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Sarcoma
Volume 2017 (2017), Article ID 7495914, 6 pages
https://doi.org/10.1155/2017/7495914
Research Article

Early Evidence of Cardiotoxicity and Tumor Response in Patients with Sarcomas after High Cumulative Dose Doxorubicin Given as a Continuous Infusion

1Department of Cardiology, University of Texas MD Anderson Cancer Center, 1515 Holcombe Blvd., Unit 1451, Houston, TX 77030, USA
2Division of Hematology/Oncology, Department of Medicine, Medical University of South Carolina, Charleston, SC 29425, USA
3Department of Sarcoma Medical Oncology, University of Texas MD Anderson Cancer Center, 1515 Holcombe Boulevard, Unit 450, Houston, TX 77030, USA

Correspondence should be addressed to Raymundo A. Quintana; ude.yrome@tniuqar

Received 16 June 2017; Accepted 20 August 2017; Published 26 September 2017

Academic Editor: Fritz C. Eilber

Copyright © 2017 Raymundo A. Quintana et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Background. Despite the dose-dependent response rate of sarcomas to doxorubicin, clinicians limit its cumulative dose due to cardiotoxicity. This study evaluates early evidence of cardiotoxicity in patients treated with high-dose doxorubicin given as a continuous infusion. Methods. Data was collected on patients who received 90 mg/m2 doxorubicin as a continuous infusion and 10 gm/m2 ifosfamide for up to 6 cycles as part of a phase II study. Cardiotoxicity was assessed with serial echocardiograms or multigated acquisition scans and serum brain natriuretic peptide and troponin levels. Tumor responses were determined by serial radiographic imaging per RECIST. Result. Out of the 48 patients enrolled, no patient developed heart failure symptoms; however, 4 out of the 38 (10%) patients with serial left ventricular ejection fraction assessments developed subclinical cardiotoxicity (asymptomatic drop in LVEF ≥ 10%). Twenty-three patients received all six 72-hour cycles of doxorubicin with a mean cumulative dose of 540 mg/m2. Among these patients, 4% () developed subclinical cardiotoxicity. In the advanced disease group (), patients with a complete or partial response received a higher mean cumulative dose than those with stable disease (). Conclusions. Doxorubicin cardiotoxicity can be limited by administering doxorubicin as a continuous infusion, allowing higher cumulative dosing to maximize efficacy.