What Is Coronary Artery Disease?
Your heart needs a constant supply of oxygen-rich blood to function properly. This blood is delivered through the coronary arteries, which surround the heart muscle.
Coronary Artery Disease (CAD) occurs when these arteries become narrowed or blocked, most commonly due to the gradual build-up of fatty deposits known as plaque. As the arteries narrow, less blood can reach the heart muscle, particularly during physical activity or periods of stress.
Some people experience symptoms early, while others may not notice any warning signs until the disease has progressed. Early assessment of symptoms and cardiovascular risk factors can help guide appropriate investigations and management.
Key Points
- Coronary artery disease affects the blood vessels that supply the heart.
- It is commonly caused by plaque build-up within the coronary arteries.
- Symptoms may include chest pain, shortness of breath, or reduced exercise tolerance.
- Diagnosis may involve ECG, stress testing, echocardiography, CT coronary angiography, or coronary angiography.
- Treatment depends on the severity of the disease and the individual’s overall health.
What Are the Symptoms of Coronary Artery Disease?
Coronary artery disease can develop gradually over many years. Some people have no symptoms, while others notice changes during physical activity when the heart requires more oxygen.
Common symptoms include:
- Chest pain, pressure, or tightness (angina)
- Shortness of breath during activity
- Pain that spreads to the arm, neck, jaw, shoulder, or back
- Fatigue during physical exertion
- Reduced ability to exercise
- Palpitations in some cases
Symptoms vary from person to person, and some individuals may only experience mild discomfort.
If chest pain is sudden, severe, or lasts for several minutes, seek emergency medical attention immediately, as this may indicate a heart attack.
What Causes Coronary Artery Disease?
Coronary artery disease most commonly develops because of atherosclerosis, a process in which fatty deposits accumulate inside the walls of the coronary arteries.
Over time, these deposits can narrow the arteries and reduce blood flow to the heart muscle.
Several factors can increase the risk of developing coronary artery disease, including:
- High blood pressure
- High cholesterol
- Diabetes
- Smoking
- Overweight or obesity
- Physical inactivity
- Increasing age
- Family history of heart disease
- Chronic kidney disease
- Long-term stress may contribute to cardiovascular risk in some individuals
Having one or more risk factors does not necessarily mean you will develop coronary artery disease, but managing these factors may help reduce your overall cardiovascular risk.
How Is Coronary Artery Disease Diagnosed?
If coronary artery disease is suspected, your cardiologist will begin by discussing your symptoms, medical history, and cardiovascular risk factors before recommending appropriate investigations.
Depending on your condition, tests may include:
Electrocardiogram (ECG)
Records the heart’s electrical activity and may identify changes associated with reduced blood flow or a previous heart attack.
Echocardiogram
Assesses the heart’s structure and pumping function.
Treadmill Stress Test
Evaluates how the heart responds during exercise and may identify changes that occur with increased physical activity.
CT Coronary Angiogram
Provides detailed images of the coronary arteries and may help assess narrowing or plaque build-up.
Coronary Angiography
In some situations, your cardiologist may recommend coronary angiography, a minimally invasive procedure that provides detailed images of the coronary arteries.
Not everyone requires every test. Your cardiologist will recommend investigations based on your symptoms and clinical assessment.
How Is Coronary Artery Disease Treated?
Treatment depends on the severity of the narrowing, your symptoms, and your overall health.
The goals of management are to improve blood flow to the heart, reduce symptoms where possible, and lower the risk of future cardiovascular events.
Treatment may include:
Lifestyle Measures
Lifestyle changes often play an important role alongside medical treatment.
These may include:
- Stopping smoking
- Eating a heart-healthy diet
- Maintaining regular physical activity appropriate for your condition
- Managing body weight
- Controlling blood pressure, cholesterol, and diabetes
Medications
Your cardiologist may prescribe medications to:
- Lower cholesterol
- Manage blood pressure
- Reduce the workload on the heart
- Reduce the risk of blood clots where appropriate
- Help relieve symptoms such as angina
The medications recommended will depend on your individual clinical needs.
Coronary Angioplasty (PCI)
If a significant narrowing is identified, coronary angioplasty, also known as percutaneous coronary intervention (PCI), may be considered to improve blood flow. This procedure involves opening the narrowed artery using a balloon and, in many cases, placing a stent to help keep the artery open.
Coronary Artery Bypass Surgery (CABG)
For some individuals, coronary artery bypass surgery may be recommended. This procedure creates a new pathway for blood to flow around narrowed or blocked coronary arteries.
Your cardiologist will discuss the most appropriate treatment options based on your condition.
Can Coronary Artery Disease Be Prevented?
While not every case can be prevented, managing cardiovascular risk factors may help reduce the likelihood of developing coronary artery disease.
General measures include:
- Keeping blood pressure within recommended levels
- Managing cholesterol and blood sugar
- Staying physically active
- Maintaining a healthy weight
- Avoiding tobacco use
- Limiting alcohol intake where appropriate
- Attending regular medical reviews if you have existing cardiovascular risk factors
Making gradual, sustainable lifestyle changes can contribute to long-term heart health.
When Should You See a Cardiologist?
Chest discomfort does not always indicate coronary artery disease, but it is important to have persistent or recurring symptoms assessed.
You should consider seeing a cardiologist if you experience:
- Chest pain or tightness during activity
- Shortness of breath that limits daily activities
- Unexplained fatigue during exercise
- Multiple cardiovascular risk factors
- A strong family history of heart disease
- Symptoms that are becoming more frequent or severe
Seek immediate emergency medical attention if you experience severe chest pain, pain spreading to the arm or jaw, collapse, or difficulty breathing.
Frequently Asked Questions
1. Is coronary artery disease the same as a heart attack?
No. Coronary artery disease is the gradual narrowing of the coronary arteries. A heart attack can occur when blood flow through one of these arteries becomes suddenly blocked.
2. Can coronary artery disease develop without symptoms?
Yes. Some people have no symptoms until the disease becomes more advanced or is detected during investigations for another reason.
3. Can coronary artery disease be reversed?
While plaque build-up cannot usually be completely removed, lifestyle changes, medications, and appropriate treatment may help slow disease progression and reduce cardiovascular risk.
4. What tests are commonly used to diagnose coronary artery disease?
Your cardiologist may recommend an ECG, echocardiogram, treadmill stress test, CT coronary angiogram, coronary angiography, or other investigations depending on your symptoms and medical history.
5. Will everyone with coronary artery disease need surgery?
No. Many people are managed with lifestyle measures and medication alone. Procedures such as angioplasty or coronary artery bypass surgery are recommended only when clinically appropriate.
Book a Consultation to Assess Your Heart Health
If you’ve been experiencing chest discomfort, breathlessness during activity, or have risk factors for heart disease, a cardiology assessment can help determine whether further evaluation is appropriate.
At Apex Heart Clinic, Dr Daniel Yeo provides consultation, diagnostic assessment, and management for coronary artery disease and other cardiovascular conditions. Investigations and treatment recommendations are tailored to each individual’s clinical needs.
