Multiscale and monolithic arbitrary Lagrangian–Eulerian finite element method for a hemodynamic fluid-structure interaction problem involving aneurysms

•Two types of multiscale and monolithic ALE-FEM are developed for the hemodynamic FSI problem that involves the aneurysm progression.•The heterogeneous multiscale method (HMM) and the seamless multiscale method (SMM) are integrated into the developed ALE-FEM.•The developed multiscale ALE-FEM can predict the long-term aneurysm risk within a short time cardiovascular FSI and biological simulations.•The developed multiscale ALE-FEM is numerically validated by a 2D example in terms of its approximation accuracy.•The HMM/ALE-FEM is applied to AAA patient's CT scan imaging data and shows that the prediction matches well with patients' historical data.