 Catheter was then withdrawn and a #6 French non-bleed-back sidearm sheath was then introduced, and through this, a 6 French Judkins left coronary catheter was then advanced under hemodynamic monitoring to the left coronary ostium, engaged. 
Catheter was then withdrawn and a # 6 French non - bleed - back sidearm sheath was then introduced , and through this , a 6 French Judkins left coronary catheter was then advanced under hemodynamic monitoring to the left coronary ostium , engaged .