelong management.

Is it safe to exercise with angina?

For most people with stable angina, regular moderate exercise is encouraged and may improve symptoms and overall heart health. However, the type and intensity of exercise should be agreed with your doctor, who may recommend a supervised cardiac rehabilitation program to start. Exercise should be stopped if chest discomfort develops, and unstable angina requires medical assessment before any exercise is resumed.

When to see a doctor

Anyone who experiences chest discomfort for the first time, even if it goes away with rest, should arrange to see a doctor so the cause can be identified. People already diagnosed with angina should report any change in their usual pattern, such as episodes that are more frequent, longer, more severe or triggered by less activity than before, as this may indicate that treatment needs adjusting.

Call emergency services immediately, rather than driving yourself to hospital, if you notice any of the following red-flag warning signs, which may indicate unstable angina or a heart attack:

• Chest pain or pressure that lasts longer than a few minutes or keeps returning
• Chest discomfort that does not improve with rest or after taking prescribed nitroglycerin as directed
• Pain spreading to the arm, jaw, neck, back or upper stomach
• Chest discomfort accompanied by shortness of breath, cold sweat, nausea or vomiting
• Sudden dizziness, fainting or a feeling of impending collapse
• Angina that begins at rest or wakes you from sleep
• A rapid, pounding or irregular heartbeat together with chest discomfort

These symptoms should never be ignored or attributed to indigestion or stress without medical assessment. Acting quickly can limit damage to the heart muscle and may save a life.