Coronary Artery Disease

Overview

Coronary artery disease is a common heart condition that affects the blood vessels supplying the heart muscle. These blood vessels are called coronary arteries. Over time, fatty deposits and other substances can build up inside the artery walls, causing them to become narrowed or stiff. This can reduce the flow of oxygen-rich blood to the heart.

When the heart muscle does not receive enough blood, a person may experience chest discomfort, shortness of breath, or other symptoms. In some cases, coronary artery disease can lead to serious problems such as a heart attack or heart rhythm disturbances. However, with timely medical evaluation, appropriate treatment, and lifestyle changes, many people can manage the condition and reduce future risks.

Symptoms

Symptoms of coronary artery disease can vary from person to person. Some people have clear symptoms, while others may have mild or no symptoms until the disease becomes more advanced.

• Chest pain, pressure, tightness, heaviness, or discomfort, often called angina
• Discomfort that may spread to the arms, shoulders, neck, jaw, back, or upper abdomen
• Shortness of breath, especially during physical activity
• Fatigue or reduced ability to exercise
• Dizziness, lightheadedness, or fainting
• Nausea, sweating, or a feeling of indigestion
• Palpitations or an irregular heartbeat

Symptoms may appear during exercise, emotional stress, cold weather, or after a heavy meal, and may improve with rest. In some people, especially older adults, people with diabetes, and women, symptoms may be less typical, such as unusual tiredness, breathlessness, or discomfort without strong chest pain.

Causes and Risk Factors

Coronary artery disease usually develops gradually. The main underlying process is the buildup of plaque inside the coronary arteries. Plaque can narrow the arteries and reduce blood flow. If a plaque becomes unstable, a blood clot may form and suddenly block blood flow, which can cause a heart attack.

Several factors can increase the risk of developing coronary artery disease:

• High blood pressure
• High cholesterol or unhealthy blood fat levels
• Smoking or exposure to tobacco smoke
• Diabetes or insulin resistance
• Being overweight or physically inactive
• Unhealthy diet, especially one high in saturated fats, trans fats, salt, or added sugars
• Family history of heart disease, especially at a younger age
• Older age
• Chronic stress
• Sleep disorders, including untreated sleep apnea
• Kidney disease or other long-term inflammatory conditions

Some risk factors, such as age and family history, cannot be changed. Others, such as smoking, diet, activity level, blood pressure, and blood sugar control, can often be improved with medical guidance and long-term lifestyle changes.

Diagnosis

Diagnosis of coronary artery disease begins with a medical consultation. A cardiologist or other healthcare professional will ask about symptoms, medical history, family history, lifestyle habits, and current health conditions. A physical examination and blood pressure measurement are also commonly performed.

Depending on the situation, tests may be recommended to evaluate heart health and blood flow. These may include:

• Blood tests to assess cholesterol, blood sugar, and other health markers
• Electrocardiogram to record the heart’s electrical activity
• Exercise or medication-based stress testing to assess how the heart responds under increased demand
• Echocardiography to view heart structure and function using ultrasound
• Coronary calcium scoring or computed tomography imaging to assess plaque or artery narrowing
• Coronary angiography, an imaging test used to view the coronary arteries in more detail

The choice of tests depends on symptoms, overall risk, previous medical conditions, and the urgency of the situation. Not every patient needs every test.

Treatment Options

Treatment for coronary artery disease aims to improve blood flow to the heart, relieve symptoms, reduce the risk of complications, and support overall cardiovascular health. The most appropriate treatment plan depends on the severity of the disease, symptoms, test results, and the patient’s general health.

Lifestyle changes are an important part of care. These may include stopping smoking, following a heart-healthy eating pattern, being physically active as advised by a doctor, maintaining a healthy weight, managing stress, and improving sleep habits. Control of blood pressure, cholesterol, and blood sugar is also important.

Medicines may be recommended to reduce the workload of the heart, improve blood flow, prevent clot formation, or manage risk factors such as high blood pressure, high cholesterol, or diabetes. The specific choice of medication should always be decided by a qualified healthcare professional based on individual needs.

Some patients may need procedures to improve blood flow. One option is coronary angioplasty with stent placement, where a narrowed artery is widened and supported with a small mesh tube. Another option is coronary artery bypass surgery, in which a new route is created for blood to flow around blocked arteries. These treatments are considered based on the location and severity of artery narrowing, symptoms, and overall heart function.

Follow-up care is essential. Regular monitoring helps assess symptoms, treatment response, and risk factor control. Patients should not stop or change prescribed treatments without consulting their healthcare provider.

When to See a Doctor

Seek medical attention if you have chest discomfort, shortness of breath, unexplained fatigue, palpitations, or symptoms that occur with activity and improve with rest. People with risk factors such as high blood pressure, diabetes, high cholesterol, smoking history, or a family history of heart disease should discuss heart health screening with a healthcare professional.

Emergency medical care is needed if chest pain is severe, new, prolonged, or occurs with sweating, nausea, fainting, severe shortness of breath, or pain spreading to the arm, jaw, neck, or back. These symptoms can be signs of a heart attack and should be treated urgently.