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. Author manuscript; available in PMC: 2016 Jan 31.
Published in final edited form as: JACC Cardiovasc Interv. 2015 Feb;8(2):268–270. doi: 10.1016/j.jcin.2014.08.013

Figure 1. Algorithm for Crossing Chronic Total Occlusions.

Figure 1

The algorithm starts with dual coronary injection (box 1) to allow assessment of several angiographic parameters (box 2) and allows selection of a primary antegrade (boxes 3 to 5) or primary retrograde (box 6) strategy. Strategy changes are made (box 7) depending on the progress of the case. LaST = limited antegrade subintimal tracking. Reproduced with permission from J Am Coll Cardiol Intv 2012;5:367–79 © 2012 by the American College of Cardiology Foundation.