Trabectedin is a chemotherapeutic used to treat advanced soft tissue sarcoma and relapsed platinum-sensitive ovarian cancer. Although it is associated with a low incidence of cardiotoxicity, when this occurs it can be fatal or significantly compromise the quality of life in patients with advanced cancer. Here, we present a series of 4 cases where trabectedin-treated sarcoma patients developed cardiovascular complications. Similar to previous literature describing this association, all patients

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... ad prior treatment with anthracyclines and presented at different time points following treatment initiation. Each patient presented with exertional breathlessness and was found to have severely impaired left ventricular systolic function (ejection fraction ≤35%), and 1 patient had concurrent atrial fibrillation with a fast ventricular rate. All of the patients were treated with neurohormonal blockade, and a multi-disciplinary decision was made to stop trabectedin in 3 patients and continue in 1 patient. Two of the 4 patients had an improvement in their left ventricular systolic function. It is unclear what effect preceeding anthracycline or tyrosine kinase inhibitor treatment has in priming patients to develop cardiotoxicity in this setting. Our case series adds to the evidence surrounding this association and highlights that trabectedin-associated cardiotoxicity can present in an insidious fashion.