Improved 6 Minute Walk Distance and Brain-Type Natriuretic Peptide After Continuous-Flow Ventricular Assist Device Placement in Children

ASAIO Journal : a Peer-reviewed Journal of the American Society for Artificial Internal Organs
Jason F GoldbergAamir Jeewa

Abstract

Despite increasing continuous-flow ventricular assist device (CF-VAD) use in children, minimal data exist regarding the functional recovery and rehabilitation potential after device placement. We hypothesized that after CF-VAD implantation, children would demonstrate a time-limited improvement in 6 minute walk distance (6MWD) and brain-type natriuretic peptide (BNP). A retrospective cohort study of 27 patients was conducted, those <18 years of age at a tertiary-care center during the study period. Seventy-four percent were male; median age was 12.7 years. Six minute walk distance and BNP were evaluated within 365 days of implantation. Associations were examined before and after 90 days postimplantation because a plateau in both values was seen after 90 days. Data included 92 6MWD and 341 BNP values. In the first 90 days, 6MWD increased by 12 percent predicted (%P) per 30 days (P < 0.01); with no significant change thereafter, increasing 0.6 %P per 30 days (P = 0.482). In the first 90 days, BNP decreased by 59% per 30 days (P < 0.01); with no significant change thereafter, increasing 1.2% per 30 days (P = 0.561). Six minute walk distance and BNP improved after CF-VAD implantation, with a significant improvement only in the first...Continue Reading

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