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Funding Acknowledgements Type of funding sources: None. Background Carfilzomib improves the prognosis of multiple myeloma (MM) patients, but significantly increases cardiovascular toxicity. The timing and effect of carfilzomib therapy on left ventricular function is still under investigation. Purpose We sought to assess the echocardiographic systo-diastolic changes, including global longitudinal strain (GLS), in patients treated with carfilzomib and to identify predictors of increased risk of cardiovascular adverse events (CVAEs) during therapy. Methods 88 patients with MM performed a baseline cardiovascular evaluation comprehensive of transthoracic echocardiogram (TTE) before the start of Carfilzomib therapy and after about 6 months. All patients were clinically followed-up to early identify the occurrence of CVAEs for the whole therapy duration. Results After Carfilzomib treatment, mean GLS slightly decreased (-22.2% ± 2.6 vs -21.3% ± 2.5; p &amp;lt; 0.001). 58% of patients experienced CVAEs during therapy: 71% of them had uncontrolled hypertension, 29% had major CVAEs or CV events not related to arterial hypertension. GLS variation during therapy was not related to an increased risk of CVAEs; however, patients with baseline GLS ≥ -21% and/or left ventricular ejection fraction (LVEF) ≤ 60% had an increased risk of major CVAEs (OR = 6.2, p = 0.004;  OR = 3.7, p = 0.04, respectively). Carfilzomib led to an increased risk of diastolic dysfunction (5.6% vs 13.4% p = 0.04) and to a rise in E/e’ (8.9 ± 2.7 vs 9.7 ± 3.7; p = 0.006). Conclusions Carfilzomib leads to early LV function impairment early demonstrated by GLS changes and diastolic dysfunction. Baseline echocardiographic parameters, especially GLS and LVEF, might improve cardiovascular risk stratification before treatment.

Echocardiographic systolic and diastolic function alterations in multiple myeloma patients treated with Carfilzomib