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Quantification in Echocardiography

Catharina Hospital Department of Anesthesiology and Intensive Care; Eindhoven University of Technology, Department of Electrotechnical Engineering, Signal Processing Group, The Netherlands

Massimo Mischi, PhD

Eindhoven University of Technology, Department of Electrotechnical Engineering, Signal Processing Group, The Netherlands

Rene J. E. Grouls, PhD

Department of Clinical Pharmacy, Catharina Hospital, The Netherlands

Annemiek Jansen, MD

Jan-Melle van Dantzig, MD, PhD

Kathinka Peels, MD

Department of Cardiology, Catharina Hospital, The Netherlands

Until recently, more than 2200 Swan Ganz catheters were used annually in the operating rooms (OR) and intensive care unit (ICU) of the Catharina Hospital in Eindhoven, The Netherlands. After cardiologists who were specialists in echocardiography (ECHO) trained anesthesiologists in ECHO, the need for these catheters in cardiac and noncardiac surgery was reduced. Initially intended as a local teaching project, an ECHO teaching compact disk (CD) was produced during the training and distributed later worldwide, thanks to a positive review in a major anesthesiology publication. By reducing the number of Swan Ganz catheters, the hospital could finance and acquire two echocardiography machines for the OR and ICU. The availability of these machines resulted in a further reduction of the number of Swan Ganz catheters. However, the need for quantification (eg, measurements of cardiac output) remained. During the creation of the ECHO teaching CD, the idea was born to apply indicator-dilution principles on injected echo contrast. This study was performed in cooperation with the Signal Processing Department of the Eindhoven University of Technology. Advanced signal processing and modelling were used to develop algorithms to enable quantification of intrapulmonary blood volume, ejection-fraction, and flow from the transesophageal echocardiography approach. These quantitative measurements, which can be performed on an outpatient basis, may become a real asset in cardiology, anesthesiology, and intensive care.

References

• Karaca EP, Schwarzenberger J: Practical echocardiography: The heart of the matter. Part 1, basics. Anesth Analg 92:285-286, 2001.[CrossRef]
• Mischi M, Jansen AHM, Korsten HHM, et al: Impulse response estimation of ultrasound-contrast-agent dilution systems for cardiac parameter measurements. Proceedings of The 9th European Symposium on Ultrasound Contrast Imaging, Jan. 22–23, 2004 Rotterdam; pp. 61-62.
• Mischi M, Jansen AHM, Korsten HHM, et al: Sparkling waves and echocardiographic quantification. Proceedings of the 18th Annual Advances in Contrast Ultrasound, Oct 30–31, 2003, Chicago, IL; p. 23-23.
• Bouakaz A, de Jong N, Cachard C: Standard properties of ultrasound contrast agents. Ultrasound Med Biol 24:469-472, 1998.[CrossRef][Web of Science][Medline] [Order article via Infotrieve]
• Mischi M, Kalker AACM, Korsten HHM: Contrast echocardiography for pulmonary blood volume quantification. IEEE Trans Ultrason Ferroelectr Freq Control 51:1137-1147, 2004.[CrossRef][Web of Science][Medline] [Order article via Infotrieve]
• Mischi M, Kalker ACCM, Korsten HHM: Videodensitometric methods for cardiac output measurements. Eurasip J Applied Signal Processing 2003:479-489, 2003.[CrossRef]
• Mischi M, Kalker ACCM, Korsten HHM: Moment method for the local density random walk model interpolation of ultrasound contrast agent dilution curves. Proceedings on the 17th International EURASIP Conference BIOSIGNAL 2004, Brno (Czech Rep.), Jun. 23–25, 2004; pp. 33-35.
• Mischi M, Jansen AHM, Korsten HHM, et al: Identification of ultrasound-contrast-agent dilution systems for ejection fraction measurements. IEEE Trans Ultrason Ferroelectr Freq Control 52:410-420, 2005.[CrossRef][Web of Science][Medline] [Order article via Infotrieve]
• Mischi M, Jansen AHM, Korsten HHM: Contrast ultrasound methods for left-ventricle ejection fraction measurements. IEEE UFFC Proc. on Annual International Conference on Ultrasonics, Rotterdam, Sep. 18–21, 2005.
• Mischi M, Kalker ACCM, Korsten HHM: Cardiac Image Segmentation for Contrast Agent Videodensitometry. IEEE Trans Biomed Engineer 52:277-286, 2005.[CrossRef]

Seminars in Cardiothoracic and Vascular Anesthesia, Vol. 10, No. 1, 57-62 (2006)
DOI: 10.1177/108925320601000110


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This Article Abstract Free Full Text (Free PDF) Free Alert me when this article is cited Alert me if a correction is posted Services Email this article to a friend Similar articles in this journal Similar articles in PubMed Alert me to new issues of the journal Add to Saved Citations Download to citation manager Request Permissions Request Reprints Add to My Marked Citations Citing Articles Citing Articles via Google Scholar Citing Articles via Scopus Google Scholar Articles by Korsten, H. H. M. Articles by Peels, K. Search for Related Content PubMed PubMed Citation Articles by Korsten, H. H. M. Articles by Peels, K. Social Bookmarking                         What's this?