Angina

Introduction

Angina, often described as angina pectoris, is chest pain or discomfort caused by reduced blood flow to the heart muscle. When your heart muscle doesn’t get enough oxygen-rich blood, it can cause squeezing chest pain or a feeling of pressure, tightness or fullness in the chest. This is the body’s signal that the heart is working too hard or not getting enough blood supply.

The good news is that with early diagnosis and the right care, people with angina can manage their symptoms, improve their quality of life and reduce their risk of more serious heart disease.

On this page, you will find:

If you’re experiencing chest pain over the heart or other symptoms, know that help is here for you.

Signs & Symptoms

Spotting symptoms early can make a big difference in seeking timely help. The location and nature of the pain can vary.

Common angina pectoris symptoms include:

Chest pain coming and going – A sensation of pressure, squeezing, fullness or pain in the centre of the chest, often triggered by physical activity or stress
Radiating pain – Discomfort that may spread to the left arm, neck, jaw, back or even the upper stomach
Shortness of breath – Feeling breathless, especially during exertion
Fatigue – Unusual or persistent tiredness, even after minimal activity
Nausea – A sick or unsettled feeling in the stomach
Cold sweat – Sudden sweating not related to heat or exertion
Dizziness or lightheadedness – Feeling faint or unsteady

These angina symptoms often worsen with exertion or emotional stress and typically ease with rest or medication. If you notice these signs, especially chest pain over the heart, talk to your specialist as soon as possible.

Causes & Risk Factors

Angina causes are almost always related to reduced blood flow to the heart muscle, typically due to narrowed heart arteries. The aetiology of chest pain in angina is usually coronary artery disease (CAD).

Key causes of chest pain and tightness:

Coronary artery disease from plaque buildup that narrows arteries and limits blood flow
High blood pressure that strains the heart and damages the artery walls
High cholesterol that contributes to artery-clogging plaque
Diabetes that increases artery damage and heart disease risk
Smoking that damages blood vessels and accelerates plaque formation
Obesity adds strain to the heart and worsens related risks
Physical inactivity that weakens heart health and contributes to other conditions
Stress that can trigger or intensify episodes of chest pain
Family history of heart disease raises your overall risk

Knowing the reason for heart pain helps you and your specialist find the right treatment plan for your angina.

Diagnosis

An accurate diagnosis will confirm if your chest pain is due to angina and determine the next steps for treatment.

Detailed medical history and symptom review: Your specialist will ask about your symptoms, including when and how the pain occurs, what triggers it and what relieves it
Physical examination: To assess your heart rate, blood pressure and listen to your heart and lungs
Electrocardiogram (ECG/EKG): Records electrical signals of your heart to detect abnormalities that might indicate reduced blood flow
Stress test: You exercise on a treadmill or stationary bike while your heart activity is monitored. This helps detect angina that appears only during exertion. Sometimes, a pharmacological stress test (with medication) is used if you can't exercise
Echocardiogram: Uses sound waves to create images of your heart, showing how well it pumps blood
Blood tests: To check cholesterol levels, blood sugar, and markers for heart damage
Coronary Angiography: A definitive test where a catheter is threaded through an artery to the heart, and dye is injected to visualise the coronary arteries and identify blockages

Types of Angina

Angina refers to chest pain or discomfort that occurs when the heart muscle doesn’t get enough oxygen-rich blood. There are several types, each with distinct causes, triggers and patterns.

Understanding these can help guide proper diagnosis and treatment.

1. Stable Angina (Exertional Angina)

Cause: Narrowing of the coronary arteries due to plaque buildup (atherosclerosis), which limits blood flow to the heart during increased demand
Triggers: Physical activity (e.g. climbing stairs, exercising), emotional stress, cold weather or heavy meals
Symptoms:
- Predictable chest pain or discomfort that occurs with exertion and subsides with rest or nitroglycerin
- Pain often feels like pressure, squeezing or tightness in the chest
- May radiate to the arms, jaw, neck or back
Pattern: Regular and consistent—symptoms occur under the same conditions each time

2. Unstable Angina

Cause: Sudden reduction in blood flow, often due to a ruptured plaque or blood clot partially blocking a coronary artery
Triggers: Can occur suddenly and unpredictably, even at rest or with minimal activity
Symptoms:
- New, worsening or more frequent chest pain
- Pain that lasts longer, is more intense or occurs at rest
- May not fully respond to rest or nitroglycerin
Urgency: This is a medical emergency. It may indicate an impending heart attack and requires immediate attention

3. Variant Angina (Prinzmetal’s Angina)

Cause: Spasm in the coronary arteries, which temporarily reduces or stops blood flow
Triggers: Often occurs at rest, especially at night or in the early morning.
- May be related to stress, smoking or stimulant use (e.g. cocaine)
Symptoms:
- Sudden chest pain at rest
- Episodes tend to occur in clusters, often at the same time each day
- May be accompanied by temporary ECG changes (ST-segment elevation)
Note: Despite normal-looking coronary arteries on angiography, spasms can cause significant symptoms

4. Microvascular Angina (Syndrome X)

Cause: Dysfunction in the small coronary blood vessels (microvasculature), rather than blockages in the larger coronary arteries
Triggers: Physical exertion, stress, or emotional upset
- It may also occur at rest
Symptoms:
- Chest pain that can last longer than other types of angina
- Discomfort may be more diffuse or feel like burning, heaviness or pressure
- Often more common in women and may not show on standard heart tests
Diagnosis: May require advanced imaging or testing for coronary microvascular dysfunction.

