The invention relates to a portable medical device for assistance to heart patients carrying an implanted pacemaker, which includes at least one electric energy accumulator for power supply, at least one electronic card provided with a first wireless communication unit for the reception of data sent by the pacemaker, and a processing unit suited to process the data received from the pacemaker. The device further includes an external casing suited to be grasped by the patient in order to bring it to the pacemaker's transmission field and provided with at least one light signal for communicating the data processed by the processing unit at least partially to the patient.
