Left Ventricular Assist Device in Patients With Alcohol Abuse or Illicit Drug Use

      The impact of substance abuse, including alcohol abuse or illicit drug use, on outcomes after left ventricular assist device (LVAD) implantation, has not been fully elucidated. Accordingly, to test the hypothesis that such a history would be associated with worse outcomes, we analyzed the Interagency Registry for Mechanically Assisted Circulatory Support registry. All patients from the Interagency Registry for Mechanically Assisted Circulatory Support registry who received a continuous-flow LVAD from June 2006 to December 2017 were included. The median follow-up duration was 12.9 months (interquartile range, 5.3 to 17.5). The final study group consisted of 15,069 patients, of which 1,184 (7.9%) had a history of alcohol abuse and 1,139 (7.6%) had a history of illicit drug use. The overall mortality rates in the alcohol, illicit drug, and control groups were 25%, 21%, and 29%, respectively. Cox regression analysis showed that having a history of alcohol abuse (hazard ratio, 0.97, 95% confidence interval, 0.84 to 1.13, p = 0.72) or illicit drug use (hazard ratio, 1.02, 95% confidence interval, 0.86 to 1.21, p = 0.81) was not significantly associated with increased risk of all-cause mortality when compared with general LVAD population. On the contrary, after adjusting for other covariates, a history of alcohol abuse or illicit drug use was significantly associated with increased device malfunction/pump thrombosis, device-related infection, or all-cause hospitalization (all p <0.05). Furthermore, After LVAD implantation, these patients had a lower quality of life assessed by the Kansas City Cardiomyopathy Questionnaire compared with those who did not. In conclusion, our findings suggest that patients with a history of alcohol abuse or illicit drug use are at risk for adverse device-related events with a lower quality of life after continuous-flow LVAD implantation compared with the general LVAD population.
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