BACKGROUND: Disturbances in coronary flow due to embolization of thrombus/atheroma fragments are associated with poor prognosis after percutaneous coronary intervention (PCI). Lesions in saphenous vein grafts (SVG) and acute coronary syndromes (ACS) are typically associated with these complications. Although embolic protection devices have shown to reduce the incidence of such complications, they add time and costs to the procedure, and their use is limited to SVG. The newly developed MGuardTM stent combines a microscopic net connected to the struts of a bare metal stent, characterizing this new low-profile device. OBJECTIVE: To evaluate safety and efficacy of the novel MGuardTM stent system through clinical and angiographic outcomes. METHODS: Single-center study including 19 patients with de novo lesions in SVG or with unstable lesions in native vessels as evidenced by angiography. Primary end point included 30-day incidence of major adverse cardiac events (MACE). RESULTS: ACS was the clinical presentation in 60% of cases, and in 55% of the patients the lesion was in a SVG. The MGuardTM stent was successfully delivered in all cases, reaching TIMI 3/blush 3 flow at the end of all procedures. There were no cases of angiographic complications, CK-MB elevations > 3x the reference values after PCI, or MACE at 30 day-follow-up. CONCLUSION: In this preliminary evaluation, the MGuardTM stent showed high efficacy in a group of patients with highly complex angiographic profile (without the use of adjunctive embolic protection devices). Six-month angiographic follow-up and a larger cohort of patients are necessary to corroborate these results.
Embolism; Stents; Thrombosis; Equipment safety; Feasibility studies; Saphenous vein; Coronary artery bypass
