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Cardiotoxicity associated with the cancer therapeutic agent sunitinib malate
M L Telli1, R M Witteles, G A Fisher
1Division of Medical Oncology, Department of Medicine, Stanford University, 875 Blake Wilbur Drive, Stanford, CA 94305, USA.
Background:
In the pivotal phase III metastatic renal cell carcinoma trial, updated data indicates that 21% of sunitinib-treated patients experienced a decline in left ventricular ejection fraction to below normal. This cardiotoxicity was reported to be reversible and without clinical sequelae. We conducted a retrospective analysis of our institutional experience of cardiotoxicity with sunitinib after observing a high incidence of symptomatic heart failure.
Patients And Methods:
Patients receiving sunitinib at Stanford University from 1 July 2004 to 1 July 2007 were identified. Medical records were reviewed and those patients experiencing symptomatic grade 3/4 left ventricular systolic dysfunction were identified. Potential cardiac risk factors were analyzed.
Results:
Forty-eight patients treated with sunitinib were assessable. Seven patients experienced symptomatic grade 3/4 left ventricular dysfunction 22-435 days after initiation of sunitinib. Three patients had persistent cardiac dysfunction after discontinuation of sunitinib and initiation of heart failure therapy. A history of congestive heart failure, coronary artery disease and lower body mass index were factors associated with increased risk.
Conclusions:
Among patients treated with sunitinib at our institution, 15% developed symptomatic grade 3/4 heart failure. Future studies of sunitinib-related cardiotoxicity are urgently needed, particularly as the oncologic indications for this drug continue to expand.
Insights
Sunitinib treatment for metastatic renal cell carcinoma can cause symptomatic heart failure in 15% of patients. Risk factors include prior heart failure and coronary artery disease, necessitating further research into sunitinib cardiotoxicity.
Area of Science:
- Cardiology
- Oncology
Background:
- Sunitinib is used for metastatic renal cell carcinoma.
- A phase III trial reported reversible left ventricular ejection fraction decline in 21% of patients.
- A high incidence of symptomatic heart failure prompted this institutional review.
Purpose of the Study:
- To analyze the incidence and risk factors of sunitinib-induced cardiotoxicity.
- To evaluate symptomatic heart failure in patients treated with sunitinib.
Main Methods:
- Retrospective analysis of patients treated with sunitinib at Stanford University (2004-2007).
- Identification of patients with symptomatic grade 3/4 left ventricular systolic dysfunction.
- Analysis of potential cardiac risk factors.
Main Results:
- Seven out of 48 assessable patients (15%) developed symptomatic grade 3/4 left ventricular dysfunction.
- Cardiac dysfunction occurred 22-435 days after sunitinib initiation.
- History of congestive heart failure, coronary artery disease, and lower BMI were associated with increased risk.
Conclusions:
- Sunitinib treatment resulted in symptomatic heart failure in 15% of patients at this institution.
- Three patients experienced persistent cardiac dysfunction despite treatment.
- Further research on sunitinib cardiotoxicity is crucial given its expanding oncologic use.
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