Thread-like structure in RATags: Cardiac sonography(Echocardiography), Esaote MyLab 70, Images, Video, Clinical report, Pediatric Posts 22:40 10-01-2016 Thread-like structure in RA#1 Teenager 17 years old with an arrhythmia at ECG and complaints of sleepiness after physical exercise is aimed at echocardiography. At echocardiography in RA there is a floating thread-like structure (Eustachian valve? Chiari network?).:: attachments(2) :::: file 1 :::: file 2 :: HTML5 video plugin not supported!