Orbital Atherectomy in Calcified Lesion

A 71-year-old female with hypertension, hyperlipidemia, and a history of smoking had angina pectoris and was referred to our hospital. Stress MPI showed mild inferoapical ischemia and coronary angiography revealed heavily calcified RCA lesion (Figure 1).

OCT assessment of the lesion revealed more than three quadrant circumferential calcification along the entire lesion as shown in Figure 2 (A1, A2, A3, asterisks). Orbital atherectomy (OA) was performed with 1.25 mm burr at 120,000 rpm. Calcified plaque modifications after OA are shown in Figure 2 (B1, B2, B3, double arrow lines). After successful calcium debulking, we performed pre-dilation with non-compliant balloon followed by deployment of a 3.5×38 mm DES. Final post-stent OCT showed good stent apposition and expansion with minimal stent area of 6.54mm² (Figure 2 C1, C2, C3).