Publications by authors named "R Vianna"

Introduction: In Solid Organ Transplant (SOT) recipients, due to immunosuppression, the immunogenicity after COVID-19 vaccination is suboptimal and its durability is unknown.

Methods: We conducted a post-hoc analysis of a patient-blinded, single center, randomized controlled trial comparing BNT162b2 vs JNJ-78436735 as the third dose after two doses of BNT162b2 in adult SOT recipients with active graft to compare long-term immunogenicity.

Results: Forty-one recipients were analyzed.

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This study aimed to evaluate the association between microcephaly and hearing disorders in children with exposed or suspected exposure to Zika virus (ZIKV) during the intrauterine period. In this cross-sectional study, we enrolled children exposed or suspected of being exposed to ZIKV during intrauterine period, admitted to the hospital between April 2016 and July 2018, and followed up until September 2021. All children underwent at least one automated auditory brainstem response (AABR) test.

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Objective: To analyze longitudinal changes between two brain magnetic resonance imaging (MRI) exams performed one year apart in symptomatic infants with congenital Zika syndrome (CZS) and normocephalic infants exposed to the Zika virus (ZIKV) prenatally.

Materials And Methods: This was a prospective observational study. Infants born to women who tested positive for ZIKV on reverse transcription-quantitative polymerase chain reaction during pregnancy were classified into two groups: symptomatic infants with CZS and asymptomatic infants.

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Background: The postoperative period of heart valve surgery is challenging due to the risk of bleeding, leading to complications and increased morbidity and mortality.

Objective: To develop a risk score to predict bleeding in patients after valve surgery.

Methods: Retrospective study of patients operated on between 2021 and 2022.

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