Comments on "Threshold 60-Hz Current Required for Ventricular Fibrillation in Subjects of Various Body Weights

Lead vector theory of electrocardiography is used to estimate cardiac current density thresholds for ventricular fibrillation from reported data for current thresholds at the skin. The estimated value, which is of the order of 300??A/cm2 is consistent with results obtained by others with 60 Hz currents injected directly into the heart.