The subject of heart-block and the recent additons to the knowledge of the allied functional disturbances of the heart and of the so-called cardiac neuroses have aroused a great deal of interest in the revelations from tracings of the venous pulse and polygraphic tracings. Although with appropriate apparatus1 these are somewhat less difficult to obtain than are good radial pulse tracings, some form of rather expensive polygraph is necessary, and about half an hour is required to obtain the desired record.2 Nevertheless so much information is to be gained by what they show that this procedure can scarcely be omitted from the modern routine examination of heart cases.
It is, therefore, natural that efforts should be made to minimize the labor involved in such investigation, and in this regard the recent contribution of Dr. G. W. McCaskey3 marks an attempt toward simplicity. By means of the Mackenzie
HIRSCHFELDER AD. INSPECTION OF THE JUGULAR VEIN; ITS VALUE AND ITS LIMITATIONS IN FUNCTIONAL DIAGNOSIS.A CRITICISM BY DR. HIRSCHFELDER AND A REPLY BY DR. McCASKEY. I. A CRITICISM.. JAMA. 1907;XLVIII(13):1105–1107. doi:10.1001/jama.1907.25220390033002