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Influences of chronic obstructive pulmonary disease on outcomes of total arch replacement
Shunsuke Miyahara1, Hidekazu Nakai1, Naoto Izawa1
1Department of Surgery, Division of Cardiovascular Surgery, Kobe University Graduate School of Medicine, Kobe, Japan.
Background:
Although an association between chronic obstructive pulmonary disease (COPD) and adverse surgical outcomes has been proposed, the impact of COPD severity on postoperative outcomes remains unclear. Our objective was to analyze the prognostic implication of COPD severity on outcomes after total aortic arch replacement.
Methods:
Between October 1999 and December 2012, 269 patients undergoing total arch replacement through median sternotomy, who were elective cases with preoperative spirometry records, were retrospectively reviewed. Patients were divided into four groups: control group, with ratio of forced expiratory volume of air in 1 second (FEV1) to forced vital capacity (FVC) of 70% or greater; mild airflow obstruction, with FEV1/FVC ratio less than 70% and FEV1 80% or greater of predicted; moderate airflow obstruction, FEV1/FVC ratio less than 70% and FEV1 50% to 79% of predicted; severe airflow obstruction, FEV1/FVC ratio less than 70% and FEV1 less than 50% of predicted. Symptoms of functional dyspnea and disability were also assessed. Multivariate logistic and Cox regression methods were used to determine if there was an independent association between COPD and short-term and long-term outcomes, respectively.
Results:
The in-hospital mortality rate was 2.2% (6 of 269). A consistent trend of increasing frequency of postoperative respiratory complications with advanced airflow obstruction was noted. In multivariate analysis, in-hospital mortality (p = 0.022), incidence of respiratory complications (p = 0.021) and overall mortality (p = 0.025) was significantly associated with the symptoms of COPD, respectively.
Conclusions:
The severity of COPD as defined by spirometry and symptoms of functional dyspnea may be an important prognostic marker of patients undergoing total arch replacement.
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