Proteasome inhibitors such as carfilzomib are indicated in multiple myeloma patients showing relapse and/or refractoriness of clonal activity. However, this therapy has been associated with a significant incidence of cardiotoxicity, especially in patients with known cardiovascular risk factors. Here we report a case of a 60-year-old woman with multiple myeloma, who developed severe congestive heart failure with positive myocardial injury biomarkers together with impaired LVEF and GLS, after treatment with carfilzomib. Therefore, chemotherapeutic drug was discontinued and neurohormonal blocking and diuretic therapy was started resulting in amelioration of symptoms, without changes in LVEF but with significant GLS improvement. Although high-grade cardiotoxicity is relatively rare in patients with non previous cardiac risk factors, it was a predictable side effect of carfilzomib use. Recognition of this syndrome is critical to instauration of appropriate therapy and prevention of morbimortality.
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