Personal observations of 22 patients with permanent inhibited ventricular PM for SSS during the period July 1976-February 1979 and re-examined with electrophysiological study after a follow-up made for an average period 25,5 months (14 to 49 months), after PM inhibition from the outside are presented. Patients were divided into 2 groups (group 1 with bradycardia and group 2 with brady-tachy arrhythmia). In spite of relative exiguity and uniformity of this casuistry, the conclusion is drawn that CSNRT and atropine test were more significant than SACT, in particular in forms with less pathological electrophysiological parameters.