Abstract
IntroductionThe aim of this study was to identify the determinants of distance walked in six-minute walk test (6MWD) in patients undergoing cardiac surgery at hospital discharge.MethodsThe assessment was performed preoperatively and at discharge. Data from patient records were collected and measurement of the Functional Independence Measure (FIM) and the Nottingham Health Profile (NHP) were performed. The six-minute walk test (6MWT) was performed at discharge. Patients undergoing elective cardiac surgery, coronary artery bypass grafting or valve replacement were eligible. Patients older than 75 years who presented arrhythmia during the protocol, with psychiatric disorders, muscular or neurological disorders were excluded from the study.ResultsSixty patients (44.26% male, mean age 51.53 ± 13 years) were assessed. In multivariate analysis the following variables were selected: type of surgery (P = 0.001), duration of cardiopulmonary bypass (CPB) (P = 0.001), Functional Independence Measure - FIM (0.004) and body mass index - BMI (0.007) with r = 0.91 and r2 = 0.83 with P < 0.001. The equation derived from multivariate analysis: 6MWD = Surgery (89.42) + CPB (1.60) + MIF (2.79 ) - BMI (7.53) - 127.90.ConclusionIn this study, the determinants of 6MWD in patients undergoing cardiac surgery were: the type of surgery, CPB time, functional capacity and body mass index.
Highlights
The aim of this study was to identify the determinants of distance walked in six-minute walk test (6MWD) in patients undergoing cardiac surgery at hospital discharge
Ninety-four patients undergoing cardiac surgery were selected, 34 were excluded due to discharge before the Six-minute walk test (6MWT), Mechanical ventilation (MV) time greater than 24 hours, need for reoperation, death and denial (Figure 1)
Univariate analysis selected the following variables considered in the multivariate analysis: age (P = 0.001), type of surgery (P = 0.037), Intensive care unit (ICU) days (P = 0.037), cardiopulmonary bypass (CPB) time (P = 0.13), total Functional Independence Measure (FIM) at discharge (P = 0.074), Body mass index (BMI) (P = 0.20) and presence of diabetes (P = 0.20)
Summary
The aim of this study was to identify the determinants of distance walked in six-minute walk test (6MWD) in patients undergoing cardiac surgery at hospital discharge. Cardiac surgery is a well-established procedure worldwide due to its safety and effectiveness in treating cardiac patients. Recovery of functional capacity of patients in the postoperative period of cardiac surgery is one of the important aspects and discussed in literature [2]. A simple and efficient method to directly assess the functional capacity of the patient in the postoperative period of cardiac surgery is through. Given that the use of the 6MWT is growing in population undergoing cardiac surgery, the aim of this study was to identify the determinants of 6MWD at hospital discharge in patients undergoing cardiac surgery. In addition to establishing a reference equation and test its reliability
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