JOURNAL ARTICLE
OBSERVATIONAL STUDY
RESEARCH SUPPORT, NON-U.S. GOV'T
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Hepatitis B virus reactivation after heart transplant: Incidence and clinical impact.

BACKGROUND: Occult hepatitis B infection consists of persistence of HBV genomes in hepatocytes,absence of serum HBsAg, low/undetectable serum HBVDNA. Reactivation of HBV infection may occur during immunosuppression, but few data are available in heart transplant.

OBJECTIVES: We followed-up heart recipients with or without markers of previous HBV infection,evaluating prevalence of HBV markers, incidence of HBV reactivation and its virological and clinical features.

STUDY DESIGN: Heart failure patients listed for heart transplant (2007-2013) were screened for current or past HBV infection. Transplanted patients with past HBV infection (anti-HBc+/±anti-HBs+/HBVDNA-) were followed up as cases, and an equal number of HBV negative patients as controls. Virological reactivation was detected by standard real-time and home-made highly sensitive PCR (surface/core HBVDNA regions). Clinical status and progression were assessed by liver histology, ultrasound or elastography.

RESULTS: 67 patients underwent heart transplant, including 4 (5.9%) HBsAg+ subjects. Cases were 11/67 (16.4%). During a median follow-up of 30 months, only one of these 11 patients presented viral reactivation (HBVDNA 209IU/mL) at month 22, and started antiviral treatment. Four other recipients showed virological events of uncertain significance (sensitive PCR-only intermittently positive). Clinical signs of liver disease were observed in only one case at the last follow-up. A nonsignificant difference in survival was observed between cases and all other heart recipients without prior HBV contact (death rate 5/11 vs 15/52, respectively; p=0.097).

CONCLUSIONS: HBV genotypic reactivation in HBsAg-/anti-HBc+/HBVDNA- heart recipients is uncommon. Virological events of uncertain significance occur more frequently; their clinical impact seems to be negligible.

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