Validity of estimated aortic pulse wave velocity measured during the 6-min walk test to predict anaerobic fitness before major non-cardiac surgery

This study aimed to assess the efficacy of estimated preoperative aortic pulse wave velocity (AoPWV) to discriminate between low and high 6 min walk test (6MWT) distance in patients awaiting major non-cardiac surgery. Prospective observational study in 133 patients undergoing non cardiac surgery. AoPWV and the distance walked during a 6MWT were assessed. Receiver operating characteristic (ROC) curve analysis was used to determine two different AoPWV cut-points for predicting a distance of 427 m in the 6MWT. We also calculated lower and upper AoPWV cut-points (probability ≥ 0.75) for predicting a distance of < 427 m, ≥427 m, and also 563 m in the 6MWT. The ROC curve analysis for the < 427 m distance revealed an area under the curve (AUC) of 0.68 (95% confidence interval 0.56–0.79) and an AUC of 0.72 (95% confidence interval 0.61–0.83) for >563 m. Patients with AoPWV > 10.97 m/s should be considered high risk, while those with 563 m. Los pacientes con VOP aórtica > 10,97 m/s deberán considerarse de alto riesgo, mientras que aquellos con < 9,42 m/s deberán considerarse de bajo riesgo. La VOP aórtica es una herramienta simple, no invasiva y útil para identificar y estratificar a los pacientes en espera de cirugí