Platelet activation with the Aeson Bioprosthetic Total Artificial Heart: insight from aspirin treatment and outcomes

Introduction The Aeson bioprosthetic total artificial heart (A-TAH) is a pulsatile and autoregulated device. The aim of this study was to evaluate the level of platelet activation secondary to A-TAH implantation. Methods We examined the level of platelet activation markers in adult patients receiving A-TAH support (n=16) during clinical follow-up by quantifying sP-selectin (sP-sel) and sCD40L in plasma. Results The cumulative duration of A-TAH support was 3587 days. Before implantation, sCD40L was 2684.6 pg/mL (954.0-16706.1) and remained steady after implantation [3305.8 pg/mL (1234.2-12327.5), 3300.5 pg/mL (1041.5-8370.1), and 2560.0 pg/mL (1325.5-14039.5), respectively, at 6 months; non-significant difference along time-period]. sP-sel was 33997.0 pg/mL (16019.6-73377.6) and remained steady after implantation [33580.1 pg/mL (13979.8-53395.2), 33204.9 pg/mL (15332.6-67263.4), and 34684.5 pg/mL (14084.9-49206.0), respectively, at 6 months; non-significant difference along time-period]. Levels sP-sel and sCD40L analysed according to aspirin or heparin use did not change. Finally, no relation existed between pericardial effusion and aspirin use according to timing of aspirin start and drain removal. Conclusions We demonstrated that A-TAH does not induce significant platelet activation. Absence of relationship between aspirin and platelet activation levels or pericardial effusion may support potential for withdrawal of antiplatelet therapy after A-TAH implantation in the future.