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Medical instrumentation · Feb 1988
Ambulatory monitoring of the ST segment, using direct-recording Holter systems.
- J Brose, G Flachenecker, and A Frey.
- Institute for High Frequency Techniques, Faculty of Electrical Engineering, University of the Bundeswehr Munich, Federal Republic of Germany.
- Med Instrum. 1988 Feb 1; 22 (1): 2-11.
AbstractDirect-recording ambulatory electrocardiographic monitoring systems may produce serious errors not only because of their restricted bandwidth, but even more because of the "half-wavelength-to-head-contact effect." This article describes an easy measurement procedure and a mathematic model of the storage medium. The frequency response is calculated by way of five data from a single measurement. Some errors of typical recorders are discussed with the help of synthesized electrocardiographs. Measurements by six different recorders are listed.
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