Using left ventricular peak systolic global longitudinal strain vs. left ventricular ejection fraction to survey patients undergoing potentially cardiotoxic chemotherapy with at least one other risk factor for heart failure showed no difference in the primary endpoint of the difference in ejection fraction between the two groups at one year.
A large population study has shown a U-shaped relationship between left ventricular ejection fraction (EF) and mortality, with a nadir at 60-65%. The authors identified a new group at high risk for death: those with an EF ≥ 70%.
Administering trastuzumab after a course of anthracycline therapy for breast cancer can result in cardiac toxicity. Serial echocardiograms in this study showed that a lower initial left ventricular ejection fraction before anthracycline therapy and the amount of decrease in ejection fraction after the anthracycline course are predictive of subsequent trastuzumab cardiac toxicity.