[Evaluating the graft rejection reaction in endomyocardial biopsy].

Transplant survival is the result of a balance between natural defence mechanisms and their suppression by drugs. A grading system of allograft rejection should characterize this equilibrium quantitatively. The system developed by McAllister evaluates graft rejection on a numerical scale ranging from 0 to 10. This scale enhances communication between the pathologist, surgeon and cardiologist. In our experience with more than 1000 biopsies of 80 patients the Texas scale is useful.