Nathaniel R Smilowitz1, Binita Shah2, Kurt Ruetzler3, Santiago Garcia4, Jeffrey S Berger5. 1. Leon H. Charney Division of Cardiology, Department of Medicine, New York University School of Medicine, New York; Cardiology Section, Department of Medicine, Veterans Affairs New York Harbor Health Care System, New York, NY. Electronic address: nathaniel.smilowitz@nyulangone.org. 2. Leon H. Charney Division of Cardiology, Department of Medicine, New York University School of Medicine, New York; Cardiology Section, Department of Medicine, Veterans Affairs New York Harbor Health Care System, New York, NY. 3. Department of Outcomes Research, Anesthesiology Institute, Cleveland Clinic, Cleveland, Ohio. 4. Minneapolis Heart Institute at Abbott Northwestern Hospital, Minneapolis, Minn. 5. Leon H. Charney Division of Cardiology, Department of Medicine, New York University School of Medicine, New York; Department of Surgery, New York University School of Medicine, New York.
Abstract
BACKGROUND: Perioperative myocardial infarction is frequently attributed to type 2 myocardial infarction, a mismatch in myocardial oxygen supply-demand without unstable coronary artery disease. Our aim was to identify characteristics, management, and outcomes of perioperative type 1 versus type 2 myocardial infarction among surgical inpatients. METHODS: Adults age ≥45 years hospitalized for noncardiac surgery were identified in the United States. Perioperative myocardial infarction were identified using International Classification of Diseases, 10th revision (ICD-10) codes. Clinical characteristics, invasive myocardial infarction management, mortality, and readmissions were assessed by myocardial infarction subtype. RESULTS: Among 4,755,382 surgical hospitalizations, we identified 38,975 perioperative myocardial infarctions (0.82%), with type 2 infarction in 42%. Patients with type 2 myocardial infarction were older, more likely to be women, and less likely to have cardiovascular comorbidities compared with type 1 myocardial infarction. Fewer patients with type 2 myocardial infarction underwent invasive management than type 1 myocardial infarction (6.7% vs 28.8%, P < .001). Type 2 myocardial infarction mortality was lower than type 1 myocardial infarction mortality (12.1% vs 17.4%, P < .001; adjusted odds ratio [aOR] 0.51, 95% confidence interval [CI] 0.45-0.59). Invasive management of perioperative myocardial infarction was associated with lower mortality in type 1 (aOR 0.56, 95% CI 0.49-0.74) but not type 2 (aOR 1.19, 95% CI 0.77-1.85) myocardial infarction. Among survivors, there was no difference in 90-day hospital readmission between type 2 and type 1 perioperative myocardial infarction (36.5% vs 36.1%, P = .72). CONCLUSIONS: Type 2 myocardial infarctions account for approximately 40% of perioperative myocardial infarctions. Patients with type 2 perioperative myocardial infarction are less likely to undergo invasive management and have lower mortality compared with those with type 1 perioperative myocardial infarction. Published by Elsevier Inc.
BACKGROUND: Perioperative myocardial infarction is frequently attributed to type 2 myocardial infarction, a mismatch in myocardial oxygen supply-demand without unstable coronary artery disease. Our aim was to identify characteristics, management, and outcomes of perioperative type 1 versus type 2 myocardial infarction among surgical inpatients. METHODS: Adults age ≥45 years hospitalized for noncardiac surgery were identified in the United States. Perioperative myocardial infarction were identified using International Classification of Diseases, 10th revision (ICD-10) codes. Clinical characteristics, invasive myocardial infarction management, mortality, and readmissions were assessed by myocardial infarction subtype. RESULTS: Among 4,755,382 surgical hospitalizations, we identified 38,975 perioperative myocardial infarctions (0.82%), with type 2 infarction in 42%. Patients with type 2 myocardial infarction were older, more likely to be women, and less likely to have cardiovascular comorbidities compared with type 1 myocardial infarction. Fewer patients with type 2 myocardial infarction underwent invasive management than type 1 myocardial infarction (6.7% vs 28.8%, P < .001). Type 2 myocardial infarction mortality was lower than type 1 myocardial infarction mortality (12.1% vs 17.4%, P < .001; adjusted odds ratio [aOR] 0.51, 95% confidence interval [CI] 0.45-0.59). Invasive management of perioperative myocardial infarction was associated with lower mortality in type 1 (aOR 0.56, 95% CI 0.49-0.74) but not type 2 (aOR 1.19, 95% CI 0.77-1.85) myocardial infarction. Among survivors, there was no difference in 90-day hospital readmission between type 2 and type 1 perioperative myocardial infarction (36.5% vs 36.1%, P = .72). CONCLUSIONS: Type 2 myocardial infarctions account for approximately 40% of perioperative myocardial infarctions. Patients with type 2 perioperative myocardial infarction are less likely to undergo invasive management and have lower mortality compared with those with type 1 perioperative myocardial infarction. Published by Elsevier Inc.
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