Cardiotoxicity from anti-HER-2 therapies in patients with HER-2 positive breast cancer

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Natalia Camejo-Martínez http://orcid.org/0000-0002-8684-0291
Cecilia Castillo-Leska http://orcid.org/0000-0002-0417-0512
Valeria Rodríguez-Saenz http://orcid.org/0000-0001-8333-2438
Guadalupe Herrera-Álvarez http://orcid.org/0000-0001-6888-2343
Dahiana Amarillo-Hernández http://orcid.org/0000-0002-8615-8639
María Carolina Dörner-Cabrera http://orcid.org/0000-0003-3758-2545
Gabriel Krygier-Waltier http://orcid.org/0000-0002-0518-1854

Keywords

c erbB 2 Protein, Breast Neoplasms, Cardiotoxicity, Uruguay

Abstract

Background: HER-2 positive (+) breast cancer (BC) accounts for 20-25% of BC, it is more aggressive, and it has a lower survival rate. Since the approval of trastuzumab in 1998, other HER-2-targeted therapies such as pertuzumab and trastuzumab emtansine (TDM1) have been introduced, improving patient survival. However, cardiotoxicity is an adverse effect of these treatments.


Objective: To estimate the incidence of cardiotoxicity with trastuzumab, trastuzumab/pertuzumab, and TDM1 in women with HER-2 + BC treated over a 6-year period at the Hospital de Clínicas and the Hospital Departamental de Soriano.


Material and methods: Observational, descriptive, and retrospective study which included patients with HER-2 + BC treated with trastuzumab, trastuzumab/pertuzumab, or TDM1.


Results: 81 patients were included, with a cardiotoxicity incidence of 23.4%. Cardiotoxicity was determined by a > 10% decrease in left ventricular ejection fraction (LVEF) (57.9%) and a LVEF < 50% evident during treatment (42.1%). Only 1 patient presented symptomatic heart failure. 63.1% of those who discontinued treatment due to cardiotoxicity managed to resume it. No relationship was evident between cardiovascular history or the administration regimen and the development of cardiotoxicity.


Conclusion: The study showed a cardiotoxicity incidence similar to the international one. Most did not present cardiac toxicity, and if they did, it was asymptomatic and reversible.

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