Gregory J Cascino1, Woo Bin Voss2, Jonathan Canaani3, Nicholas Furiasse1, Alfred Rademaker4, Bonnie Ky5, Selina Luger6, Jessica K Altman7, James M Foran8, Mark R Litzow9, Martin S Tallman10, Vera Rigolin1, Nausheen Akhter1. 1. Division of Cardiovascular Medicine, Department of Medicine, Feinberg School of Medicine, Northwestern University, Chicago, Illinois. 2. Department of Cardiology, North Shore Hospital, Auckland, New Zealand. 3. Hematology Division, Chaim Sheba Medical Center, Tel Aviv University, Tel Aviv, Israel. 4. Department of Preventative Medicine, Feinberg School of Medicine, Northwestern University, Chicago, Illinois. 5. Division of Cardiovascular Medicine, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania. 6. Abramson Cancer Center, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania. 7. Division of Hematology/Oncology, Department of Medicine, Feinberg School of Medicine, Northwestern University, Chicago, Illinois. 8. Division of Hematology, Mayo Clinic, Jacksonville, Florida. 9. Division of Hematology, Mayo Clinic, Rochester, Minnesota. 10. Division of Hematologic Oncology, Sloan Kettering Memorial Cancer Center, New York, New York.
Abstract
BACKGROUND: Patients with acute myeloid leukemia (AML) are surviving longer. There are no data on changes in myocardial mechanics from standard of care low-dose anthracycline-based induction chemotherapy in older patients with AML. The aim of this study was to demonstrate the potential utility of strain imaging in detecting early changes in left ventricular function in this patient population after induction chemotherapy. METHODS: Thirty two patients enrolled in the ECOG-ACRIN E2906 study (cytarabine and daunorubicin vs clofarabine [Genzyme/Sanofi]) from 2011 to 2014 were evaluated retrospectively. Two-dimensional transthoracic echocardiography (TTE) imaging with Doppler and two-dimensional speckle-tracking echocardiography (2DSTE) using EchoInsight software (Epsilon imaging) were performed before and after induction chemotherapy. RESULTS: Eighteen patients received cytarabine and daunorubicin (7 + 3) and 14 received clofarabine. The clofarabine group was older than the 7 + 3 cohort (67.8 ± 4.0 vs 63.7 ± 3.8, P = .007). There were no other significant differences in cardiac risk factors between groups. The 7 + 3 group had a decrease in average peak systolic global longitudinal (-19.1 ± 2.8 to -17.2 ± 3.0, P = .01) and circumferential strain (-29.4 ± 6.3 to -23.9 ± 4.3, P = .011). These changes were not demonstrated in the clofarabine group and were not associated with a decline in left ventricular ejection fraction (LVEF). CONCLUSIONS: In older AML patients, standard cytarabine and daunorubicin chemotherapy causes early changes in global longitudinal and circumferential strain not seen with clofarabine therapy. These findings demonstrate subclinical left ventricular dysfunction after exposure to low cumulative doses of anthracycline-based induction chemotherapy and may help us better identify those patients at risk for adverse long-term cardiovascular outcomes.
BACKGROUND:Patients with acute myeloid leukemia (AML) are surviving longer. There are no data on changes in myocardial mechanics from standard of care low-dose anthracycline-based induction chemotherapy in older patients with AML. The aim of this study was to demonstrate the potential utility of strain imaging in detecting early changes in left ventricular function in this patient population after induction chemotherapy. METHODS: Thirty two patients enrolled in the ECOG-ACRIN E2906 study (cytarabine and daunorubicin vs clofarabine [Genzyme/Sanofi]) from 2011 to 2014 were evaluated retrospectively. Two-dimensional transthoracic echocardiography (TTE) imaging with Doppler and two-dimensional speckle-tracking echocardiography (2DSTE) using EchoInsight software (Epsilon imaging) were performed before and after induction chemotherapy. RESULTS: Eighteen patients received cytarabine and daunorubicin (7 + 3) and 14 received clofarabine. The clofarabine group was older than the 7 + 3 cohort (67.8 ± 4.0 vs 63.7 ± 3.8, P = .007). There were no other significant differences in cardiac risk factors between groups. The 7 + 3 group had a decrease in average peak systolic global longitudinal (-19.1 ± 2.8 to -17.2 ± 3.0, P = .01) and circumferential strain (-29.4 ± 6.3 to -23.9 ± 4.3, P = .011). These changes were not demonstrated in the clofarabine group and were not associated with a decline in left ventricular ejection fraction (LVEF). CONCLUSIONS: In older AMLpatients, standard cytarabine and daunorubicin chemotherapy causes early changes in global longitudinal and circumferential strain not seen with clofarabine therapy. These findings demonstrate subclinical left ventricular dysfunction after exposure to low cumulative doses of anthracycline-based induction chemotherapy and may help us better identify those patients at risk for adverse long-term cardiovascular outcomes.
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