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Fig. 3 | BMC Cardiovascular Disorders

Fig. 3

From: Role of IVUS in the rectification of angiographically judged ramus intermedius and its clinical significance

Fig. 3

Examples of IVUS-RI, IVUS-h-D and IVUS-h-OM in CAG and their diagrams. Top panel: A left anterior oblique caudal view (“spider” view) revealed a CAG-RI in the distal LM furcation in each group. Second panel: Different outcomes in groups treated with different revascularization strategies; A2: no jailed wire was used in IVUS-RI, and RI occlusion occurred; B2: a jailed wire was used in IVUS-h-D, and no slow flow or lumen reduction occurred; C2: no jailed wire was used in IVUS-h-OM, and no slow flow or lumen reduction occurred. Bottom panel: Diagrams of IVUS-RI, IVUS-h-D and IVUS-h-OM; A3: RI results from the trifurcation point; it can be seen at the entrance of the LCX, and the three lumens have blood flow; B3: IVUS-h-D was fully incorporated into the LAD before the LCX entered; C3: IVUS-h-OM was fully incorporated into the LCX before the LCX entered, but it cannot be seen from the LMCA-LAD IVUS view. RI, ramus intermedius; h-D, high-origin diagonal branch; h-OM, high-origin obtuse marginal artery; LAD, left anterior descending branch; LCX, left circumflex artery; CAG, coronary artery angiography; IVUS, intravascular ultrasonography; LMCA, left main coronary artery

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