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Blood Transfusion And 10-year Survival After Minimally Invasive Aortic Valve Replacement Versus Conventional Aortic Valve Replacement: A Propensity-matched Analysis
Sam Poon, Joseph George, Sobaran Sharma, Pankaj Kumar.
Morriston Hospital, SWANSEA, United Kingdom.

OBJECTIVE: This study sought to investigate whether minimally invasive aortic valve replacement (Mini-AVR) required fewer blood transfusion and its impact on long term survival compared to conventional aortic valve replacement (AVR)
METHODS: A retrospective cohort study was carried out in a single centre. 274 patients received Mini-AVR and 1036 had AVR. A matched logistic regression study was carried out for these patients.
RESULTS: The mean age of patients was 70 years old. 53% of patients in the Mini-AVR group received blood transfusion in comparison to 63.1% in the AVR group (p<0.05). The mean unit of blood transfused was 1.8 and 2.5 units (p=0.04) in the mini-AVR and AVR group respectively. Both groups have comparable in-hospital mortality (Mini AVR 1.38% vs. AVR 1.06%, p>0.05). After adjusting differences in peri-operative risk factors, there was no significant difference in 10 years survival (66% vs 60%, p>0.05).
CONCLUSIONS: Mini-AVR is associated with fewer blood transfusion compared to AVR. There is a trend toward lower blood transfusion and better 10-year survival but these differences were not statistically significant.


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