Abstract
Background: Prior studies have demonstrated a rising incidence of infective endocarditis related stroke (IERS) in the US due to the opioid epidemic. The Greater Cincinnati/Northern Kentucky (GCNK) region has one of the highest opioid abuse rates in the nation. A modern epidemiologic description is necessary to understand the impact of the opioid epidemic on the clinical phenotype of IERS. Methods: Using the GCNK Stroke Study, all patients hospitalized with IERS in 2005, 2010, and 2015 were abstracted and physician reviewed. IERS was defined as an acute stroke clinically attributed to infective endocarditis in patients meeting modified Duke Criteria for possible or definite endocarditis. Comparison between years were by chi-square or Fisher’s exact test for categorical variables; ANOVA or Kruskal-Wallis test for numerical variables. Cochran-Armitage test was used to examine trend. Secondary analysis compared characteristics between intravenous drug users (IVDU) and non-IVDU. Results: A total of 54 patients with IERS were identified in 2005, 2010, and 2015. Over the period, there was a significant decline in hypertension (91.7% in 2005, 36.0% in 2015; p=0.0005) and increase in IVDU (8.3% in 2005, 44.0% in 2015; p=0.02). They trended towards increased white race, younger age, and fewer vascular risk factors. Compared to non-IVDU, IVDU were significantly younger (41.1±14.1vs 63.1±14.3 years; p<0.001), less often female (12.5% vs 47.4%; p=0.02), had higher rates of sepsis (50% vs 18.4%; p=0.04), less atrial fibrillation (0% vs 31.6%; p=0.01), and less renal disease (0% vs 23.7%; p=0.045). The incidence of IERS per 100,000 increased from 1.31 (CI: 0.56-2.06) in 2005, to 1.66 (CI: 0.87-2.45) in 2010, and to 2.41(CI:1.46-3.36) in 2015. Conclusion: From 2005 to 2015, IERS was increasingly associated with IVDU and an absence of hypertension. These trends likely reflect the demographics of the opioid epidemic, which has affected younger patients with less comorbidities.
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