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01.12.2014 | Research article | Ausgabe 1/2014 Open Access

Journal of Cardiothoracic Surgery 1/2014

Determinants of distance walked during the six-minute walk test in patients undergoing cardiac surgery at hospital discharge

Journal of Cardiothoracic Surgery > Ausgabe 1/2014
Géssica Uruga Oliveira, Vitor Oliveira Carvalho, Lucas Pereira de Assis Cacau, Amaro Afrânio de Araújo Filho, Manoel Luiz de Cerqueira Neto, Walderi Monteiro da Silva Junior, Telma Cristina Fontes Cerqueira, Valter Joviniano de Santana Filho
Wichtige Hinweise

Electronic supplementary material

The online version of this article (doi:10.​1186/​1749-8090-9-95) contains supplementary material, which is available to authorized users.

Competing interests

The authors declare that they have no competing interests.

Authors’ contributions

GUO, VOC, LPAC, AAAF, MLCN, WMSJ, TCFC and VJSF conceived and planned the activities that led to the study. GUO and LPAC performed assessments. GUO assessed the data. GUO, VOC, MLCN, WMSJ and VJSF prepared the manuscript. All authors read and approved the final manuscript.



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.


The 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.


Sixty 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.


In this study, the determinants of 6MWD in patients undergoing cardiac surgery were: the type of surgery, CPB time, functional capacity and body mass index.
Authors’ original file for figure 1
Authors’ original file for figure 2
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