[Experience with the implantation of the Thermos 01 rate-adaptive pacemaker]

Authors summarise their 16 patient-years experience of eight Thermos 01 rate-adaptive pacemaker systems implanted in the Hungarian Institute of Cardiology. Data collected during regular control of the patients, exercise tests and Holter investigations are presented. Five of the 8 patients had better exercise capacity, but improvement over 25 Watt workload appeared only at two patients. Thermistor-controlled rate-adaptive pacing triggered by the central venous blood (CVB) temperature appeared beneficial for patients with predominant bradycardia. The thermoregulation sensor proved to be stable and has a good correlation to diurnal rhythm but it has a delay to short and intensive workload. The setting of the Thermos 01 is very time-consuming with the present algorithm of the software. It needs regular control and re-setting because of the marked individual differences among the patient's temperature profiles.