An 80-year-old female underwent transfemoral transcatheter aortic valve replacement, during which an outward bending of the transcatheter heart valve's stent frame occurred. Because of the difficulty in fixing the deformation by balloon angioplasty, the valve delivered with balloon cushion technique was slowly deployed with underfilling, resulting in no annulus rupture.
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Masumoto et al. (2024) studied this question.
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