the possible short-term effects of cyclosporine on the heart were studied in 42 endomyocardial biopsies taken at the time of high levels of cyclosporine in the blood , in 20 biopsies at low blood cyclosporine levels , and in 44 biopsies taken from patients on a conventional ( before cyclosporine ) regimen of azathioprine and steroids after heart transplantation .
C0018787
heart
C0018823
heart transplantation