An Integrating Circuit for Measurement of the Areas of the Waves in the Electrocardiogram | Zendy

Franklin D. Johnston | Zendy; Richard McFee | Zendy; Joseph M. Bryant | Zendy

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An Integrating Circuit for Measurement of the Areas of the Waves in the Electrocardiogram

Author(s) -

Franklin D. Johnston,

Richard McFee,

Joseph M. Bryant

Publication year - 1950

Publication title -

circulation

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 7.795

H-Index - 607

eISSN - 1524-4539

pISSN - 0009-7322

DOI - 10.1161/01.cir.2.1.5

Subject(s) - qrs complex , medicine , electrocardiography , orientation (vector space) , cardiology , mathematics , geometry

An electronic circuit capable of integrating the electrocardiogram is described. The net areas of the QRS complex, the T wave and of the entire ventricular complex, QRS-T, in the standard leads may be estimated by measurement of the length of two vertical lines in each of the integrated records. The manifest areas of QRS, T and the gradient (QRS-T) with the orientation of these vectors are easily calculated from the data. An example of an integrated electrocardiogram is reproduced, and the procedure for estimation of the gradient is presented.

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