Patient Characteristics and Clinical Outcomes of Type 1 Versus Type 2 Myocardial Infarction.

Abstract Background Type 2 myocardial infarction (MI) patients may have different characteristics and outcomes when compared with type 1 MI. Objectives The purpose of this study was to compare patients with type 1 MI to those with type 2 MI in the United States. Methods Using the Nationwide Readmissions Database, MI patients were categorized over the 3 months following the introduction of an International Classification of Diseases-10th Revision code specific for type 2 MI. Baseline characteristics and inpatient and post-discharge outcomes among both cohorts were compared. Results There were 216,657 patients with type 1 MI, 37,765 patients with type 2 MI, and 1,525 patients with both type 1 and 2 MI. Patients with type 2 MI were older (71 years vs. 69 years; p  Conclusions Patients with type 2 MI have a unique cardiovascular phenotype when compared with type 1 MI, and are managed in a heterogenous manner. Validated management strategies for type 2 MI are needed.