Final answer:
A patient with a myocardial infarction less than 3 months ago is typically classified as ASA IV, indicating severe systemic disease posing a constant threat to life, reflecting critical health status due to recent heart damage and coronary artery complications.
Step-by-step explanation:
The ASA classification of a patient who has had a myocardial infarction (MI), also known as a heart attack, less than 3 months ago would typically be classified as ASA IV. ASA IV indicates a patient with a severe systemic disease that is a constant threat to life. In this case, an MI within the past three months significantly increases the risk of perioperative morbidity and mortality, reflecting the patient’s critical health status due to possible damage to heart muscle and ongoing cardiovascular complications associated with recent coronary artery disease.