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• Figure - (Microsoft PowerPoint file) (2.9 MB). Two patients (A, 47 years and B, 68 years) with collaterals from right coronary artery to occluded left anterior descending artery. Radiolabeled progenitor cells were infused into the RCA. Large arrow indicates infusion site. Small arrows indicate LAD filled via collaterals. In both patients gamma camera imaging suggests, that accumulation of radiolabeled cells is restricted to the territory of the right coronary artery. ¹¹¹Indium myocardial uptake at 1 hour was 3% (A) and 9% (B).