Characteristics and Outcomes of Methamphetamine Abuse Among Veterans With Heart Failure

Abstract

Methamphetamine is one of the most commonly abused illicit substances worldwide. Chronic methamphetamine abuse (MA) is associated with the development of a dilated cardiomyopathy. MA in patients with heart failure (MethHF) is increasingly reported yet poorly characterized. This was a retrospective cohort study of veterans treated at the VA Medical Center in San Diego between 2005 and 2015 with a diagnosis of HF and a history of MA. The incidence of MA each year was calculated, and clinical characteristics and outcomes of veterans with HF with and without MA were compared. Among 9,491 veterans with HF, 429 were identified as having a history of MA. Between 2006 and 2015, the incidence of MA in veterans with HF doubled from 3.44% to 6.70%. Of the 429 identified, 106 veterans had a hospitalization for HF and they were compared with veterans with HF without evidence of MA (HF). Compared with veterans with HF, veterans with MethHF were significantly younger (60.7 ± 7.3 vs 71.6 ± 11.6 years, p <0.001), with more frequent co-morbid post-traumatic stress disorder (16.8% vs 4.4%, p = 0.006), depression (28.7% vs 11.0%, p = 0.002), homelessness (27.9% vs 8.9%, p = 0.001), and unemployment (55.8% vs 30.0%, p <0.001). Despite their younger age, veterans with MethHF had high rates of HF readmission or emergency room visit (49% vs 38% in MethHF vs HF, p = 0.34) and mortality at 6 months (27% vs 38% in MethHF vs HF, p = 0.10) compared with HF. In conclusion, MA in veterans with HF is on the rise. Certain demographic and clinical characteristics of veterans with MethHF may contribute to their poor outcomes.