Pacemaker probe

1. Method of controlling an implantable cardiac pacemaker, in which : the heart is stimulated at a basic frequency corresponding to the patient's demand for a normal degree of physical activity ; the patient's temperature is measured as a parameter linked to the degree of physical activity of the patient, and the stimulating frequency is modified in such a way that the stimulating frequency is increased or reduced when the temperature is respectively increased or reduced, the stimulating frequency varies between upper and lower limits, characterized in that the stimulating frequency is below the upper limiting frequency if the temperature exceeds a limiting temperature. La sonde de l'invention est destinée à un stimulateur cardiaque. Elle comprend à sa partie extrême libre une extrémité de stimulation (23). De plus elle comprend des moyens de mesure de la température telle qu'une thermistance (25) placée à la surface extérieure de la gaine (24a) entourant la sonde.