Diagnosis Code I21
Information for Medical Professionals
References found for the code I21 in the Index of Diseases and Injuries:
- Includes Notes: Includes Notes
This note appears immediately under a three character code title to further define, or give examples of, the content of the category.
- cardiac infarction
- coronary (artery) embolism
- coronary (artery) occlusion
- coronary (artery) rupture
- coronary (artery) thrombosis
- infarction of heart, myocardium, or ventricle
- myocardial infarction specified as acute or WITH "With"
The word “with” should be interpreted to mean “associated with” or “due to” when it appears in a code title, the Alphabetic Index, or an instructional note in the Tabular List. The word “with” in the Alphabetic Index is sequenced immediately following the main term, not in alphabetical order. a stated duration of 4 weeks (28 days) or less from onset
- Type 2 Excludes Notes: "And"
The word “and” should be interpreted to mean either “and” or “or” when it appears in a title.
- old myocardial infarction (I25.2)
- postmyocardial infarction syndrome (I24.1)
- subsequent myocardial infarction (I22.-)
Information for Patients
Also called: MI, Myocardial infarction
Each year over a million people in the U.S. have a heart attack. About half of them die. Many people have permanent heart damage or die because they don't get help immediately. It's important to know the symptoms of a heart attack and call 9-1-1 if someone is having them. Those symptoms include
- Chest discomfort - pressure, squeezing, or pain
- Shortness of breath
- Discomfort in the upper body - arms, shoulder, neck, back
- Nausea, vomiting, dizziness, lightheadedness, sweating
These symptoms can sometimes be different in women.
What exactly is a heart attack? Most heart attacks happen when a clot in the coronary artery blocks the supply of blood and oxygen to the heart. Often this leads to an irregular heartbeat - called an arrhythmia - that causes a severe decrease in the pumping function of the heart. A blockage that is not treated within a few hours causes the affected heart muscle to die.
NIH: National Heart, Lung, and Blood Institute
- Being active after your heart attack
- Cardiac catheterization
- Cardiac catheterization - discharge
- Heart attack
- Heart attack - discharge
- Learn What a Heart Attack Feels Like--It Could Save Your Life - NIH - Easy-to-Read (National Heart, Lung, and Blood Institute)
- Talk With Your Health Care Provider About Taking Aspirin to Prevent Heart Attack (Agency for Healthcare Research and Quality)
- Troponin test