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C Zeelenberg

Publications and source records attributed to C Zeelenberg.

5 recordsLinked to original sources
PubMed1992

The European ST-T database: standard for evaluating systems for the analysis of ST-T changes in ambulatory electrocardiography.

The project for the development of the European ST-T annotated Database originated from a 'Concerted Action' on Ambulatory Monitoring, set up by the European Community in 1985. The goal was to prototype an ECG database for assessing the quality of ambulatory ECG monitoring (AECG) systems. After the 'concerted action', the development of the full database was coordinated by the Institute of Clinical Physiology of the National Research Council (CNR) in Pisa and the Thoraxcenter of Erasmus University in Rotterdam. Thirteen research groups from eight countries provided AECG tapes and annotated beat by beat the selected 2-channel records, each 2 h in duration. ST segment (ST) and T-wave (T) changes were identified and their onset, offset and peak beats annotated in addition to QRSs, beat types, rhythm and signal quality changes. In 1989, the European Society of Cardiology sponsored the remainder of the project. Recently the 90 records were completed and stored on CD-ROM. The records include 372 ST and 423 T changes. In cooperation with the Biomedical Engineering Centre of MIT (developers of the MIT-BIH arrhythmia database), the annotation scheme was revised to be consistent with both MIT-BIH and American Heart Association formats.

Algorithms↗
PubMed1978

Computer analysis of oximetry data in cardiac catheterization.

An on-line computer technique is described for the detection and quantitation of left-to-right shunts. The computer used Student's t test to evaluate the probability that variations in right heart oxygen saturations were due to left-to-right shunts. The computer method was found to compare favorably to the present step-up method of detecting left-to-right shunts. The computer also calculated pulmonary blood flow, systemic blood flow, their ratio, and shunt blood flow as accurately as standard methods, as evidenced by correlation coefficients of 0.98, 0.94, 0.95, and 0.71 between the computer and hand calculations.

Cardiac Catheterization↗
PubMed1977

Automatic data processing in the cardiac catheterization laboratory.

A review of automatic data processing in the cardiac catherization lab is presented. The emphasis placed on on-line manometry, indicator dilution and off-line quantitative ventriculography. The system organization is described and several specific examples given to illustrate the level of detail necessary to specify such a system. The clinical use of the system is described together with an evaluation of the original design goals in terms of the actual performance of the system. A few unexpected benefits have emerged with respect to quality control and reliability, but one of the original design goals, speeding up the catheterization procedure, has proven to be unrealistic. The next logical steps in the software and hardware evolution are described with the emphasis placed on making the system a more effective tool for the clinician.

Cardiac Catheterization↗
PubMedDate not supplied

The Unibed patient monitoring system: a new approach for a new technology.

The Unibed patient monitoring system represents a new approach to the design of medical instrumentation based upon recent advances in microcomputer and related large-scale integration technology. This system is intended to replace an entire range of traditional monitoring devices with a single general-purpose unit capable of recognizing the nature of the signal source and performing appropriately. All of the usual switches, knobs, dials, and meters have been replaced by a touch-sensitive character display. The hardware responsible for physiological signal analysis, information display, and user interaction is actually a set of firmware modules implemented in terms of microcomputer programs. This firmware gives the system its functional personality and transforms it from a compact process-control system into a useful medical instrument. Prototypes are now being clinically tested and evaluated at the Dijkzigt Academic Hospital, Rotterdam, Netherlands.

Computers↗