Article

Compared with symptom-limited cardiopulmonary exercise test (CPET),
timed walking tests are cheaper, well-tolerated and simpler alternative for
assessing exercise capacity in coronary artery disease (CAD) patients. We
developed multivariate models for predicting peak oxygen consumption (VO2peak)
from 6-minute walk test (6MWT) distance and peak shuttle walk speed for elderly
stable CAD patients. METHODS: Fifty-eight CAD patients (72 SD 6 years, 66% men)
completed: (1) CPET with expired gas analysis on a cycle ergometer, (2)
incremental 10-meter shuttle walk test, (3) two 6MWTs, (4) anthropometric
assessment and (5) 30-second chair stands. Linear regression models were
developed for estimating VO2peak from 6MWT distance and peak shuttle walk speed
as well as demographic, anthropometric and functional variables. RESULTS:
Measured VO2peak was significantly related to 6MWT distance (r = 0.719, p <
0.001) and peak shuttle walk speed (r = 0.717, p < 0.001). The addition of
demographic (age, gender), anthropometric (height, weight, body mass index, body
composition) and functional characteristics (30-second chair stands) increased
the accuracy of predicting VO2peak from both 6MWT distance and peak shuttle walk
speed (from 51% to 73% of VO2peak variance explained). CONCLUSIONS: Addition of
demographic, anthropometric and functional characteristics improves the accuracy
of VO2peak estimate based on walking tests in elderly individuals with stable
CAD. Implications for Rehabilitation Timed walking tests are cheaper,
well-tolerated and simpler alternative for assessing exercise capacity in cardiac
patients. Walking tests could be used to assess individual's functional capacity
and response to therapeutic interventions when symptom-limited cardiopulmonary
exercise testing is not practical or not necessary for clinical reasons. Addition
of demographic, anthropometric and functional characteristics improves the
accuracy of peak oxygen consumption estimate based on 6-minute walk test distance
and peak shuttle walk speed in elderly patients with coronary artery disease.

Langue : ANGLAIS