An infarction is a medical condition that occurs when a region of tissue dies due to a lack of blood supply, often caused by a blockage in a blood vessel. This interruption can result from a clot or plaque buildup in arteries, leading to conditions like myocardial infarction (heart attack) or cerebral infarction (stroke). The affected tissue can suffer irreversible damage if blood flow is not restored quickly. Prompt medical intervention is crucial to minimize damage and improve outcomes.