CAD Medical Abbreviation: Coronary Artery Disease, Plus Other Meanings
In most cardiology and general medical records, CAD means coronary artery disease—disease affecting the coronary arteries that supply blood to the heart muscle. Atherosclerotic plaque buildup is a common cause and can reduce blood flow to the heart.
The abbreviation is not universal. In hematology, CAD can mean cold agglutinin disease, and in radiology literature it can refer to computer-aided diagnosis or detection. The surrounding specialty and sentence determine the intended meaning.
CAD → coronary artery disease
Educational terminology guide: Medical-Terms.org is an independent dictionary website, not a hospital or medical practice. This page explains terminology and context; it does not diagnose coronary artery disease or interpret an individual test result.
What does CAD stand for in medical terms?
CAD most commonly stands for coronary artery disease in cardiology and general medical records. It refers to disease of the coronary arteries, the blood vessels that supply the heart muscle. In other specialties, CAD may mean something else, especially cold agglutinin disease in hematology.
CAD can mean different things in medicine
The correct expansion depends on the specialty and nearby words. Coronary artery disease is the dominant meaning in cardiovascular care, but it is not the only medically valid use of CAD.
| Meaning | Where it appears | Clues in the same note |
|---|---|---|
| Coronary artery disease | Cardiology, primary care, emergency medicine, cardiovascular imaging, discharge summaries | Angina, atherosclerosis, coronary arteries, ischemia, stent, PCI, CABG, heart attack, cholesterol |
| Cold agglutinin disease | Hematology and blood-disorder records | Hemolytic anemia, red blood cells, cold exposure, IgM, complement, direct antiglobulin test |
| Computer-aided diagnosis / detection | Radiology, imaging technology and research literature | Mammography, CT, image analysis, algorithm, radiologist, lesion detection |
Context rule: if a note simply says “history of CAD” in a heart or primary-care chart, coronary artery disease is usually the intended meaning. A hematology note about anemia or cold-reactive antibodies can use the same letters for cold agglutinin disease.
What coronary artery disease means
Coronary artery disease is disease of the coronary arteries. The U.S. National Library of Medicine’s MeSH vocabulary defines the concept broadly as pathological processes of the coronary arteries that may have congenital, atherosclerotic or other non-atherosclerotic causes.
In everyday patient education, CAD usually refers to the common atherosclerotic form in which plaque builds up in the walls of coronary arteries. As the arteries narrow, less oxygen-rich blood can reach the heart muscle. A sudden blockage can contribute to a heart attack.
Coronary
Refers to the arteries that supply the heart muscle with blood and oxygen.
Artery
A blood vessel that carries blood away from the heart. Coronary arteries specifically serve the heart muscle.
Disease
Damage or narrowing in these arteries can reduce blood flow and lead to ischemia, angina or other complications.
CAD vs CHD vs ischemic heart disease
These terms overlap and are often used interchangeably in patient-facing materials, but they emphasize slightly different parts of the same clinical problem. CDC and NHLBI materials commonly connect coronary artery disease with coronary heart disease and ischemic heart disease.
| Term | Expansion | Practical meaning |
|---|---|---|
| CAD | Coronary artery disease | Emphasizes disease in the coronary arteries themselves. |
| CHD | Coronary heart disease | Often used for heart disease resulting from impaired coronary blood supply; many public-health sources use it closely with CAD. |
| IHD | Ischemic heart disease | Emphasizes reduced oxygen-rich blood reaching the heart muscle. |
Do not over-interpret the wording: whether a record says CAD, CHD or IHD, the clinician’s actual diagnosis, test findings and treatment plan matter more than the abbreviation alone.
How to interpret CAD in a medical record without guessing
If the note is about the heart
Words such as angina, coronary stenosis, atherosclerosis, stent, PCI, CABG, ischemia, MI, cardiology or cholesterol strongly support “coronary artery disease.”
If the note is from hematology
Words such as hemolysis, anemia, cold agglutinin, complement, IgM or a direct antiglobulin test point toward “cold agglutinin disease.”
If the note discusses imaging software
Words such as algorithm, lesion detection, mammography, CT, image interpretation or radiologist assistance may indicate computer-aided diagnosis/detection.
If the meaning is still unclear
Read the full sentence and section heading. For a personal record, ask the clinician or records team what CAD means in that exact document rather than making a health decision from an abbreviation list.
| Example chart wording | Likely expansion | Why |
|---|---|---|
| “Known CAD, prior PCI” | Coronary artery disease | PCI is a coronary revascularization procedure commonly used for narrowed or blocked coronary arteries. |
| “CAD with exertional angina” | Coronary artery disease | Angina is a classic symptom associated with reduced coronary blood flow. |
| “CAD with complement-mediated hemolysis” | Cold agglutinin disease | Hemolysis and complement are hematology clues, not coronary-disease terminology. |
| “CAD marks on mammogram” | Computer-aided detection | The surrounding context is image-analysis software. |
Symptoms that can occur with coronary artery disease
Coronary artery disease may cause no symptoms for a long time. When symptoms occur, angina—chest pain or discomfort—is common. Shortness of breath can also occur, and some people first learn they have CAD after a heart attack or another complication.
Chest pain or pressure
Angina may feel like pressure, squeezing, heaviness or discomfort, especially when the heart needs more oxygen.
