In vitro effects of amiodarone on coronary artery bypass grafts

Background: This study aims to investigate the effects of amiodarone on the most commonly used grafts, internal thoracic artery (ITA), saphenous vein (SV), and radial artery (RA) in organ bath. Methods: Twenty patients (16 males, 4 females; mean ages 58.4 +/- 9.9 years; range 38 to 80 years) who underwent isolated coronary artery bypass graft (CABG) surgery between May 2008 and October 2008 were included in this study. Internal thoracic artery, saphenous vein, and radial artery grafts were harvested. Specimens were taken to laboratory in +4 degrees C Krebs solution. Specimens were suspended in 10 ml organ bath containing Krebs solution. Results: Amiodarone caused relaxation in all grafts (ITA, RA, SV) between 10(-9)-10(-3,5) M concentration in a dose dependent manner (p