Objective. To conduct a comparative analysis of coronary sinus vein visualization using the standard technique – intraoperative balloon occlusion venography (BOV) – and the proposed method of multislice computed tomography of the heart with coronary sinus contrast for cardiac resynchronization therapy (CRT) device implantation. Material and methods. This article compares data on cardiac venous anatomy obtained via computed tomography venography (CTVG) and BOV in 60 patients with indications for CRT. All patients underwent CTVG prior to CRT device implantation and BOV during the implantation procedure. The coronary sinus trunk, posterior lateral, lateral, anterolateral, and anterior interventricular veins were assessed in terms of the feasibility and quality of their visualization. The course of the operation was also analyzed, and difficulties during left ventricular electrode implantation caused by the anatomical structure of the coronary sinus bed were recorded. Statistical analysis was performed using McNemar’s test and the Wilcoxon test. Results. The analysis revealed that the posterior and posterior interventricular veins were visualized in a statistically significantly larger proportion of patients with CTVG compared to BOV (p < 0,001). The other coronary sinus veins showed no difference in visualization feasibility between the two methods. The quality of visualization was statistically significantly higher with CTVG for the posterior and posterior interventricular veins (p < 0.001), the posterolateral vein (p = 0.007), and the lateral vein (p = 0.003). Conclusion. The CTVG method is not only non-inferior to the gold standard, BOV, but also surpasses it in terms of the feasibility and quality of cardiac venous bed visualization.