I22: Subsequent myocardial infarction

The term "Subsequent myocardial infarction" refers to a group of heart conditions that occur when a part of the heart doesn't get enough blood due to blockage in one or more of the coronary arteries. This is typically a second or repeated episode, hence the term "subsequent". The direct cause is often a blood clot that blocks the blood flow. The affected part of the heart may be damaged or die due to the lack of oxygen and nutrients, leading to what's known as a heart attack or myocardial infarction. Common symptoms include chest pain or discomfort, often described as a heavy pressure, squeezing or tightness, which may spread to the arms, neck, jaw or back. Other symptoms can include shortness of breath, fatigue, lightheadedness or sudden dizziness, and nausea or vomiting. If not treated promptly, a myocardial infarction can lead to severe heart damage, heart failure or life-threatening arrhythmias.