GALWAY, Ireland--(BUSINESS WIRE)--Cappella, Inc. (Cappella), a medical device company developing dynamic solutions for the treatment of coronary bifurcation disease, announced the start of Sideguard 3, an IVUS/OCT evaluation of the Sideguard® Coronary Sidebranch Stent & Delivery System. This is a European multicenter study to evaluate the vascular response to Sideguard in de novo bifurcation lesions of native coronary arteries. The primary objective of the study is to determine the change in stent area (mm2) and corresponding change in vessel area (mm2) at the carina of the sidebranch during the 6-month follow-up period.