What is meant by the term paroxysmal tachycardia is probably pretty well understood by the profession. It is not the purpose of this article to go into the study of the subject, but only to give the remedy. The name essential paroxysmal tachycardia has been given by recent authors to make the meaning more definite. By this term is meant a sudden jump of the heart beat from the normal to two or three times the normal rate. This rapid rate is maintained for a period of from a few minutes to many hours, and usually without any known cause, and is attended with a feeling of languor, lassitude, weakness and exhaustion. Up to the present no remedy has been discovered for this malady. In Nothnagel's Encyclopedia of Practical Medicine, in the volume on diseases of the heart, the author states: "Since we do not know what constitutes