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Fig. 4 | BMC Cardiovascular Disorders

Fig. 4

From: Evaluation of the safety and efficacy of a novel Anatomical classification and dUal anchoRing theory to Optimize the tavR strategy for pure severe Aortic regurgitation (AURORA): a prospective cohort study

Fig. 4

Schematic Diagram of TAVR-Directed AR Morphology Classification. Type 1: the LVOT, the annulus and supra-annular extending to ascending aorta can be anchored. Type 2: the LVOT cannot be anchored, but the annulus and ascending aorta can be anchored. Type 3: the annulus and LVOT can be anchored, but the ascending aorta cannot be anchored. Type 4: the LVOT, the annulus and supra-annular extending to ascending aorta cannot be anchored. THV anchoring was considered adequate if a perimeter oversizing index of > 10% was measured on LVOT or ascending aorta. Perimeter oversizing index of > 20% on single annulus plane or of > 10% on every annulus area planes (0, 2, 4, 6, 8 mm above the basal annular plane) is considered as anchoring adequate on annulus. Perimeter oversizing index was defined as [(device nominal perimeter)/(original perimeter measured by computed tomography)−1] * 100. AR Patients with type 1–3 can be candidates for TAVR, while type 4 is not suitable for TAVR treatment. TAVR transcatheter aortic valve replacement, AR aortic regurgitation

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