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The aim of this study was to investigate the risk of impaired coronary access and coronary obstruction after redo TAVI. Post-procedure multidetector computed tomography (MDCT) scans of 221 TAVI recipients were analysed. Increased risk of impaired coronary access was defined as a coronary ostium below the TAVI commissures with a valve-to-aorta distance 2 mm at this level. Increased risk was found in 123 (55.6%) cases the left main was involved in 109 (49.3%), the right coronary in 79 (35.7%), and both were involved in 65 (29.4%) patie