There are limited contemporary data on the management and outcomes of acute myocardial infarction (AMI) in patients with concomitant acute respiratory infections. Hence, using the National Inpatient Sample from 2000-2017, adult AMI admissions with and without concomitant respiratory infections were identified. We evaluated in-hospital mortality, utilization of cardiac procedures, hospital length of stay, hospitalization costs, and discharge disposition. Among 10,880,856 AMI admissions, respiratory infections were identified in 745,536 (6.9%). Temporal trends revealed a relatively stable tr end with a peak during 2008-2009. Admissions with respiratory infections were on average older (74 vs. 67 years), female (45% vs 39%), with greater comorbidity (mean Charlson comorbidity index 5.9 ± 2.2 vs 4.4 ± 2.3), and had higher rates of non-ST-segment-elevation AMI presentation (71.8% vs. 62.2%) (all p < 0.001). Higher rates of cardiac arrest (8.2% vs 4.8%), cardiogenic shock (10.7% vs 4.4%), and acute organ failure (27.8% vs 8.1%) were seen in AMI admissions with respiratory infections. Coronary angiography (41.4% vs 65.6%, p < 0.001) and percutaneous coronary intervention (20.7% vs 43.5%, p < 0.001) were used less commonly in those with respiratory infections. Admissions with respiratory infections had higher in-hospital mortality (14.5% vs 5.5%; propensity matched analysis: 14.6% vs 12.5%; adjusted odds ratio 1.25 [95% confidence interval 1.24-1.26], p < 0.001), longer hospital stay, higher hospitalization costs, and less frequent discharges to home compared to those without respiratory infections. In conclusion, respiratory infections significantly impact AMI admissions with higher rates of complications, mortality and resource utilization.
Saraschandra Vallabhajosyula, Sri Harsha Patlolla, Dennis H Murphree, Wisit Cheungpasitporn, David R Holme, Bernard J Gersh