Circ J 2009; 73: 970 -973 ecause of progress in immunosuppressive therapy, heart transplantation is now the most effective treatment for end-stage heart failure. However, humoral rejection of the cardiac allograft is still a challenging problem associated with high incidence of graft loss and patient mortality. 1,2 We present a patient who developed severe cardiogenic shock from humoral rejection and who was successfully treated with a combination therapy consisting of plasmapheresis and pharmacological treatment including the anti-CD20 monoclonal antibody.
Case ReportA 45-year-old gentleman with dilated cardiomyopathy who had been supported by a Novacor left ventricular assist device (WorldHeart Corp, Oakland, CA, USA) for 709 days underwent orthotopic heart transplantation. Although he had received a transfusion of packed red blood cells and platelets at the time of left ventricular assist device implantation, his pretransplant panel reactive antibody (PRA) was 0% and the prospective direct crossmatch was negative. The harvesting procedure was uneventful, and the heart was transplanted using the standard bicaval method. Total graft ischemic time was 204 min. Methylprednisolone (500 mg) was given prior to aortic declamping. Although the appearance of the heart surface was almost normal after reperfusion, biventricular dysfunction of the graft occurred. The heart function did not recover with catecholamine support, and mechanical circulatory support with intraaortic balloon pump (IABP) and extracorporeal membranous oxygenation (ECMO) were required to wean him off the cardiopulmonary bypass. Postoperative plasma level of troponin T was 1.17 ng/ml (normal range <0.10 ng/ml) and creatine kinase MB isoenzyme was 62.6 ng/ml (normal range <5.0 ng/ml). The immunosuppressive therapy in the immediate postoperative phase consisted of intravenous injection of 3 doses of 125 mg methylprednisolone followed by daily injection of prednisolone (20 mg/day), and antithymocyte globulin (700 mg/day for 5 days). The grafted heart's function gradually improved, and the ECMO and IABP were removed 3 and 4 days after transplantation, respectively. The patient was extubated on the 5th postoperative day. The left ventricular ejection fraction (LVEF) increased from 37% on the 2nd postoperative day to 60% on the day of extubation. Oral administration of cyclosporine, mycophenolate mofetil, and prednisolone was initiated on the 6th postoperative day. On the 8th postoperative day, the patient suddenly developed profound cardiogenic shock, which required the re-establishment of the IABP and ECMO support (Figure 1). Echocardiography revealed diffuse severe hypokinesis (LVEF <10%) and the thickening of the wall of both ventricles. Humoral rejection was highly suspected, so intravenous steroid pulse therapy and plasmapheresis were started immediately. Endomyocardial biopsy revealed no cellular rejection (International Society of Heart and Lung Transplantation grade 0), but there was severe interstitial edema (Figures 2A, B). Complement compon...