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| Echocardiogram | EF 64% with concentric thickening of the ventricle |
| Cardiac MRI | Infiltrative cardiomyopathy |
| NT-proBNP | Slightly elevated at 550 pg/mL |
| Troponin | 0.010 ng/L |
| Fat pad biopsy | Positive for Congo red stain |
| 24-hour urine | 1,500 Bence-Jones/total volume of proteinuria |
Note. EF = ejection fraction; NT-proBNP = N-terminal pro-brain natriuretic peptide.
