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Computerized arrhythmia monitoring system accuracy and borders of the nadia algorithm during routine electrocardiographic monitoring in an intensive care unit



Computerized arrhythmia monitoring system accuracy and borders of the nadia algorithm during routine electrocardiographic monitoring in an intensive care unit



Intensivmedizin 23(1): 27-33



We studied the accuracy of the Arrhythmia Monitoring System (HP 78525) using the NADIA-algorithm under the conditions of a coronary care unit. Two-hour periods of ECG monitoring of 27 patients in randomized order were analysed by comparing the trend output of the computer with a synchronous written ECG paper record of the complete period. Specificity of SVES detection was 99.9% with a sensitivity of 47.3% and predictive value of 86.8%, VES were detected with a specificity of 99.9%, a sensitivity of 94.9%, and a predictive values of 97.9%. Couplets were detected with 100% specificity, 88.8% sensitivity and 84.1% predictive value. Runs were detected with a specificity of 100%, sensitivity of 93% and a predictive value of 84.1%. Comparing our results with those given by the manufacturer and those yielded with Holter tape analysis systems, we found corresponding results. Some special problems of ECG analysis with the NADIA-algorithm are discussed.

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Accession: 005028075

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