Objective: The aim of this study is to evaluate the efficacy and safety of two doses of heparin, a low dose (2500 IU) and a standard dose (5000 IU) in patients who underwent transradial coronary angiography (TRCAG).
Methods: A total of 459 consecutive patients were included in the present study, 217 in the 2500-IU heparin group and 242 in the 5000-IU heparin group. Radial artery patency was evaluated one month after the TRCAG with Doppler ultrasonography.
Results: The RAO was observed in 15 (3.3%) patients. The RAO was significantly higher in 2500 IU heparin group than 5000 IU heparin group (5.5% vs 1.2% p=0.010, respectively). Female gender (Odds ratio (OR)=66.135, p=0.002, 95% confidence interval (CI)=4.584-954.131), sheath removal time (OR=1.496, p<0.001, 95% CI=1.254-1.784) and administration of 2500 IU heparin (OR=9.758, p=0.034, 95% CI=1.195-79.695) were the independent predictors of RAO in multivariate regression analysis. While the presence of hypertension was independently associated with radial artery patency in multivariate regression analysis (OR=0.022, p=0.005, 95% CI=0.002-0.307).
Conclusion: The patients in the standard dose heparin group had lower RAO rates compared to low dose group in this study. This suggests that using the current technique, standard dose of heparin is still required for transradial diagnostic angiography.
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