Fig. 2From: Minimally invasive surgical repair for unroofed coronary sinus syndrome directed by three-dimensional transesophageal echocardiographyPreoperative three-dimensional transesophageal echocardiography. Preoperative three-dimensional transesophageal echocardiography showed there was an unroofed portion (20 × 10 mm) at the atrial side between segments P2 and P3 of the posterior mitral leaflet. P2 P2 segment of posterior mitral leaflet, P3 P3 segment of posterior mitral leaflet, A3 A3 segment of anterior mitral leaflet, URP unroofed portionBack to article page