comparison of unstable hemodynamic patients undergoing coronary artery bypass graft surgery with on- or off-pump methods

introduction: coronary artery disease (cad) is the most common type of heart disease, with a mortality rate of 385,000 person per year in the united states. there are two main methods for cad treatments: angioplasty and bypass surgery. coronary artery bypass grafting (cabg) is one of the greatest surgical operations of the 20th century and it is presented as most effective and long-term therapies in the treatment of ischemic heart disease. there are two different methods of cabg; on-pump and off-pump. while off-pump cabg is a newer method, it decreases stroke and maintains higher mental function. we conducted the assessment of patients’ outcome that underwent on- or off-pump cagb with hemodynamic instability. materials and methods: in this cross-sectional study, we evaluated cardiogenic shock patients with cabg who referred to ghaem hospital for emergency operation from january 2012 to november 2013. we collected medical records archive from this hospital and all patients' information including demographic data, clinical variables, and past medical history separately. we performed on and off-pump cabg surgery for the patients. in on pump group, we performed beating on pump method, without aortic cross clamping. results: twenty-eight patients who underwent cabg in two forms: on-pump and off-pump were studied. the minimal age of the patients was 34 and the maximal was 78. patients’ weight had a range between 60 to 95 kg. the minimum used graft were two and the maximum were five. ejection fraction was diversified between 15% (min) and 50% (max). operation time ranged 1.50 to 5.50 hours. the icu stay time was between 2(min) to 11 (max) days. finally death was occurred in 5(17.9%) of patients. conclusion: our findings showed that cabg with beating heart could increase the survival of hemodynamic unstable patients in comparison with off-pump cabg