Tehran University of Medical Sciences The Research in Heart Yield and Translational Medicine (RHYTHM) 3115-7270 2 4 2007 10 18 Successful Implantation of Coronary Sinus Lead after Balloon Angioplasty of a Coronary Vein Stenosis 233 234 Mohammad Hasan Namazi Cardiovascular Research Center/Shaheed Beheshti University of Medical Sciences, Tehran, Iran. Morteza Safi Cardiovascular Research Center/Shaheed Beheshti University of Medical Sciences, Tehran, Iran. Hassan Kamalzadeh Cardiovascular Research Center/Shaheed Beheshti University of Medical Sciences, Tehran, Iran. Reza Karbasi Cardiovascular Research Center/Shaheed Beheshti University of Medical Sciences, Tehran, Iran. 2015 10 03 A 55-year-old man referred for cardiac resynchronization therapy (CRT) due to severe heart failure. A severe stenosis in the coronary sinus vein after the posterior branch disallowed the insertion of the lead. Nevertheless, the stenosis was dilated and the left ventricle (LV) lead was implanted in the lateral marginal branch. https://rhythm.tums.ac.ir/index.php/jthc/article/view/71 https://rhythm.tums.ac.ir/index.php/jthc/article/download/71/69