What Is Coronary Artery Disease?

What Is Coronary Artery Disease? Understanding the Heart’s Warning Signs

Introduction

The heart works tirelessly, pumping oxygen-rich blood throughout the body every second of the day. But when the arteries that supply the heart itself become narrowed or blocked, the consequences can be life-threatening. This condition, known as coronary artery disease (CAD), is one of the leading causes of death worldwide—and a major contributor to heart attacks and heart failure.

Understanding how coronary artery disease develops, what warning signs to watch for, and how it can be prevented is essential for protecting long-term heart health.

What Is Coronary Artery Disease?

Coronary artery disease occurs when the coronary arteries—the blood vessels that supply oxygen and nutrients to the heart muscle—become narrowed or blocked by a buildup of fatty deposits known as plaque.

Over time, plaque hardens and restricts blood flow. When the heart muscle does not receive enough oxygen, it cannot function properly. This process develops gradually and often goes unnoticed until serious symptoms appear.

Why Plaque Builds Up in the Arteries

Plaque buildup begins early in life and progresses over many years. Some risk factors cannot be changed, while others are directly influenced by lifestyle choices.

Non-modifiable risk factors include:

• Age
  
  

• Male sex
  
  

• Family history of heart disease
  
  

Modifiable risk factors include:

• Smoking
  
  

• High blood pressure
  
  

• High cholesterol
  
  

• Diabetes
  
  

• Obesity
  
  

• Physical inactivity
  
  

• Poor diet
  
  

Smoking damages blood vessels, making it easier for plaque to form. High blood pressure and diabetes accelerate artery damage, while unhealthy diets contribute to excess cholesterol in the bloodstream.

How Coronary Artery Disease Progresses

Coronary artery disease develops in stages:

Early stage (Silent ischemia)

Plaque buildup begins, but there are no noticeable symptoms. Many people are unaware anything is wrong.

Middle stage (Stable angina)

As arteries narrow further, blood flow becomes restricted during physical activity or stress. Chest discomfort or tightness may occur and typically improves with rest.

Advanced stage (Unstable angina or heart attack)

Severe blockage or rupture of plaque can suddenly stop blood flow. This can lead to a heart attack, which causes permanent damage to the heart muscle if not treated immediately.

Warning Signs You Should Never Ignore

Symptoms of coronary artery disease may include:

• Chest pain or pressure
  
  

• Shortness of breath
  
  

• Fatigue with mild activity
  
  

• Dizziness or lightheadedness
  
  

• Pain radiating to the arms, neck, jaw, or back
  
  

In some cases, the first sign of CAD is a heart attack. This is why early screening and preventive care are critical.

Complications of Untreated Coronary Artery Disease

If left unmanaged, coronary artery disease can lead to:

• Heart failure (the heart becomes too weak to pump effectively)
  
  

• Abnormal heart rhythms (arrhythmias)
  
  

• Recurrent heart attacks
  
  

• Sudden cardiac arrest
  
  

These outcomes significantly reduce quality of life and can be fatal without timely medical intervention.

How to Reduce Your Risk

The good news is that coronary artery disease is largely preventable and manageable.

Heart-healthy habits include:

• Eating a balanced diet rich in fruits, vegetables, whole grains, and lean proteins
  
  

• Limiting salt, sugar, and unhealthy fats
  
  

• Exercising regularly
  
  

• Quitting smoking
  
  

• Managing stress
  
  

• Monitoring blood pressure, cholesterol, and blood sugar
  
  

• Attending regular medical check-ups
  
  

Even small lifestyle changes can lead to meaningful improvements in heart health.

Key Takeaway

Coronary artery disease develops quietly but can have devastating consequences if ignored. Understanding the risk factors, recognizing early warning signs, and making heart-healthy lifestyle choices can dramatically reduce the risk of heart attacks and related complications.

Your heart’s health today determines your quality of life tomorrow.

Source: Adapted and rewritten from HealthBytes – The Official Jamaica Diaspora Health Taskforce Newsletter, Volume 3, Issue 1 (October 2023)