Ebstein's anomaly is a congenital heart defect that occurs when the tricuspid valve, which separates the right atrium from the right ventricle of the heart, doesn't function properly. This can cause blood to flow backward into the atrium, leading to a range of symptoms such as shortness of breath and chest pain. While there are not many synonyms for this specific term, some may refer to it as tricuspid valve dysplasia or tricuspid incompetence. Additionally, it is important to note that while these terms may be used interchangeably, they do not necessarily mean the same thing and only a qualified medical practitioner should make a diagnosis and prescribe treatment.