1980 Volume 50 Issue 6 Pages 306-309
As using the electrical fibrillator, it is desirable that the fivrillating current to the heart is little in terms of rejection of heart burns. The efficiency which the electrical fibrillator should have was important.Fibrillating threshold current to the heart was measured using frequency and wave form variable electrical fibrillator, which applied electrical current to 10 dog's hearts. Triangular, rectangular or sine wave was applied to the heart varing that frequency from 15 Hz to 500 Hz.The fibrillating thereshold current was in proportion to increasing of frequency, therefore low frequency current was more effective than that of high. Concerning with wave form, the triangular wave form was more effective than such one as rectangular or sine.