Epidemiology of in-hospital cardiac arrest complicating non-ST-segment elevation myocardial infarction receiving early coronary angiography.

In the period between 2000 and 2014, 584,704 admissions with non-ST-segment elevation myocardial infarction that received early coronary angiography (day zero) were identified from the National Inpatient Sample. In-hospital cardiac arrest was noted in 4349 (0.8%), of which ~47% were from ventricular arrhythmias and ~90% of occurred within ≤4 days. Non-ST-segment elevation myocardial infarction admissions with in-hospital cardiac arrest had higher in-hospital mortality compared to those without (61% vs. 1.6%) with an unchanged temporal trend of in-hospital cardiac arrest rates (adjusted odds ratio 1.29 [95% confidence interval 0.73-2.28]) in 2014 compared to 2000).