A process and a device for regulating the stimulation frequency of heart pacemakers are disclosed. The process comprises generating with the aid of light emitted by a light-emitting element, reflected by the blood of a patient, and received by a light-receiving element, a current flow which causes, in...http://www.google.es/patents/US4399820?utm_source=gb-gplus-sharePatente US4399820 - Process and device for regulating the stimulation frequency of heart pacemakers
Process and device for regulating the stimulation frequency of heart pacemakers
