Transesophageal echocardiography: modified midesophageal four‐chamber view of the mobile, tubular structure in the right atrium. In the modified midesophageal four‐chamber view, an echogenic, mobile, tubular structure in the right atrium was visible. No involvement of the tricuspid valve was apparent. An additional movie file is included, underlining both the atypical, tubular structure and the unchanged tricuspid valve (see Video S1)