Frontline Lenalidomide for AL Amyloidosis Involving Myocardium

"As single arm study, patients will be treated as follows:~* Lenalidomide : D1\~D21 daily oral administration, starting dose 15mg, with an increase of 5mg every cycle, if tolerated, up to 25mg.~* Dexamethasone : D1\~D4 daily oral administration or intravenous injection, 40mg(or 20mg for age for age ≥ 65 years old) Patients will be treated every 4 weeks as one cycle, and up to 12 cycles of treatment will be conducted."