Delayed contrast enhancement cardiac magnetic resonance imaging in trastuzumab induced cardiomyopathy.
BACKGROUND
Trastuzumab (Herceptin), an antagonist to the human epidermal growth factor 2 (HER2) receptor significantly decreases the rates of breast cancer recurrence and mortality by 50%. Despite therapeutic benefits, the risk of cardiotoxicity with trastuzumab ranges from 10-15% when administered sequentially following anthraycline chemotherapy. Little is known about the utility of cardiac magnetic resonance (CMR) in the assessment of trastuzumab mediated cardiomyopathy.


RESULTS
Between 2005-2006 inclusive, 160 breast cancer patients were identified at a single tertiary care oncology centre. Of the total population, 10 patients (mean age 40 +/- 8 years) were identified with trastuzumab induced cardiomyopathy, based on a LVEF less than 40% on serial MUGA or echocardiography. CMR was performed in all patients to determine LV volumes, systolic function and evidence of late gadolinium enhancement (LGE). At the time of diagnosis of trastuzumab induced cardiomyopathy, the mean LVEF was 29 +/- 4%. Subepicardial linear LGE was present in the lateral portion of the left ventricles in all 10 patients.


CONCLUSIONS
LGE-CMR is a novel way of detecting early changes in the myocardium due to trastuzumab induced cardiotoxicity.
Fallah-Rad
Nazanin
N
Institute of Cardiovascular Sciences, St, Boniface Research Centre, University of Manitoba, Winnipeg, Manitoba, Canada. umfallah@hotmail.com
Lytwyn
Matthew
M
Fang
Tielan
T
Kirkpatrick
Iain
I
Jassal
Davinder S
DS
D000328:Adult; D000911:Antibodies, Monoclonal / Q000009:adverse effects*; D061067:Antibodies, Monoclonal, Humanized; D000970:Antineoplastic Agents / Q000009:adverse effects*; D001943:Breast Neoplasms / Q000188:drug therapy*; D009202:Cardiomyopathies / Q000139:chemically induced*; D003287:Contrast Media; D004452:Echocardiography; D005260:Female; D019786:Gadolinium DTPA; D006801:Humans; D008279:Magnetic Resonance Imaging / Q000379:methods*; D008875:Middle Aged; D000068878:Trastuzumab
D000911:Antibodies, Monoclonal; D061067:Antibodies, Monoclonal, Humanized; D000970:Antineoplastic Agents; D003287:Contrast Media; D019786:Gadolinium DTPA; D000068878:Trastuzumab