1977 Volume 14 Issue 1 Pages 21-30
Recording of His bundle electrogram (HBE) including atrial overdrive suppression test was carried out in 57 patients (28 males and 29 females). In 27 cases of them atrioventricular block was observed, in 19 cases bundle branch block and in 11 cases sick sinus syndrome (SSS). 33 cases of them (57.9%, ) were over 60 years as shown in Table 1. The conduction abnormalities within the His bundle, in the His-Purkinje system and in both of them went on increasing with advancing years and were closely correlated with Adams-Stokes attacks. In sick sinus syndrome, sinus node recovery time (SRT) exceeding 1.4sec. was observed in all cases, but SRT was not always strictly correlated with Adams-Stokes attacks. HBE and SRT with overdrive suppression test were very useful for the diagnosis of the conduction disturbances, but routine electrocardiographic evaluation and careful observations of clinical symptomes were also necessary to predict the prognosis of these diseases.
