Optimization of Tryton dedicated coronary bifurcation system with coregistration of optical coherence tomography and fractional flow reserve.

From the *Cardiovascular Center, OLV Clinic, Aalst, Belgium; and the yDivision of Image Processing, Department of Radiology, Leiden University Medical Center, Leiden, the Netherlands. Dr. Tu is employed by Medis Medical Imaging Systems BV and has a research appointment at the Leiden University Medical Center (LUMC). Dr. Reiber is the the Tryton-stented SB through the main branch stent struts (Fig. 1). Motorized fractional flow reserve (FFR) pullback (at 1 mm/s) during hyperemia was used to allocate intracoronary pressure gradient variations, allow coregistration with anatomical, optical coherence tomography (OCT)-derived imaging, and verify optimal morphological and