Abstract 15132: Inpatient Outcome of Infective Pericarditis in the United States: An Analysis From National Inpatient Sample 2016-2017

Abstract

Introduction: Infective pericarditis is a relatively uncommon condition in the modern antibiotic era, has a high mortality rate (20-30%) and is associated with immunosuppression, alcohol use, illicit drug use, thoracic surgery. Outcomes data in the current era is unknown. We aim to analyze the baseline characteristics and outcomes of patients admitted in the hospital with infective pericarditis. Methods: We conducted a retrospective study using National Inpatient Sample (NIS) database from 2016 to 2017. Hospital visits with a primary diagnosis of infective pericarditis (ICD10, I30.1) during which a pericardial procedure was performed were identified using ICD-10-CM and ICD-10-PCS Codes. Our primary outcome was basic characteristics and in-hospital all-cause mortality. Multivariate regression model was used to adjust for the pericardial procedure approach, age, and cardiac tamponade. R (Version 3.6.1) was utilized for the analysis. Results: A total of 1010 weighted hospitalizations in adult patients with infective pericarditis were identified. The mean age was 56.7±1.1 years (woman - 41.4%). The baseline characteristics and comorbidities are described in table 1 and table 2. 60.5% of the patients underwent percutaneous pericardial drainage, 36.4% had open surgery, and 3.2% had VATs. The mean time from admission to a pericardial procedure is 1.7±0.2 days. In-hospital all-cause mortality was 2.27%. The mean length of stay was 7.59±0.43 days. The mean total cost was 22530±1193 US dollars. Among all hospitalizations, 61.8% of them were complicated by hemodynamic instability and 56.8% had cardiac tamponade. Compared to pericardiocentesis, patients who underwent pericardiotomy had a higher mortality (5% vs 0.8%, adjusted OR 8.03, P = 0.043). Conclusions: Our study demonstrates relatively low inpatient mortality with infective pericarditis compared to older studies. Around half of the patients had cardiac tamponade.