Resumen

ACEVES-VELAZQUEZA, Eduardo; VIEYRA-HERRERAB, Gerardo; RODRIGUEZ-CHAVEZB, Laura  y  HERRERA-ALARCONC, Valentín. Evaluation of the antithrombotic strategy in low thrombotic risk patients who underwent aortic valve replacement with a bioprosthesis. Arch. Cardiol. Méx. [online]. 2018, vol.88, n.5, pp.339-346.  Epub 04-Dic-2020. ISSN 1665-1731.  https://doi.org/10.1016/j.acmx.2017.06.009.

According to current guidelines, in patients without additional risk factors who have undergone aortic valve replacement with a bioprosthesis, anticoagulation in the first 3 months after surgery is still a matter of debate. According to current evidence, aspirin in low doses is a reasonable alternative to vitamin K antagonists (VKA).

A comparison is made between the incidence of thrombotic and haemorrhagic complications in patients with low thrombotic risk who underwent aortic valve replacement with a bioprosthesis in the National Institute of Cardiology of Ignacio Chávez of Mexico. The hypothesis: aspirin as monotherapy has a beneficial effect compared to VKA.

The studied patients were the low thrombotic risk patients who underwent aortic valve replacement with a bioprosthesis in the National Institute of Cardiology of Ignacio Chávez of Mexico from 2011 to 2015. The groups studied were: aspirin only, VKA only, and the combination of VKA plus aspirin. The patients were retrospectively followed-up for 12 months, and the thrombotic and haemorrhagic complications were documented.

Of the 231 patients included in the study, only one patient in the VKA only group presented with a haemorrhagic complication. No thrombotic complications were observed.

In the present study no thrombotic complications were observed in patients who did not receive anticoagulation in the first 3 months after an aortic valve replacement with a bioprosthesis after a follow up period of 12 months. This suggests that the use of aspirin only is safe during this period.

Palabras llave : Aortic valve replacement; Bioprosthesis; Anticoagulation; Valvular thrombosis; Vitamina K antagonist; Aspirin; Mexico.

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