RESULTS OF FLOWMETRIC ASSESSMENT OF THE FUNCTION OF AUTOARTERIAL TRANSPLANTS DURING BYPASS SURGERY OF THE LEFT CORONARY ARTERY IN PATIENTS WITH HIGH SURGICAL RISK
Abstract
AIM. Evaluation of the effectiveness of intraoperative ultrasound flowmetry and identification of differencesin blood flow characteristics by autoarterial shunts in patients with high surgical risk (EvroScore>6) whounderwent surgery in IC conditions and on a working heart.Material and methods. The analysis included 96 patients with high surgical risk who underwent CABG both inthe of on pump and on a working heart conditions. The average age of patients in groups 1 and 2 was 61.5±2.9and 62.4±3.0 years, respectively (p=0.5). All patients of both groups underwent intraoperative ultrasoundflowmetry.Results. The indicators of intraoperative flowmetry confirm the good functioning of autoarterial transplants:the average volume blood flow rate is more than 20 ml/min, the pulsation index is not higher than 5 units andthe diastolic filling is higher than 50%. Previously used methods do not allow us to estimate the speed of bloodflow, to give a quantitative, devoid of subjectivity, assessment of blood flow. Flowmetry is the most commonlyused method for assessing the quality of shunts and can detect 2-4% of shunts that require revision.