Types of MI

 Q: Myocardial Infarction (MI) due to mismatch between oxygen supply and demand is? (select one) 

A) Type 1 

B) Type 2 

C) Type 3 

D) Type 4  

E) Type 5 

 Answer: B

The Joint Task Force of the European Society of Cardiology, American College of Cardiology Foundation, the American Heart Association, and the World Heart Federation (ESC/ACCF/AHA/WHF) has proposed a clinical classification of MI according to assumed proximate cause of myocardial ischemia 

Type 1: MI due to acute atherothrombotic coronary artery disease and usually precipitated by atherosclerotic plaque disruption (rupture or erosion). 

Type 2: MI because of a mismatch between oxygen supply and demand. 

Type 3: Patients with MI based on EKG or ventricular fibrillation, and unexpected death before biomarkers can be detected. 

Type 4a: MI associated with percutaneous coronary intervention (PCI).

Type 4b: A subcategory of PCI-related MI, which is due to stent/scaffold thrombosis. 

Type 5: MI in relation to Coronary artery bypass graft (CABG) surgery.

The objective of this question is to broadly introduce the types of MI. For further reading access the reference below.

#cardiology

Reference:

Thygesen K, Alpert JS, Jaffe AS, et al. Fourth Universal Definition of Myocardial Infarction (2018). J Am Coll Cardiol 2018; 72:2231.