Blocked heart arteries, medically known as coronary artery disease (CAD), develop gradually over many years and often do not cause symptoms in the early stages. As the arteries narrow, the heart receives less oxygen-rich blood, increasing the risk of chest pain (angina), heart attack, heart failure, and other serious complications.
Coronary artery disease is one of the leading causes of death worldwide, but many cases can be prevented or managed through early detection, healthy lifestyle changes, and timely treatment. Understanding the warning signs and risk factors can help you seek medical care before permanent heart damage occurs.
Coronary artery disease (CAD), also known as coronary heart disease (CHD) or ischaemic heart disease (IHD), occurs when the coronary arteries become narrowed or blocked. These arteries supply oxygen and nutrients to the heart muscle, allowing it to pump blood throughout the body.
As blood flow becomes restricted, the heart may not receive enough oxygen during physical activity or emotional stress, leading to chest pain or other symptoms. If blood flow is completely blocked, a heart attack can occur.
The most common cause of coronary artery disease is atherosclerosis, a gradual build-up of fatty deposits, cholesterol, calcium, and other substances inside the artery walls.
Over time, these deposits form plaque, causing the arteries to become narrower and less flexible. As blood flow decreases, the heart has to work harder to receive enough oxygen.
In some cases, plaque can rupture unexpectedly, causing a blood clot to form. If the clot completely blocks a coronary artery, it can trigger a heart attack.
Many people with coronary artery disease have no symptoms during the early stages. Symptoms often appear only when the arteries have become significantly narrowed.
Common signs and symptoms include:
Chest pain, pressure, or discomfort (angina)
A feeling of tightness or heaviness in the chest
Pain that spreads to the neck, jaw, shoulder, arm, or back
Shortness of breath
Fatigue
Reduced exercise tolerance
Dizziness or light-headedness
General weakness
Symptoms may become more noticeable during physical activity or emotional stress, when the heart requires more oxygen.
A heart attack occurs when blood flow to the heart is severely reduced or completely blocked.
Seek immediate emergency medical attention if you experience:
Severe chest pain or pressure
Pain spreading to the left arm, shoulder, jaw, neck, or back
Shortness of breath
Cold sweats
Nausea or vomiting
Sudden dizziness or fainting
Prompt treatment can reduce heart muscle damage and improve survival.
Several factors increase the likelihood of developing coronary artery disease. These include:
High cholesterol
High blood pressure
Diabetes
Smoking
Overweight or obesity
Physical inactivity
An unhealthy diet high in saturated fat, trans fat, sugar, and salt
Excessive alcohol consumption
Increasing age
Family history of heart disease
Male sex, although the risk in women increases significantly after menopause
Many of these risk factors are manageable through lifestyle changes and regular medical care.
If coronary artery disease is suspected, your cardiologist will review your symptoms, medical history, and cardiovascular risk factors before recommending appropriate investigations.
Diagnostic tests may include:
Electrocardiogram (ECG)
Exercise stress test
Echocardiogram
Blood tests, including cholesterol profile, blood glucose, HbA1c, triglycerides, and inflammatory markers
Cardiac catheterisation and coronary angiography
These tests help determine whether coronary arteries are narrowed or blocked and guide the most appropriate treatment plan.
Treatment aims to restore blood flow to the heart, relieve symptoms, and reduce the risk of heart attack and other complications.
Depending on the severity of the disease, treatment may include medication, minimally invasive procedures, or surgery.
Your cardiologist may prescribe medication to:
Lower cholesterol
Control blood pressure
Relieve angina
Reduce the risk of blood clot formation
Balloon angioplasty and coronary stenting can be used to widen narrowed coronary arteries and improve blood flow to the heart.
When multiple arteries are severely blocked, coronary artery bypass graft (CABG) surgery may be recommended. During this procedure, healthy blood vessels from another part of the body are used to create new pathways around blocked coronary arteries.
Existing plaque inside the arteries usually cannot be completely removed. However, treatment and healthy lifestyle changes can slow disease progression, stabilise plaque, improve blood flow, and significantly reduce the risk of heart attack.
Important steps include:
Stopping smoking
Following a heart-healthy diet
Exercising regularly
Maintaining a healthy weight
Managing diabetes, blood pressure, and cholesterol
Taking medications as prescribed
Early intervention is one of the most effective ways to protect long-term heart health.
Although factors such as age and family history cannot be changed, many cases of coronary artery disease can be prevented or delayed.
Healthy habits include:
Avoid smoking and second-hand smoke
Eat a balanced, heart-healthy diet
Stay physically active
Maintain a healthy weight
Manage stress
Limit alcohol intake
Monitor blood pressure, cholesterol, and blood sugar
Attend regular health screenings
Looking after your heart throughout adulthood is one of the most effective ways to reduce the risk of coronary artery disease.
Do not ignore recurring chest discomfort, especially if it occurs during physical activity or emotional stress.
Arrange a medical assessment if you experience:
Recurrent chest pain or pressure
Shortness of breath
Reduced exercise tolerance
Fatigue without a clear cause
Multiple cardiovascular risk factors such as diabetes, high cholesterol, or hypertension
Seek emergency medical attention immediately if you develop severe chest pain, pain spreading to the arm or jaw, difficulty breathing, or sudden collapse.
Early diagnosis and treatment can significantly reduce the risk of heart attack and improve long-term heart health.
At Prince Court Medical Centre, our experienced cardiologists provide comprehensive care for coronary artery disease, from cardiovascular risk assessment and advanced diagnostic testing to minimally invasive procedures and cardiac surgery when required.
Schedule an appointment with our cardiologists today for a personalised heart health assessment and treatment plan.
Reviewed by Dr. Beh Ting Yuen
Be the first in line to receive the latest updates and promotions, delivered directly to your inbox.
Please enter a valid email
Thank you for subscribing!
Please verify that you are not a robot.
