Simplify the following text for a Grade 10 native English-speaking person.
Original: Myocardial infarction ( MI ) or acute myocardial infarction ( AMI ) , commonly known as a heart attack , is the interruption of blood supply to a part of the heart , causing heart cells to die .
Simplified: An acute myocardial infarction , also known as a heart attack , is a heart condition where blood can not get to part of the heart .