Clinical Edge

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Trastuzumab in Breast Cancer

Assessing cardiac risks

Cardiac toxic effects from paclitaxel with trastuzumab, manifesting as grade 3 or 4 left ventricle systolic dysfunction (LVSD) or asymptomatic left ventricle ejection fraction (LVEF) decline, were low, suggesting that LVEF monitoring during trastuzumab therapy without anthracyclines could be simplified for many individuals. This according to a study of 406 patients with node-negative, ERBB2-positive breast cancer. Researchers found:

• Overall, 2 patients developed grade 3 LVSD and came off study.

• 13 patients had significant asymptomatic LVEF decline, 11 of whom completed study treatment.

• Median LVEFs were: 65% at baseline; 64% at 12 weeks; 64% at 6 months; and 64% at 1 year.

Citation: Dang C, Guo H, Najita J, et al. Cardiac outcomes of patients receiving adjuvant weekly paclitaxel and trastuzumab for node-negative, ERBB2-positive breast cancer. [Published online ahead of print November 5, 2015]. JAMA Oncol. doi:10.1001/jamaoncol.2015.3709.