Visualization of the wall shear stress (WSS) of 2 representative aneurysms pairs (case 1, left; case 2, right; upper, at the systolic peak; lower, at the diastolic end). Double arrows show the ruptured aneurysms while single arrows show the unruptured aneurysms. Case 1 has aneurysms on ICA C7 (duty site) and MCA. Case 2 has aneurysms on ICA C7 and ACoA (duty site). The ruptured aneurysms have lower WSS on the dome and more low WSS area.