Coronary Artery Disease

At a Glance

Coronary artery disease (CAD) is a disease of the coronary arteries that supply blood and oxygen to the heart muscle; it is a category of conditions that includes atherosclerotic stenosis.

Typical clinical manifestations include chest pain, pressure, or tightness that may occur during activity or stress, dyspnea, and unusual fatigue; discomfort may radiate to the neck, jaw, shoulder, or arms.

How the disease works

The primary contributing factor is atherosclerosis, in which plaques containing fat, cholesterol, calcium, etc., accumulate within the coronary arteries over time.

When plaque narrows or blocks the blood vessels, blood flow and oxygen supply to the heart muscle decrease.

Variations in presentation among individuals

Risk factors include smoking, diets high in saturated fat, physical inactivity, overweight/obesity, hypertension, hypercholesterolemia, diabetes, family history of premature heart disease, and advanced age. Clinical presentations may vary depending on sex and individual comorbidities.

The broad framework of diagnosis and management

There may be no symptoms at all; however, in some cases, it may begin as angina and progress to myocardial infarction, heart failure, arrhythmia, or cardiac arrest, with symptoms worsening as plaque progresses.

Diagnosis is determined by comprehensively evaluating symptoms, personal and family history, risk factors, and lifestyle habits, along with physical examination, blood pressure measurement, blood tests, and cardiac-related tests if necessary.

Current status of treatment

The absence of symptoms alone cannot rule out the disease, and the interpretation of test results and the degree of vascular stenosis must be made by considering an individual's symptoms, risk level, and other diseases together.

Management is carried out by combining lifestyle habits beneficial to heart health, control of risk factors, prescribed medications, and, if necessary, procedures, surgery, and cardiac rehabilitation.

The current focus of treatment is on improving lifestyle habits such as diet, physical activity, and smoking cessation, and using medications to control blood pressure, lipids, blood glucose, and thrombosis risk; in some cases, procedures or surgeries to restore or bypass blood flow are considered.

How to read clinical trials

In follow-up observations, symptoms, risk factors, test results, and treatment responses are clinically verified, and conclusions regarding efficacy, superiority, or standard of care cannot be drawn solely from the existence or status of clinical trial registrations or observational studies.

Points to verify during clinical consultations

In clinical practice, one can identify the nature of chest pain and its provoking and relieving factors, dyspnea and fatigue, past medical history and family history, smoking and lifestyle habits, risk factors, necessary tests, and treatment goals, and discuss responses to emergency symptoms in advance.