What Does This Coronary Angiography Test Finding Indicate?

Hello Doctor(s): I am concerned about my mom s health now who recently had angioplasty after first attack. The coronary angiogram reported as below. 1.     LMCA normal 2.     LAD thin vessel 90% lesion after D1; distal 1.5 mm size vessel 3.     Diagonals: D1 – proximal 90% lesion 4.     LCx – proximal 50% lesion 5.     OMs: thin vessel and normal 6.     RCA – proximal 70% lesion 7.     PDA normal 8.     PLVB – proximal total occlusion The diagonal artery D1 is only 1.2 mm in diameter and has 90% lesion. Is angioplasty possible and/or recommended at all in this situation? THANKS IN ADVANCE