Six minute walk

The 6MWT is a critical submaximal exercise test in the assessment of PAH. The absolute distance achieved at baseline has been associated with prognosis and the test can be used to assess for response to treatment. It has been long established as a key outcome in clinical drug trials.  The important feature in the walk is to ensure that it has been carried out in accordance with the ATS recommendations. Furthermore it is important to note if the test has been performed on oxygen,  that the heart rate rises to ensure the patient has exerted themselves and in PAH  desaturation occurs. 

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Figure 1.  Six minute walk test in patient with IPAH 

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