PURPOSE
To better understand the combined effects of pre-transplant, transplant, and post-transplant factors in determining risks of serious cardiovascular disease following hematopoietic cell transplantation (HCT).
METHODS
Hospitalizations and deaths associated with serious cardiovascular outcomes were identified among 1,379 Washington State residents who received HCT (57% allogeneic; 43% autologous) at a single center from 1985–2005, survived ≥2 years, and followed through 2008. Using a nested-case-cohort design, relationships (hazard ratios, HR) between potential risk factors and outcomes were examined among affected survivors and a randomly selected sub-cohort (n=509).
RESULTS
After 7.0 years median follow-up (range 2.0–23.7), the 10-year cumulative incidence of ischemic heart disease, cardiomyopathy, stroke, and all-cause cardiovascular death was 3.8%, 6.0%, 3.5%, and 3.7%, respectively. In multivariable analysis, increased pre-transplant anthracyclines was associated with cardiomyopathy. Active chronic graft vs. host disease was associated with cardiovascular death (HR 4.0, 95% CI 1.1–14.7); risk was otherwise similar between autologous vs. allogeneic HCT recipients. Independent of therapeutic exposures, pre-transplant smoking, hypertension, dyslipidemia, diabetes, and obesity conferred additional risk of all outcomes except stroke (HR ≥1.5 for each additional risk factor, p<0.03). Hypertension and dyslipidemia at one year with persistence of these conditions two or more years following HCT also were associated with independent risks of multiple outcomes.
CONCLUSION
Hematopoietic cell transplant survivors with pre-existing or newly developed and persistent cardiovascular risk factors remain at greater risk of subsequent serious cardiovascular disease compared with other survivors, independent of chemo- and radiotherapy exposures. These survivors should receive appropriate follow-up and be considered for primary intervention.