Spectral analysis of systemic arterial pressure and heart rate signals as a prognostic tool for the prediction of patient outcome in the intensive care unit

Huey Wen Yien, Shu Shya Hseu, Lih Chyn Lee, Terry B.J. Kuo, Tak Yu Lee, Samuel H.H. Chan

研究成果: 雜誌貢獻文章同行評審

147 引文 斯高帕斯(Scopus)

摘要

Objectives: To evaluate the applicability of changes in spectra of systemic arterial pressure and heart rate signals in the prediction of patient outcome in an adult intensive care unit (ICU). To compare the prognostic predictability of this method with the Acute Physiology and Chronic Health Evaluation II (APACHE II) scoring system. Design: Prospective data collection from 52 ICU patients. Setting: Adult ICU at a large, university-affiliated, medical center. Patients: Consecutive patients who were admitted to the adult ICU due to noncardiac emergencies, and who remained for at least 2 days. Interventions: None. Measurements and Main Results: The demographic data, diagnosis, and survival data were recorded for each patient enrolled in this study. For the period between admission and 24 hrs before discharge, the APACHE II score was tabulated daily. Likewise, continuous, on-line, and real-time spectral analysis of systemic arterial pressure and heart rate signals was carried out every day for at least 30 mins at 2200 to 2400 hrs. The averaged power density values during this 30- min recording period of the high-frequency (0.15 to 0.4 Hz), low-frequency (0.90 to 8.15 Hz), and very low-frequency (0.016 to 0.08 Hz) components of systemic arterial pressure and heart rate signals were subsequently computed. Systemic vascular resistance index and cardiac index were also determined daily. We observed a trend of changes in the spectral components of systemic arterial pressure and heart rate signals in patients who eventually survived (n = 25) or died (n = 27). Progressive increases in the power density values of both the low-frequency and very low-frequency components of systemic arterial pressure and heart rate signals appeared to be related to recovery. Conversely, progressive decreases in the power density values of these spectral components was indicative of deterioration and fatality. The predicted outcome based on the trend of changes in the low-frequency and very low-frequency components of systemic arterial pressure and heart rate signals correlated positively with daily APACHE II scores. No direct correlation, however, was indicated by mean systemic arterial pressure, heart rate, systemic vascular resistance index, and cardiac index. We also confirmed that the differential trend of spectral changes in patients who survived or died was not due to circadian rhythm, nor alterations in the responsiveness of the blood vessels to intravenous infusion of dopamine. Conclusion: Power spectral analysis of systemic arterial pressure and heart rate signals offers a reasonable means of monitoring acute, critically ill patients, and may be used as an alternative prognostic tool for the prediction of patient outcome in the ICU.
原文英語
頁(從 - 到)258-266
頁數9
期刊Critical Care Medicine
25
發行號2
DOIs
出版狀態已發佈 - 1997
對外發佈

ASJC Scopus subject areas

  • 重症監護和重症監護醫學

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