Each type of angina has distinct characteristics, but all are signs that the heart may not be getting enough oxygen. If you experience new or worsening chest pain, seek prompt medical evaluation—especially if it’s sudden, severe or occurs at rest.

Early detection and proper management can prevent complications such as a heart attack.

Treatments

Treatment focuses on reducing the frequency and severity of angina attacks, preventing heart attacks and improving quality of life.

Key treatment elements for angina:

Lifestyle modifications: Quitting smoking, healthy diet, regular exercise, managing weight and stress reduction
Medications:
- Nitrates to relax blood vessels and increase blood flow (e.g., nitroglycerin for quick relief of angina pain)
- Beta-blockers slow the heart rate and reduce blood pressure, decreasing the heart’s oxygen demand
- Calcium channel blockers to relax and widen blood vessels
- Statins to lower cholesterol and stabilise plaque
- Antiplatelet drugs, like aspirin, are used to prevent blood clots
Medical procedures:
- Angioplasty and stenting: A balloon is used to open a narrowed artery, and a stent (a small mesh tube) is placed to keep it open
- Coronary Artery Bypass Graft (CABG) surgery: A healthy blood vessel from another part of the body is used to bypass a blocked coronary artery

When managed properly, people with angina can have improved heart health and reduced angina symptoms.

Ready to learn what might help you? Learn more about angina treatments on this page.

Complications

Without treatment, angina can lead to:

Heart attack, especially in unstable angina when blood flow is severely or completely blocked
Arrhythmias or irregular heart rhythms that may affect heart function
Heart failure as the heart's ability to pump blood weakens over time
Stroke, though less common, may occur if blood clots travel to the brain
Ongoing chest pain that persists and affects daily activities and quality of life

Prevention

While you cannot prevent all causes of angina, you can lower the risk of developing the condition and its complications by:

Manage blood pressure, cholesterol and diabetes to protect heart health
Quit smoking, as it's one of the most significant modifiable risk factors
Eat a heart-healthy diet rich in fruits, vegetables, whole grains and lean proteins
Stay physically active with at least 150 minutes of moderate exercise each week
Maintain a healthy weight to reduce strain on your heart
Manage stress through relaxation techniques, hobbies or mindfulness practices
Schedule regular medical check-ups to monitor heart health and catch issues early

With the right precautions and awareness, many people can avoid an angina attack and maintain good heart health.

Living with Angina

Living well means managing your condition day to day:

Take your medications as prescribed consistently
Know your symptoms and what triggers them
Learn how to use nitroglycerin effectively if prescribed
Maintain a heart-healthy lifestyle
Communicate openly with your healthcare team and support system

Navigating Angina in Singapore

The Problem and Types of Conditions

Angina is a growing concern, especially among individuals with risk factors such as high blood pressure, diabetes, or a family history of heart disease. Angina refers to chest pain or discomfort caused by reduced blood flow to the heart.

It can present as stable angina, which occurs during exertion, or unstable angina, which may occur unpredictably and signal a higher risk of heart attack. Understanding these types is crucial for timely diagnosis and effective management.

Consultation to Ongoing Care

For those experiencing angina in Singapore, the first step is usually a consultation with a general practitioner or cardiologist. Diagnostic tests such as ECGs, stress tests or coronary angiography may be recommended to confirm the condition. Treatment options may include lifestyle adjustments, medication, or procedures like angioplasty and stenting.

Recovery and long-term management involve cardiac rehabilitation, regular follow-ups and monitoring to ensure the heart stays healthy. With a structured care pathway, patients in Singapore can visualise the journey from diagnosis to sustained heart health.

When to Seek Help

It is important to seek help for angina in Singapore as soon as symptoms such as chest tightness, shortness of breath, or pain radiating to the arm, neck, or jaw appear. Immediate medical attention is required if these symptoms occur at rest, worsen suddenly, or last longer than a few minutes. Early intervention can prevent complications and provide reassurance through timely treatment and ongoing care.

Find an Angina Specialist/Cardiologist in Singapore

You do not have to manage angina alone. A specialist can help assess your condition, identify the specific angina type you have, adjust medication and recommend advanced treatments.

If you or someone you love has chest pain over the heart or other concerning angina symptoms, book a consultation to get clear answers.

Take the first step toward stable heart health and peace of mind.

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