Figure 4From: Blood stasis may cause thrombosis in the left superior pulmonary vein stump after left upper lobectomy A comparison of velocity of PV stump between SEC positive group and negative group in the patients who underwent LUL. There was no significant difference of flow in the LSPV stump between SEC positive group and SEC negative group. Of the three patients with SEC, two patients developed thrombosis in the LSPV stump (black circle).Back to article page