Abstract:The coronary guidewire re-crossing position before the final kissing balloon post-dilation is important to reduce the incidence of incomplete stent apposition in bifurcation lesions. Angiography and intravascular ultrasonography are unreliable at detecting the site of wire re-crossing. The high resolution of optical coherence tomography (OCT) offers the advantage of precise assessment of construction in bifurcation. However, the OCT technique still has some limitations, including the requirement for additional contrast and expense. We present two cases where the ClearStent Live system technique was used to estimate the wire location, which was verified by using OCT. In conclusion, ClearStent can be used with or to replace the intracoronary imaging technique in selected cases. J Thorac Dis 2017;9(3):E197-E201 jtd.amegroups.com angioplasty, a 2.5 mm × 24 mm stent (Partner, Lepu, China) was deployed in the distal LCX coronary artery and a 3.5 mm × 24 mm stent (PROMUS, Boston Scientific, USA) was deployed from the left main artery to the proximal LCX coronary artery ( Figure 1C,D). After re-wiring from the left main artery to the LAD, we used the ClearStent technique, which could enhance the revolution of the strut to estimate the wire location, and found that the wire re-crossed the distal cell ( Figure 1E,F). After the successful final kissing balloon and proximal optimal techniques, the final angiography was performed ( Figure 1G). We used OCT to verify our hypothesis successfully after re-crossing J Thorac Dis 2017;9(3):E197-E201 jtd.amegroups.com the distal cell (Figure 2). The patient was discharged 2 days later. No complications occurred either during the hospital stay or during the follow-up (6 months).
Case 2A 55-year-old woman with a history of hypertension and dyslipidaemia was admitted to our hospital because of recurrent chest pain with minimal effort for 1 month. She was pre-treated with aspirin 100 mg and ticagrelor 180 mg per day. The diagnosis was unstable angina pectoris (CCS grade III and Braunwald grade IA). The patient's current coronary angiogram revealed severe stenosis at the middle segment of LAD, involving the ostium of diagonal artery ( Figure 3A). We have obtained written informed consent from patient before the procedure. After successful wiring and balloon angioplasty, a 3.5 mm × 30 mm stent (Resolute, Medtronic, USA) was deployed in the LAD with provisional Figure 3B). After re-wiring from the LAD to the diagonal artery, we used the ClearStent technique to estimate the wire location ( Figure 3C,D). After post dilation with a 4.0-mm balloon, we performed the final angiography ( Figure 3E). We used OCT to verify our hypothesis successfully after re-crossing the distal cell (Figure 4). The patient was discharged 2 days later, and his symptom was relieved obviously. At a 1-year follow-up, the patient was asymptomatic and free from events.
DiscussionThe European Bifurcation Club strongly recommends the use of the distal cell when re-wiring because crossing the distal cell of the ...