. Diseases of the heart and arterial system; Designed to be a practical presentation of the subject for the use of students and practitioners of medicine. ned High-Tension Pulse from a Woman, Aged Sixty-three, withChronic Interstitial Nephritis. The following sphygmogram (Fig. 128) may be considered asfairly representing the average in chronic interstitial nephritis,and is typical of those oftenest encountered in this affection. In this connection it is fair for me to state that, highly as I value thesphygmograph, it is my opinion that its tracings in chronic interstitial nephritishave been ac
. Diseases of the heart and arterial system; Designed to be a practical presentation of the subject for the use of students and practitioners of medicine. ned High-Tension Pulse from a Woman, Aged Sixty-three, withChronic Interstitial Nephritis. The following sphygmogram (Fig. 128) may be considered asfairly representing the average in chronic interstitial nephritis,and is typical of those oftenest encountered in this affection. In this connection it is fair for me to state that, highly as I value thesphygmograph, it is my opinion that its tracings in chronic interstitial nephritishave been accorded, in some quarters, a diagnostic value altogether beyondtheir merits. This is not to the discredit of the instrument, for it afiords the 822 DISEASES OF THE HEART best practicable means for quickly and conveniently estirnating and permanentlyrecording the state of the circulation, cardiac energy, peripheral resistance,arterial resilience, and arterial tension. On the contrary, this fictitious valueusually depends upon a faulty appreciation of the infinite variations of thepulse in health and disease, and in the same person at different Fio. 128.—Fkom a Man, Aued Fuktv-five, with Ciiitoxic Intekstitial Nephritis. The rhythm of the pulse is very clearly and only satisfactorilyshown by the sphygmograph. In health, the rhythm, in every par-ticular, is fairly but not absolutely regular. A moments reflec-tion upon the ])liysiology of the cardiac cycle and the vaso-motormechanism should lead us to expect this, and an inspection of any
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