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A 76-year-old male was admitted to undergo a transfemoral aortic valve implantation. Left main coronary artery (LMCA) was low (8.5 mm) with a long (12.5 mm) and thick left leaflet in the aortic valve (figure 1A), and small aortic sinuses, therefore the LMCA was protected with a guidewire. After implanting an Edwards-S3 valve (N29; -1cc) and despite patent LMCA with normal coronary flow the coronary angiography still showed inconclusive images (arrow, figure 1B and video 1 of the supplementary data).