[Why and how do I use the orbitalatherectomy ?]

Severe coronary artery calcification, too often underestimated, increases the complexity of percutaneous coronary interventions. Atherectomy is one of preferred approach for the preparation of calcified lesions before stent placement. Orbital atherectomy (OA) is a new method that has proven to be safe and effective in the preparation of calcium plaques (ORBIT I and ORBIT II studies). The OA is made up of a crown mounted with diamonds that abrades the endoluminal calcium plaque by centrifugal force and creates pulsatile forces on the wall that fractures the deep calcified plaques in the media. The OA Diamondback 360 ™ consists of a tableside electric powered motor handle connected to a drive shaft mounted with an eccentric crown. The OA specific 0.012" coronary guidewire made of Nitinol (ViperWire ™) has 3 qualities; the torquability, the ease of navigation and the support. Compared to rotational atherectomy, AO is associated with a lower rate of MACE at 1 year, with less revascularization of the target vessel and reduced fluoroscopy time but at the cost of an increased rate of coronary dissection and perforation. AO is a new, quite attractive, safe and effective tool to consider in the preparation of calcified coronary lesions.