How to Produce a Readable Electrocardiogram.

In the course of his work at the Johannesburg Hospital and as Chief Medical Consultant to several South African insurance companies, the author had occasion to see innumerable electrocardiograms which had been misinterpreted because of technical errors due to improper registration techniques. This book, prompted by Dr. H. E. Ungerleider, to whom it is dedicated, sets down the experience of the author in recognizing and preventing these errors. Although designed primarily for the physician in practice who takes his own electrocardiograms, the book is written in a language clear and simple enough for the nurse or electrocardiographic technician to understand and follow.

In the first chapter the electrocardiographic machines now in use are briefly described and evaluated and the requirements of an ideal machine outlined. The electrocardiographic accessories such as the cables, electrodes, and electrode pastes are also discussed. The second chapter contains a brief description of the routine electrocardiographic