Graphic methods in heart disease / By John Hay ... ; with an introduction by James Mackenzie.

  • Hay, John A., 1942-
Date:
1909
Catalogue details

Licence: In copyright

Credit: Graphic methods in heart disease / By John Hay ... ; with an introduction by James Mackenzie. Source: Wellcome Collection.

Provider: This material has been provided by Royal College of Physicians, London. The original may be consulted at Royal College of Physicians, London.

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    PREFACE Graphic methods of investigating the disorders and diseases of the heart have opened up numerous avenues of research, and it is now generally recognised that valuable information is obtained by such means, con- cerning diagnosis, prognosis and treatment. The value of sphygmographic tracings is slight in the absence of simultaneous records from the apex beat, jugular pulse or the liver, and all who confine them- selves to records of the radial pulse very soon realise the limitations and comparative barrenness of this field of investigation. It is very different, however, when combined records are taken : the vagaries of the heart are then full of meaning and interest ; they can be explained satis- factorily and their full import comprehended. An arrhythmia which was formerly viewed with vague distrust and misgiving is recognised as simple and harmless, while other variations from the normal, slight though they may be, are recognised as ominous and of moment. As difficulties are sure to be encountered by all