Extra flow in the RVTags: Cardiac sonography(Echocardiography), Medison Sonoace R7, Images, Video, Clinical report, Pediatric Posts 09:11 17-01-2018 Extra flow in the RV#1 Child 1 month on a routine screening. In the middle third of the IVS additional flow is visualized with the direction from the LV to RV, 1 flow up to 5 mm in size or 2 flows up to 2.5 mm (interventricular septum defect - IVSD? Coronary fistula - CF? Their combination?). external link :: attachments(2) :::: file 1 :::: file 2 :: HTML5 video plugin not supported!