Shortness of breath
Reduced blood flow or heart dysfunction can contribute to breathlessness, especially with activity.
Sometimes silent
CAD can be present without obvious symptoms until a heart attack or another serious event occurs.
Possible heart attack: new or severe chest pain/pressure, shortness of breath, weakness, light-headedness, nausea, cold sweat, or pain/discomfort spreading to the arm or shoulder can be emergency symptoms. Seek emergency medical help immediately if you think you may be having a heart attack; do not wait for an online abbreviation explanation.
What raises the risk of coronary artery disease?
Risk is influenced by a combination of modifiable and non-modifiable factors. Public-health sources consistently emphasize blood pressure, cholesterol, smoking, diabetes, physical activity, body weight and family history.
Factors that can often be changed or managed
- High blood pressure
- Unhealthy cholesterol levels
- Smoking
- Diabetes or high blood sugar
- Physical inactivity
- Unhealthy dietary patterns
- Overweight or obesity
Factors you cannot change
- Age
- Family history of heart disease
- Genetic and inherited risk
- Some demographic factors associated with population-level risk
Terminology point: having a risk factor does not mean a person has CAD. Diagnosis depends on clinical evaluation and, when needed, heart testing.
Tests you may see near CAD in a medical record
Healthcare professionals diagnose coronary heart disease using symptoms, medical and family history, risk factors and heart tests. The exact test depends on the clinical situation; no single test is automatically required for everyone.
| Term | What it does | How it relates to CAD |
|---|---|---|
| ECG / EKG | Records the heart’s electrical activity. | Can be part of the evaluation for heart problems and ischemia-related changes. |
| Coronary calcium scan | A CT-based test that measures calcium in coronary artery walls. | Can help assess coronary disease risk in selected people. |
| Stress test | Evaluates the heart while it works harder, with exercise or medication. | Can help identify reduced blood flow to heart muscle. |
| CCTA | Coronary CT angiography images the coronary arteries. | Can show coronary anatomy and narrowing using CT imaging. |
| Coronary angiography | Uses contrast dye and cardiac catheterization to visualize coronary blockages. | Often used when other findings suggest a higher likelihood of significant CAD or when invasive assessment is needed. |
Do not diagnose yourself from one test label. An ECG, calcium score, CT report or angiography result has to be interpreted with symptoms, history and other clinical information.
CAD terms that often appear in treatment plans
Treatment for coronary heart disease depends on symptoms, disease severity and other health conditions. Plans may include lifestyle changes, medicines and procedures. These abbreviations describe common terms you may encounter; they are not treatment recommendations for an individual reader.
PCI
Percutaneous coronary intervention. A catheter-based procedure used to open narrowed or blocked coronary arteries; a stent may be placed.
CABG
Coronary artery bypass grafting. Surgery that creates a new route for blood around blocked coronary arteries.
Cardiac rehabilitation
A medically supervised program that can support recovery and heart-health management after certain cardiac events or procedures.
CAD medical abbreviation FAQs
What does CAD mean in medical terms?
CAD most commonly means coronary artery disease, especially in cardiology, primary care and cardiovascular records. It describes disease affecting the coronary arteries that supply the heart muscle.
Is CAD the same as coronary heart disease?
The terms are often used interchangeably in patient education and everyday clinical communication. CAD emphasizes disease of the coronary arteries, while coronary heart disease emphasizes the resulting heart disease and reduced blood supply.
Can CAD mean cold agglutinin disease?
Yes. In hematology, CAD can mean cold agglutinin disease, a rare autoimmune hemolytic anemia. Context such as anemia, hemolysis, cold exposure, IgM or complement points toward the hematology meaning.
Can CAD mean something in radiology?
Yes. Radiology and medical-imaging literature may use CAD for computer-aided diagnosis or computer-aided detection. Imaging, algorithm and lesion-detection wording usually makes that meaning clear.
What causes coronary artery disease?
Atherosclerotic plaque buildup is the common cause described in patient-health resources, but the NLM MeSH concept is broader and also recognizes congenital and non-atherosclerotic causes of coronary artery disease.
What is the most common symptom of coronary artery disease?
Angina—chest pain or discomfort—is a common symptom. Shortness of breath can also occur, and CAD may sometimes be silent until a heart attack or another complication occurs.
Does CAD always mean a heart attack?
No. CAD is coronary artery disease, while a heart attack is myocardial infarction. CAD can increase the risk of a heart attack, but the two terms are not synonyms.
How do doctors diagnose CAD?
Diagnosis is based on symptoms, medical and family history, risk factors and appropriate tests. Depending on the situation, tests may include ECG, coronary calcium scanning, stress testing, coronary CT angiography, cardiac MRI/PET or invasive coronary angiography.
What does “history of CAD” mean?
In a cardiology or general medical chart, “history of CAD” usually means the person has a known history of coronary artery disease. The exact diagnosis and severity should be confirmed from the full medical record rather than the abbreviation alone.
When is CAD an emergency?
The abbreviation itself is not an emergency. However, symptoms that may indicate a heart attack—such as new or severe chest pressure, shortness of breath, weakness, light-headedness, nausea, cold sweat or arm/shoulder discomfort—need urgent medical assessment.
Authoritative sources used for this CAD definition
Review note: this page was refreshed on October 4, 2026. The primary abbreviation meaning, NLM coding, major alternate medical meanings and key coronary-disease context were checked against the sources above.