Transfemoral vascular access is the most common approach for both diagnostic as well as therapeutic coronary interventions; however, higher rate of vascular complications and bleeding have been reported especially in women and older patients than with radial access (1). Transradial approach (TRA) is now being increasingly used and is the preferred vascular access for cardiac interventions (2). TRA offers advantages such as minimal invasion, ease of performance of diagnostic and therapeutic coronary interventions, minimum patient discomfort, early ambulation, shorter hospital stay, and lower hospital costs (3-7). In addition, there are lower local site complications, morbidity, and mortality in patients who specifically present with acute coronary syndromes (6, 7). Radial artery occlusion (RAO) is one of the most frequent complications of TRA that affects a sizeable proportion of patients (8, 9). Post transradial coronary intervention (TCI), early RAO may occur because of radial artery spasm and thrombosis, which may be precipitated by combined effects of catheter-induced endothelial injury and decrease in blood flow after sheath and catheter insertion (8). The incidence of RAO varies in different studies ranging from 1% to 42%, and has been determined by the timing of evaluation and the method used for the diagnosis of RAO. Various patient-specific and procedure-related factors influence the occurrence and consequences of . However, the predictors of RAO after TCI are not clearly defined. In this study, we determine the incidence and patient-specific and procedure-related predictors of RAO among patients undergoing TCI.