Louis N. Katz and Herman K. Hellerstein wrote a scholarly discussion on the evolution of our knowledge of electrocardiography and published it in Circulation of the Blood: Men and Ideas edited by Fishman and Richards.[1]* Interested readers will be spellbound to discover how early observers gradually began to understand that lightning, lodestone, amber (when rubbed), and the torpedo fish had something in common - - electricity! Apparently, the torpedo fish was the subject of great interest. Bancraft, in 1676, suggested that the strange fish was capable of delivering a shock of electricity.[2] John Walsh,[3] John Hunter,[4] and Henry Cavendish[5]supported Bancraft's contention. Accordingly, it was gradually accepted that.
