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Deprecated: Implicit conversion from float 231.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 Clin+Cancer+Res 2014 ; 20 (24): 6314-23 Nephropedia Template TP
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Screening for cardiac dysfunction in anthracycline-exposed childhood cancer survivors #MMPMID24947931
Clin Cancer Res 2014[Dec]; 20 (24): 6314-23 PMID24947931show ga
Purpose: To examine the utility and reliability of obtaining early echocardiographic measurements of left ventricular (LV) remodeling as well as blood biomarkers of cardiac injury in asymptomatic childhood cancer survivors at risk for LV dysfunction and congestive heart failure due to past exposure to anthracycline chemotherapy. Experimental Design: Using a cross-sectional design, anthracycline-exposed childhood cancer survivors with preserved EF (?50%) were evaluated using early echocardiographic indices and blood biomarkers of LV dysfunction. Survivors treated with ?300mg/m2 anthracyclines (high-risk [HR]: n=100) were compared with: i) those treated with <300 mg/m2 anthracyclines (low-risk [LR]: n=50) and matched healthy controls (HC: n=50). All echocardiograms were interpreted by an institutional cardiologist and a study cardiologist blinded to risk status. Results: Time from diagnosis was comparable for HR (12.0y) and LR (13.2y, p=0.8) survivors. Echocardiograms: HR had lower LV thickness-dimension ratio (Z-score: HR: ?0.62, LR: ?0.03, HC: ?0.02; p<0.001), increased LV wall stress (HR: 66.7 g/cm2, LR: 56.6 g/cm2, HC: 54.2 g/cm2; p<0.01) and higher myocardial performance index (HR: 0.51, LR: 0.46, HC: 0.46; P<0.01). Inter-observer correlation (clinical/blinded reading) for all echocardiographic indices was excellent (range: R=0.76-0.97, p<0.001). Blood biomarkers: With the exception of NT-proBNP (r=0.28, p<0.01), there was no correlation between blood biomarkers (BNP, Troponin-T, ST-2, Galectin-3) and LV dysfunction. Conclusion: Childhood cancer survivors with preserved EF 10+years from anthracycline exposure had dose-dependent changes in echocardiographic markers of LV dysfunction.