Session P32.3

Modeling of Intra-Aortic Balloon Pumping for Studying Thoracic Aorta Pressure

MO Abdolrazaghi*, MA Navid Bakhsh, KA Hassani

Iran University of Science and Technology
Tehran, Iran

Intra-aortic balloon pumping is a mechanical cardiac assistant device that benefits patients with actual or potential life threatening circulatory problem. Understanding the principles and efficient inflation/deflation timing of intra-aortic balloon pumping is the most crucial issue for managing dynamic benefits and salvaging ischemic myocardium. Mathematical modeling is the great tool for attaining the goal in the safest and most proper way.
First, the whole cardiovascular system model is developed in details with 43 compartments and 137 elements. Then, left ventricle myocardial infarction has been modeled with 20% defect in cardiac contractility. Furthermore, the relevant treatment done by Intra-aortic balloon pumping has been modeled. The novelty of this study is in extending the cardiovascular system in accordance to the arterial geometry. Although the lumped model is primarily presented for rigid vessels, it has been improved for arterial elastic vessels through incorporating the capacitance as a compliance of the vessel.
The results of modeling are in good agreement with the clinical observation. The pressure and volume of every part of circulatory system are verified by the physiological textbook.
Also, the intra-aortic balloon pumping modeling has been verified with relevant physiological achievements. During balloon counter pulsation, a double-hump, double-dip pattern is inscribed on arterial waveform. The pattern is exactly achieved by the modeling. The model is convenient to manage every occasion of the balloon timing or any other variations in insertion of balloon and thoracic artery diameter.

(Abstract Control Number: 372)