IRCT20240121060750N1 IRCT 2024-03-03 Shiraz University of Medical Sciences Comparison of two methods of coronary artery bypass surgery. Comparison of single versus sequential aortic side biting clamp for restoration of venoaortic anastomosis in coronary artery bypass surgery (CABG) patients 2014-06-22 anticipated 60 Complete https://irct.ir/trial/75216 interventional Randomization: Not randomized, Blinding: Not blinded, Placebo: Not used, Assignment: Parallel, Purpose: Treatment. 1-2 Coronary Artery Bypass Grafting. Intervention 1: Control group: In order to perform coronary artery bypass surgery, two surgeons who were similar in terms of surgery time and technique were selected. All surgeries were performed by open heart surgery, under cardiopulmonary pump and cardiac arrest, by injecting cold cardioplegic fluid in the ascending aorta. For the proximal anastomoses of the saphenous vein to the ascending aorta, simple partial clamp technique was used in the control group. In the simple partial clamp method, a large lateral vascular clamp is placed on the ascending aorta, and holes are created in the aorta wall with the number of vein clamps to the aorta by a punch device. All the proximal anastomoses of the vein to the aorta are done by placing this same clamp, and after the end of the last anastomosis, the vascular clamp is opened. While performing all the proximal anastomoses, the previously grafted areas are not supplied with blood. Intervention 2: Intervention group: In the Sequential partial aortic clamp method, a relatively small or medium vascular clamp is used, which closes a small amount of the aorta wall in each stage. At each stage, only one hole in the aorta wall and only one anastomosis between the vein and the aorta were performed. After the end of each anastomosis, the clamp is opened and placed in another part of the aorta, and the next anastomosis is performed in the same way. Therefore, in this method, from the second anastomoses onwards, the previously grafted parts of the myocardium are supplied with blood. No - There is not a plan to make this available Justification or reason for not sharing IPD is It is against our policy.