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  • 1.
    Fors, Carina
    et al.
    Linköping University, Department of Biomedical Engineering, Biomedical Instrumentation. Linköping University, The Institute of Technology.
    Casimir Ahn, Henrik
    Linköping University, Department of Medical and Health Sciences, Thoracic Surgery. Linköping University, Faculty of Health Sciences.
    Wårdell, Karin
    Linköping University, Department of Biomedical Engineering, Biomedical Instrumentation. Linköping University, The Institute of Technology.
    Analysis of breathing-related variations in ECG-triggered laser Doppler perfusion signals measured on the beating heart during surgery2006In: Computers in cardiology, ISSN 0276-6574, Vol. 33, p. 181-184Article in journal (Refereed)
    Abstract [en]

    Laser Doppler perfusion monitoring (LDPM) is a

    method to assess microvascular perfusion. A modified,

    ECG-triggered LDPM system has been developed to

    measure myocardial perfusion with minimum influence

    from heart motion. With this method, one systolic (PLS)

    and one diastolic (PLD) perfusion value is obtained.

    The aim of this study was to analyse breathing-related

    variations in PLS and PLD measured during open-heart

    surgery. The phase delays between PLS, PLD, mean

    arterial blood pressure (MAP), heart rate and, indirectly,

    the respiration were determined.

    MAP tended to be in phase with or precede the

    variations in PLD, i.e., PLD was at a maximum at the end

    of inspiration or at the beginning of expiration. No clear

    relation between PLS and any of the other signals could

    be found.

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