Summary:Cardiotoxicity has rarely been reported as a complication of melphalan or fludarabine administration as single agents. Recently, melphalan and fludarabine have been used in combination as non-myeloablative conditioning chemotherapy prior to allogeneic stem cell transplantation. We have observed the development of severe left ventricular failure in three of 21 patients treated with this combination. Cardiotoxicity in this context has not previously been reported and has implications for the assessment, monitoring and treatment of patients undergoing pre-transplant conditioning with melphalan and fludarabine. Bone Marrow Transplantation (2001) 28, 101-103. Keywords: emlphalan; fludarabine; BMT; cardiotoxity The alkylating agent melphalan, either alone or in combination with other agents such as busulphan and total body irradiation, has been widely used in myeloablative conditioning regimens prior to stem cell transplantation for diseases such as multiple myeloma, 1 non-Hodgkin lymphoma 2 and Hodgkin's disease. 3 The clinical utility of melphalan has recently been extended by the development of nonmyeloablative transplant regimens intended to exploit the graft-versus-tumour effect of allogeneic T cell chimerism whilst reducing the toxicities associated with myeloablative conditioning. 4 Non-myeloablative regimens have seen melphalan used in novel combinations with agents such as the purine analogue, fludarabine. 5 The application of these novel regimens is particularly attractive in patients considered too old for standard allografts.It is conceivable that these regimens may lead to unexpected toxicities due to the cumulative or synergistic effects of the individual drugs, particularly in an older patient population. Although cardiac dysfunction is well described with other alkylating agents such as cyclophosphamide, 6 single-agent melphalan has not been shown to affect cardiac contractility in prospective studies. also only been rarely associated with cardiac dysfunction, with a single report of non-fatal congestive heart failure in two of 27 patients treated for chronic lymphocytic leukaemia. 8 Conditioning regimens combining fludarabine and melphalan have been associated with veno-occlusive disease and mucosal toxicity, but development of cardiotoxicity had not been specifically assessed in earlier reports. 5,9 Recently, in an updated series, reduced-intensity conditioning with melphalan and purine analogues was associated with the development of Bearman grade 3-4 cardiotoxicity in four of 86 patients. 10 The clinical features of cardiotoxicity in this setting have not, however, been documented. We describe the development of severe left ventricular failure (LVF) in three of 21 patients undergoing non-myeloablative stem cell transplantation (NMSCT) following conditioning with these agents.
Case reportsTwenty-one patients have undergone NMSCT following conditioning with melphalan and fludarabine at our institution for multiple myeloma (11), chronic lymphocytic leukaemia (3), chronic myeloid leukaemia (2),...