Imaging the cardiac blood flow during CPR with EBCT in an animal model

Wolfgang A. Recheis; Antonius H. Schuster; Leo Pallwein-Prettner; Axel Kleinsasser; Alexander Loeckinger; Christoph Hoermann; Dieter zur Nedden

doi:10.1117/12.463571

24 April 2002 Imaging the cardiac blood flow during CPR with EBCT in an animal model

Wolfgang A. Recheis, Antonius H. Schuster, Leo Pallwein-Prettner, Axel Kleinsasser, Alexander Loeckinger, Christoph Hoermann, Dieter zur Nedden

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Proceedings Volume 4683, Medical Imaging 2002: Physiology and Function from Multidimensional Images; (2002) https://doi.org/10.1117/12.463571
Event: Medical Imaging 2002, 2002, San Diego, California, United States

Abstract

There are open questions concerning the hemodynamics during cardiopulmonary resuscitation (CPR). The purpose was to evaluate a model of the blood flow during CPR in specified anatomic regions. After cardiac arrest, one intubated swine under full intensive care supervision was scanned during CPR using an automated resuscitation device. CT scans were performed with an EBCT in the 50ms modus at eight levels, therefore covering most of the heart and pulmonary vessels. 50ml contrast agent was administered with 10ml/sec and a delay of five seconds to visualize the contrast agent passage through the heart and pulmonary circulation. The gray-value changes in previously specified ROIs were directly correlated with the resuscitation device position in respect to the thorax. The effects of CPR on the blood flow could be visualized dynamically by quantifying the contrast enhancement. The increase of gray values could be estimated with different delays, depending on the anatomical situation. The inflow and outflow dependent on thumper dynamics could be estimated. At the onset of contrast medium inflow, turbulence could be visualized in the right ventricle, which are caused by the inhomogeneous contrast medium distribution. Triggered EBCT during CPR offers the opportunity to study regional blood flow depending on chest compression.

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Wolfgang A. Recheis, Antonius H. Schuster, Leo Pallwein-Prettner, Axel Kleinsasser, Alexander Loeckinger, Christoph Hoermann, and Dieter zur Nedden "Imaging the cardiac blood flow during CPR with EBCT in an animal model", Proc. SPIE 4683, Medical Imaging 2002: Physiology and Function from Multidimensional Images, (24 April 2002); https://doi.org/10.1117/12.463571

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KEYWORDS

Blood circulation

Computed tomography

Heart

Visualization

Blood

Chest

Factor analysis

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