מוחמד מחאג'נה

תלמיד המחלקה לתואר שני ירצה בנושא:

Parametric Electrical Impedance Tomography for Estimating Cardiac Stroke Volume in Patients with Implanted Cardiac Pacemaker: a 4D Simulation Study

Abstract

The present study examines the ability to estimate cardiac stroke volume in patients with implanted cardiac pacemaker using Parametric Electrical Impedance Tomography (pEIT) in a 4D (3D space and time) computerized model of the thorax.

Introduction: Cardiac Stroke Volume (CSV) is a direct indicator of the cardiac pumping efficiency. The commonly used methods for measuring CSV require the invasive procedure of right heart catheterization or use expensive imaging techniques (i.e. MRI). Hence, experience with these techniques for diagnosis and monitoring has been limited to hospitalized patients.

Methods: In the present study pEIT scheme was applied in a computerized 4D model of the human thorax with implanted cardiac device to determine the Left Ventricular (LV) volume at different cardiac cycle phases. The LV was simulated as a tri-axial semi-ellipsoid with its axes’ lengths as the reconstruction parameters while all other geometries and conductivity values remained constant. An optimization was done in order to ensure that the semi-ellipsoid is the appropriate model for the LV at each cardiac cycle phase.

Results: LV volumes calculated by the pEIT algorithm are consistent with the true volumes. A high correlation ( QUOTE ) between the true and reconstructed volumes was found. The SV calculation error was QUOTE .

Conclusion: The results suggest that the left ventricular volume can be estimated using the pEIT method in a 4D computerized model, and that the method has the potential to be used for monitoring patients with implanted cardiac pacemaker.

העבודה נעשתה בהנחיית פרופ' שמעון עבוד, המחלקה להנדסה ביו-רפואית, אוניברסיטת תל-אביב

ההרצאה תתקיים ביום ראשון 17.3.2013, בשעה 14:45,

בחדר 315, הבניין הרב תחומי, אוניברסיטת תל אביב