The quality of the angiogram was similar between groups with the exception of more left coronary sinus flush with 4 Fr catheters ( 3.57 1.1 vs. 2.98 0.9 , P < 0.001 ) and less closure device use with 4 Fr ( 25 vs. 71.4 % , P < 0.01 ) compared to 6 Fr catheters .
