Fig. 1

a and b Preoperative contrast-enhanced computed tomography shows deformity of the right atrium and narrowing of the tricuspid valve tract compressed by ascending aortic dilation and elongation and pectus excavatum (green arrowhead). d and e Postoperative contrast-enhanced computed tomography shows that the right atrium and tricuspid valve tract are not compressed by the ascending aorta (yellow arrowhead). c and f Before the replacement of the ascending aorta, the right atrium was compressed and hidden by a dilated and elongated ascending aorta (c). After the replacement of the ascending aorta, the RA is no longer compressed (f). Ao, Aorta; RA, right atrium