Flow dynamics in an aneurysm: Effect of prolonged exercise

Present work involves the study of non-invasive treatment of unruptured Abdominal Aortic Aneurysm subjecting the patient to certain physiological level of heart. This technique was initially studied by Varshney et al. [1] Flow topology for 3-D axisymmetric and asymmetric aneurysm is studied under resting (Re=200), mild exercise (Re = 750) & moderate exercise (Re=1200) conditions. Pulsatile flow is given at inlet. Hemodynamic indicators are quantified in terms of time-averaged wall shear stress, oscillatory shear index. The trajectories of vortex-core movement (using Q-criterion) are correlated to pressure peaks attained at the wall. For symmetric aneurysm, it was seen that the resting condition manifests the aneurysmal wall to recirculating fluid for most of the cycle time. Moderate and high exercise exposes the aneurysmal wall and the distal end to high pressure, which otherwise has low intensity under mild activity Thus, mild exercise for a prolonged duration is effective in non-invasive symmetrical aneurysmal treatment. Similar study will be done for an asymmetric aneurysm.

Reference: [1] Varshney, M., Farooqi, M. H., & Usmani, A. Y. (2019). Quantifying hemodynamics within an aneurysm exposed to prolonged exercise levels. Computer Methods and Programs in Biomedicine, 105124.