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Aortic annulus diameter. The mean distances between the basal attachment of the aortic valve cusps and each contralateral intercommissural region for the right-, left- and non-coronary cusp. Significant differences were found comparing the right coronary cusp (RCC) in the systolic and diastolic phases (p < 0.001) and the RCC to the left (LCC) and non-coronary cusp (NCC) (p < 0.001)
