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Biomedical subjects

A Bolz

Publications and source records attributed to A Bolz.

76 records · Page 5Linked to original sources
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[Support of prevention medicine techniques with the help of telemedical monitoring].

Prevention medicine should not be limited to regular preventive diagnosis in a prevention center. Expecially for patients with a known increased risk a mobile telemonitoring would be benefitial. This telemonitoring continuously measures certain vital parameters, detects negative changes or even acute risks with an inbuilt intelligence (smart sensor) and sends alarm messages to the prevention center. This paper presents firsts products already available on the market, analyses weaknesses and draws a scenario of a future telemedical system for preventive purposes. One focus is the development of mobile hubs, that provide the communication with the mobile sensors and that at the same time allow a tracking or positioning of the patient.

Computer Communication Networks↗
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[Analysis of myocardial evoked potentials in relation to ergometric load and heart rate for use in frequency-adaptive cardiac pacemakers].

The aim of this study was to evaluate the ventricular evoked response (VER) measured with unipolar fractally coated pacing leads for use with rate-responsive pacemakers. To this end, the morphology of the VER, its variation with pacing rate and various levels of physical loading, and the long-term stability of the signal were studied using the telemetric features of implantable pacemakers. Fractally coated electrodes were used in order to minimize the stimulation artefact, thus enabling a reliable unipolar measurement of the VER. The VER shows uniform basic morphology, and remains virtually unchanged after 3 months; moreover, frequency and load-dependent changes of VER morphology were identical for all patients. A special programming device has been developed to evaluate a rate adaptive algorithm for optimizing the pacing rate to the current loading situation, and was successfully tested in two patients. The algorithm was shown to be capable of calculating a heart rate adequate for haemodynamic demand.

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