Abstract 17288: Clinical Outcomes of Hyponatremia in Patients Undergoing TAVR - A National Inpatient Sample Database
Introduction: The in-hospital outcomes and complications of hyponatremia in patients who are undergoing transcatheter aortic valve replacement (TAVR) remains uncertain. Hypothesis: Hyponatremia effect on TAVR outcomes Methods: We queried National Inpatient Sample (NIS) (2011-2014) using the International Classification of Disease, Ninth Edition, Clinical Modification (ICD-9-CM) codes for TAVR and hyponatremia (level<135 mEq/L). Categorical and continuous variables were reported as percentages and weighted means and were compared using unadjusted odds ratio (OR) and t-test, respectively. Univariate and multiple logistic regression analyses were used to control the outcomes variables. Results: A total of 33790 (no-hyponatremia 31683, hyponatremia 2107; ,mean age = 81 year) patients were included. The unadjusted odds for in-hospital mortality (5.7% vs. 3.8%, uOR 0.43, 95% CI, 0.23-0.618, p=<0.001) and new-onset seizures (0.5% vs. 0.2%%, uOR 2.15; 95% CI, 1.02-4.18, P = 0.037) were significantly higher for patients with hyponatremia compared to no-hyponatremia, respectively. Intriguingly, patients with hyponatremia had significantly higher odds of developing cardiopulmonary arrest (4.9% vs. 3.0%, uOR 0.53; 95% CI, 0.33-0.74, P=<0.001) compared to patients without hyponatremia. The odds for cerebral herniation and in-hospital new-onset coma (0.2% vs 0.2%, uOR 0.31 ;95% CI, 0.60-1.2, P = 0.69) did not differ significantly between the two groups. The adjusted odds ratio based on baseline comorbidities (hypertension, renal failure, diabetes, history of seizures), demographics (race, hospital, month of admission) and age followed the unadjusted odds ratios. Outcome differences of complications of TAVR with or without hypernatremia are shown in figure 1. (bue= without hyponatremia; red=hyponatremia). Conclusions: Patients with hyponatremia undergoing TAVR have higher odds of all-cause mortality, seizures and cardiopulmonary arrest.