ABC | Volume 111, Nº5, November 2018

Original Article Albertini et al The role of preoperative venography in reoperations Arq Bras Cardiol. 2018; 111(5):686-696 Figure 2 – Distribution of the four types of venous lesions and their associations with the presence of collateral circulation. Collateral Circulation Absent Present 60 50 40 30 20 10 0 Venous lesions (%) Lesion < 50% Moderate Severe Occlusion 49 4 13 10 11 2 11 Table 2 – Characteristics of the cardiac device being used at the time of inclusion in the study according to the side of the implant Characteristics of the previous CIED Right side (n = 48) Left side (n = 52) p Type of CIED, n (%) Conventional pacemaker 45 31 Conventional ICD 1 18 < 0.001 (1) CRT 1 1 CRT-D 1 2 Total number of transvenous leads, n (%) One 10 12 Two 33 37 0.306 (1) Three 4 3 Four 1 - Dwelling time of transvenous leads, years Means ± SD 14.3 ± 6.1 8.0 ± 7.9 0.075 (2) Variation 5 - 37 1 - 32 CIED: cardiac implantable electronic device; ICD: implantable cardioverter-defibrillator; CRT: cardiac resynchronization therapy; CRT-D: cardiac resynchronization therapy associated with implantable cardioverter-defibrillator. (1) Chi-square test; (2) Student t-test Usefulness of Venography to Define Surgical Planning Agreement between the surgical strategy based on the analysis of digital subtraction venography and the surgical procedure actually performed occurred in 99 out of the 100 patients operated. Lack of agreement, which occurred with a single patient, arose from a mistake in classifying the degree of a lesion in the right subclavian vein, which was deemed moderate in the preoperative period, but during the operation was found to be a sub-occlusive lesion (Table 5). 690