Inclusion Criteria:  SWEDEGRAFT inclusion criteria:  First-time non-emergent CABG patients Need for at least one vein graft Able to provide informed consent and accepted for isolated primary CABG.  Additional inclusion criteria for the Right-Heart-Substudy:  • Ability to meet for follow-up visit  Exclusion Criteria:  SWEDEGRAFT exclusion criteria:  No greater saphenous vein grafts available (previous vein stripping or poor vein quality) Age > 80 years at the time of inclusion Allergy to contrast dye Renal failure with eGFR <15 ml/min at primary inclusion Coagulation disorders Excessive risk of wound infection Participation in other interventional trial on grafts Any condition that seriously increases the risk of non-compliance or loss of follow-up Pregnant women or women of child bearing potential without negative pregnancy test  Additional inclusion criteria for the Right-Heart-Substudy:  • Inability to cooperate to transthoracic echocardiography