Apparatus for recognising rejection of transplanted hearts.

摘要

Apparatus for recognising rejection of transplanted hearts digitalises analogue signals which are obtained when carrying out endocardial or epicardial sensing of the heart and carries out a first differentiation of the digitalised signals. A gradient pattern detector compares the differentiated signals thereby produced with signals of like origin produced when the heart was newly transplanted with respect to amplitude and, optionally, interval, as well as possibly polarity and sequence of amplitudes. Lower amplitudes and slew rates will be indicative of the recipient's body reaction against the implanted heart. The results of the comparison will be transmitted to recording and storage means and/or the patient will be alerted to the rejection which is taking place.