CABG is a difficult and very critical surgery , it is done to revascularize the myocardium in cases of cardiac ischemia . If the myocardium is still viable in selected patients then it is the treatment of choice with outstanding results . Indications of this operation are more than 50% diameter stenosis of the left main coronary artery, more than 70% diameter stenosis in proximal left anterior descending artery (LAD), more than 70% diameter stenosis in three major coronary vessels, ventricular septal defect related to myocardial infarction , papillary muscle rupture , free wall rupture , ventricular pseudoaneurysm , life-threatening ventricular arrhythmias, and cardiogenic shock. Multiple methods have evolved to achieve the best outcome .The revascularization process depend on two main graft either artery or venous , each has its advantage and disadvantage according to their elasticity , ability to deliver an adequate flow and sustain high blood pressure. Our focus is on the different configuration used for the revascularization by using the artery grafts only due to the superiority of the artery graft in comparison to the venous according to the outcomes and not the feasibility of the technique .It is recommended to begin with internal thoracic artery then saphenous vein if both failed then multiple conduits will be used . Bilateral internal thoracic artery grafting can be an optimal option for coronary artery bypass grafting ,but it's the long-term outcome is still under study.There is no accepted configuration of the anastomosis to be used in the multiple conduits .
Study Type
OBSERVATIONAL
Enrollment
50
Strategies of Complete Arterial Revascularization THE COMPOSITE TECHNIQUE When the distal RIMA bifurcation cannot loosely reach the LAD, we use the RIMA as a free graft, and a T-shaped , or if more suitable, a Y-shaped anastomosis at the level of the main pulmonary artery, is prepared before connection to cardiopulmonary bypass (CPB) THE CROSS TECHNIQUE The cross arrangement is based on the assumption that patency rates of the right internal mammary artery (RIMA) on the left anterior descending coronary artery (LAD) is similar to that of the left internal mammary artery (LIMA) on the LAD. To improve late survival, every effort should be made to use both IMA grafts for the left system THE IN SITU SEQUENCE When a graft to the posterior wall of the heart is not necessary (the circumflex region), the LIMA is grafted to the left anterior descending and the RIMA to the right coronary artery or its posterior de
Effective revascularization.
Time frame: Changes Baseline perfustion after 3 months by MRI
Number of patient complicated by heart failure
Time frame: changes in the base line heart rate after 24 hours post-operative
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