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Abstract
We reviewed outcomes in 82 consecutive children supported with the Berlin Heart pulsatile ventricular assist device (VAD), comparing those with functionally univentricular circulation (n = 34) to those with biventricular circulation (n = 48). The primary outcome was mortality. Kaplan-Meier (KM) methods and log-rank tests were used to assess group differences in long-term survival. T-tests using KM-estimated survival proportions and standard errors were used to compare groups at specific time points. 48 biventricular patients were supported (Age: median = 1.4 years, range = 17 days-17.7 years; Weight [kilograms]: median = 9.4, range = 3.1-112), including 43 BiVAD, 4 LVAD only, and 1 LVAD converted to BiVAD. In biventricular patients, duration of VAD support [days]: median = 97, range = 4-315. Of 48 biventricular patients, 35 underwent heart transplantation, 7 died on VAD, 5 weaned off VAD (1 of whom underwent heart transplantation 334 days after weaning), and 1 is still on VAD. 34 univentricular patients were supported with single VAD (sVAD) (Age: median = 38.5 days, range = 4 days-13.3 years; Weight [kilograms]: median = 3.98, range = 2.4-32.6). In univentricular patients, duration of VAD support [days]: median = 138, range = 4-554. Of 34 univentricular patients, 22 underwent transplantation, 11 died on VAD, and 1 is still on VAD. One-year survival after VAD insertion was 82.7% (95% CI = 72.4-94.4%) in biventricular patients and 59.7% (95% CI = 44.9-79.5%) in univentricular patients, p = 0.026. Five-year survival after VAD insertion was 79.7% (95% CI = 68.6-92.6%) in biventricular patients and 50.5% (95% CI = 35.0-73.0%) in univentricular patients, p = 0.010. Pulsatile VAD facilitates bridge to transplantation in neonates, infants, and children with functionally univentricular circulation; however, survival is worse than in patients with biventricular circulation.
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