- Patients with evidence of amyloidosis (i.e., periorbital perforation, proteinuria not attributable to Bence-Jones protein, unexplained arrhythmias, increased liver function tests, peripheral neuropathy, carpal tunnel syndrome, and/or macroglossia) must have an ECHO, rather than MUGA, performed to evaluate for cardiac amyloidosis (septal thickness, diastolic dysfunction, granular sparkling, or low-voltage QRS complexes)