Re-sternotomy for aortic valve replacement with patent coronary artery
bypass grafts
Abstract
Objective - The aim was to evaluate early and long-term outcomes of
re-sternotomy for aortic valve replacement with previous patent coronary
artery grafts. Methods - Data for re-sternotomy for aortic valve
replacements (group 1 isolated AVR, group 2 AVR with concomitant
procedure) were collected (2000-19). Logistic regression analysis was
performed to identify predictors of in-hospital mortality and
postoperative composite outcome (in-hospital death, TIA/stroke, renal
failure requiring new hemofiltration, deep sternal wound infection,
re-exploration for bleeding/tamponade and length of stay
>30 days). Survival curves were compared using log rank
test. Cox proportion hazards model was used for predictors of long term
survival. Results – Total 178 patients were included (groups 1 - 90
patients, group 2 - 88 patients). Mean age was 75±4 years and mean log
EuroSCORE was 17±12% (15 ± 8% - group 1 vs 19 ± 14% - group 2,
p=0.06). Mean follow up was 6.3±4.4 years. Cardiovascular injury
occurred in 12%. LIMA was most commonly injured. In-hospital mortality
was 7.8% (5% - group 1 versus 10.2% - group 2, p=0.247). NYHA class
III-IV, perioperative IABP and cardiovascular injury were independent
predictors of in-hospital mortality (HR; 13.33, 95% CI; 2.04, 83.33,
p=0.007). Survival was significantly worse with cardio-vascular injury
at re-sternotomy up to 5 years (46% versus 67%, p=0.025) and
postoperative complications (p=0.023). Survival was significantly lower
than age matched first time AVR and UK population. Conclusions – Long
term survival is significantly impaired by cardiovascular injury and
perioperative complications of re-sternotomy.